Answer:
16m^2 + 72m + 81
Step-by-step explanation:
you expand it, by (9+4m)(9+4m), using distributive property you get
81 + 36m + 36m + 16m^2, simplifying you get the answer
Graph the image of the given polygon under a dilation with a scale factor of 1/3 and center of dilation (0, 0) .
The image of the given polygon under a dilation with a scale factor of 1/3 about the center of dilation (0, 0) is A'(0, 0), B'(1, 2) and C'(-1, 1)
What is transformation?Transformation is the movement of a point from its initial location to a new location. Types of transformation are reflection, translation, rotation and dilation.
Rigid transformation is a transformation that preserves the shape and size of a figure such as translation, reflection and rotation.
Let us assume that the polygon has vertex at A(0, 0), B(3, 6) and C(-3, 3)
The image of the given polygon under a dilation with a scale factor of 1/3 about the center of dilation (0, 0) is A'(0, 0), B'(1, 2) and C'(-1, 1)
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pls help questions 1-5 and 6-10
Step-by-step explanation:
1.on foot -270
by bus-180
byMTR- 126
BY SCHOOL BUS -144
2.68%
4.94%
5.70%
7.16
9.72
10.960
I thought I just had to half the diameter and then put it into the volume formula for cylinders but ig I was wrong? Help please?
Answer:
10830.87 mm³
Step-by-step explanation:
Hello!
Volume of a cylinder: [tex]V = \pi r^2(h)[/tex]
[tex]\pi[/tex] = pir = radius (half diameter)h = heightThe radius for this cylinder is 9.525, after dividing 19.05 by 2.
Plug it into the volume formula to solve for the volume.
Find the Volume[tex]V = \pi r^2(h)[/tex][tex]V = \pi (9.525)^2(38)[/tex][tex]V = \pi (90.725625)(38)[/tex][tex]V = 3447.57375\pi[/tex][tex]V = 1083087236570...\approx10830.87[/tex]The volume is approximately 10830.87 cubic millimeters.
Determine the slope of the line.
Answer:
2
Step-by-step explanation:
→ Find 2 points from the line
( 0 , 6 ) and ( - 3 , 0 )
→ Find the change in y coordinates
0 - 6 = -6
→ Find the change in x coordinates
-3 - 0 = -3
→ Divide the 2 results
-6 ÷ -3 = 2
A regular decagon is rotated n degrees about its center the decagon onto itself . This value of n could be
value of n could be 252 degree. Option 4
How to determine the value
It is important to note that a decagon is a ten-sided polygon.
Since, a decagon has 10 sides
And we know that the angle made in one complete rotation is 360 degree.
Now find angle made in each rotation by the decagon is 360,
= 360/ 10
= 36 degrees
Now, we have to find possible values of n, and 'n' must be a multiple of 36
Apply hit and trial from given options.
We observe that from given options, only 252 degree is multiple of 36.
Therefore, value of n could be 252 degree. Option 4
The complete question is ;
A regular decagon is rotated n degrees about its center, carrying the decagon onto itself. The value of n could be:
1. 10 degrees
2. 150 degrees
3. 225 degrees
4. 252 degrees
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Which type of professional would help the government
determine where to set the price of oranges for U.S.
markets?
O Consumers
O Economists
O Exporters
O Importers
Answer:
Step-by-step explanation:
The answer is Economists
Answer: economists
Step-by-step explanation: got it right
Help me solve this it’s very urgent
Answer:
SAVE WATER
Step-by-step explanation:
i)
x + 1 = 20
subtract 1 from both sides
x + 1 - 1 = 20 - 1
x = 19
19 = S
ii)
15 = 2x + 13
subtract 13 from both sides
15 - 13 = 2x + 13 - 13
2 = 2x
divide both sides by 2
2/2 = 2x/2
1 = x
1 = A
iii)
2x + 5 = 49
subtract 5 from both sides
2x + 5 - 5 = 49 - 5
2x = 44
divide both sides by 2
2x/2 = 44/2
x = 22
22 = V
iv)
[tex]\frac{3x + 3}{2}[/tex] = 9
multiply both sides by 2
[tex]\frac{3x + 3}{2}[/tex] x 2 = 9 x 2
3x + 3 = 18
subtract 3 from both sides
3x + 3 - 3 = 18 - 3
3x = 15
divide both sides by 3
3x/3 = 15/3
x = 5
5 = E
v)
8(x - 7) = 128
apply the distributive law
8x - 56 = 128
add 56 to both sides
8x - 56 + 56 = 128 + 56
8x = 184
divide both sides by 8
8x/8 = 184/8
x = 23
23 = W
vi)
16 = 2(x + 7)
apply the distributive law
16 = 2x + 14
subtract 14 from both sides
16 - 14 = 2x + 14 - 14
2 = 2x
divide both sides by 2
2/2 = 2x/2
1 = x
1 = A
vii)
[tex]\frac{7y}{7}[/tex] = 20
sevens cancel out
y = 20
20 = T
viii)
2x - 1 = 9
add 1 to both sides
2x - 1 + 1 = 9 + 1
2x = 10
divide both sides by 2
x = 5
5 = E
ix)
2(x - 8) = 20
apply the distributive property
2x - 16 = 20
add 16 to both sides
2x - 16 + 16 = 20 + 16
2x = 36
divide both sides by 2
2x/2 = 36/2
x = 18
18 = R
Code Word/s: SAVE WATER
hope this helps :)
Answer:
Save Water
Step-by-step explanation:
(I’m sorry it took so long, I had to write it out Σ(=д=ノ)ノ
I hope this helps! ヾ(>ꇴ<) xx
Please help asap!!
Find the sum for the first 500 terms given the sequence -1,-3,-5,-7.....
Answer: -250000
Step-by-step explanation:
Sum of arithmetic terms = n/2[2a + (n - 1)d],
where 'a' is the first term,
'd' is the common difference between two numbers,
and 'n' is the number of terms.
'a' = -1
'd' = -2
'n' = 500
plug and chug
(500)/2[2(-1) + ((500)-1)*(-2)] =
250[-2 + -998] =
250[-1000] =
-250000
Evaluate the following integral (Calculus 2) Please show step by step explanation!
Answer:
[tex]\dfrac{1}{2} \left(25 \arcsin \left(\dfrac{x}{5}\right) -x\sqrt{25-x^2}\right) + \text{C}[/tex]
Step-by-step explanation:
Fundamental Theorem of Calculus
[tex]\displaystyle \int \text{f}(x)\:\text{d}x=\text{F}(x)+\text{C} \iff \text{f}(x)=\dfrac{\text{d}}{\text{d}x}(\text{F}(x))[/tex]
If differentiating takes you from one function to another, then integrating the second function will take you back to the first with a constant of integration.
Given indefinite integral:
[tex]\displaystyle \int \dfrac{x^2}{\sqrt{25-x^2}}\:\:\text{d}x[/tex]
Rewrite 25 as 5²:
[tex]\implies \displaystyle \int \dfrac{x^2}{\sqrt{5^2-x^2}}\:\:\text{d}x[/tex]
Integration by substitution
[tex]\boxed{\textsf{For }\sqrt{a^2-x^2} \textsf{ use the substitution }x=a \sin \theta}[/tex]
[tex]\textsf{Let }x=5 \sin \theta[/tex]
[tex]\begin{aligned}\implies \sqrt{5^2-x^2} & =\sqrt{5^2-(5 \sin \theta)^2}\\ & = \sqrt{25-25 \sin^2 \theta}\\ & = \sqrt{25(1-\sin^2 \theta)}\\ & = \sqrt{25 \cos^2 \theta}\\ & = 5 \cos \theta\end{aligned}[/tex]
Find the derivative of x and rewrite it so that dx is on its own:
[tex]\implies \dfrac{\text{d}x}{\text{d}\theta}=5 \cos \theta[/tex]
[tex]\implies \text{d}x=5 \cos \theta\:\:\text{d}\theta[/tex]
Substitute everything into the original integral:
[tex]\begin{aligned}\displaystyle \int \dfrac{x^2}{\sqrt{5^2-x^2}}\:\:\text{d}x & = \int \dfrac{25 \sin^2 \theta}{5 \cos \theta}\:\:5 \cos \theta\:\:\text{d}\theta \\\\ & = \int 25 \sin^2 \theta\end{aligned}[/tex]
Take out the constant:
[tex]\implies \displaystyle 25 \int \sin^2 \theta\:\:\text{d}\theta[/tex]
[tex]\textsf{Use the trigonometric identity}: \quad \cos (2 \theta)=1 - 2 \sin^2 \theta[/tex]
[tex]\implies \displaystyle 25 \int \dfrac{1}{2}(1-\cos 2 \theta)\:\:\text{d}\theta[/tex]
[tex]\implies \displaystyle \dfrac{25}{2} \int (1-\cos 2 \theta)\:\:\text{d}\theta[/tex]
[tex]\boxed{\begin{minipage}{5 cm}\underline{Integrating $\cos kx$}\\\\$\displaystyle \int \cos kx\:\text{d}x=\dfrac{1}{k} \sin kx\:\:(+\text{C})$\end{minipage}}[/tex]
[tex]\begin{aligned} \implies \displaystyle \dfrac{25}{2} \int (1-\cos 2 \theta)\:\:\text{d}\theta & =\dfrac{25}{2}\left[\theta-\dfrac{1}{2} \sin 2\theta \right]\:+\text{C}\\\\ & = \dfrac{25}{2} \theta-\dfrac{25}{4}\sin 2\theta + \text{C}\end{aligned}[/tex]
[tex]\textsf{Use the trigonometric identity}: \quad \sin (2 \theta)= 2 \sin \theta \cos \theta[/tex]
[tex]\implies \dfrac{25}{2} \theta-\dfrac{25}{4}(2 \sin \theta \cos \theta) + \text{C}[/tex]
[tex]\implies \dfrac{25}{2} \theta-\dfrac{25}{2}\sin \theta \cos \theta + \text{C}[/tex]
[tex]\implies \dfrac{25}{2} \theta-\dfrac{5}{2}\sin \theta \cdot 5 \cos \theta + \text{C}[/tex]
[tex]\textsf{Substitute back in } \sin \theta=\dfrac{x}{5} \textsf{ and }5 \cos \theta = \sqrt{25-x^2}:[/tex]
[tex]\implies \dfrac{25}{2} \theta-\dfrac{5}{2}\cdot \dfrac{x}{5} \cdot \sqrt{25-x^2} + \text{C}[/tex]
[tex]\implies \dfrac{25}{2} \theta-\dfrac{1}{2}x\sqrt{25-x^2} + \text{C}[/tex]
[tex]\textsf{Substitute back in } \theta=\arcsin \left(\dfrac{x}{5}\right) :[/tex]
[tex]\implies \dfrac{25}{2} \arcsin \left(\dfrac{x}{5}\right) -\dfrac{1}{2}x\sqrt{25-x^2} + \text{C}[/tex]
Take out the common factor 1/2:
[tex]\implies \dfrac{1}{2} \left(25 \arcsin \left(\dfrac{x}{5}\right) -x\sqrt{25-x^2}\right) + \text{C}[/tex]
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A zookeeper is monitoring the population of penguins. the group needs to have exactly two times more males than females for the population to thrive. the zoo only has room for a maximum of 10 female penguins. let x represent the number of female penguins and y represent the number of male penguins. write the constraints that represent the possible number of male and female penguins that can live in a thriving population at the zoo. 0 < x ≤ 10 and 0 < y ≤ 20 x > 0 and y > 0 0 < x ≤ 10 and y > 20 x > 0 and y < 10
Answer:
0 < x ≤ 10 and 0 < y ≤ 20.
Step-by-step explanation:
I did the test and got it right ma bois.
Answer: Its A
Step-by-step explanation:
can someone pls solve this
The value of Z in given equation is -55.
According to the statement
We have given that a linear equation which is
2 = 1/5z +13
And from this equation we have to find the value of the z.
So, For this purpose
we know that the
A linear equation is an algebraic equation of the form y=mx+b. involving only a constant and a first-order (linear) term, where m is the slope and b is the y-intercept.
So, The equation is
2 = 1/5z +13
1/5z +13-2 = 0
1/5z +11 = 0
z = -11*5
z = -55
here z + 55 =0
So, The value of Z in given equation is -55.
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ASAP PLEASE please please
[tex]{ \qquad\qquad\huge\underline{{\sf Answer}}} [/tex]
Let's solve ~
[tex]\qquad \sf \dashrightarrow \: \cfrac{1}{b} + 10 = \cfrac{9}{b} + 7[/tex]
[tex]\qquad \sf \dashrightarrow \: \cfrac{9}{b} - \cfrac{1}{b} = 10 - 7[/tex]
[tex]\qquad \sf \dashrightarrow \: \cfrac{8}{b} = 3[/tex]
[tex]\qquad \sf \dashrightarrow \: b = \cfrac{8}{3} [/tex]
Answer:
[tex]b=\dfrac{8}{3}[/tex]
Step-by-step explanation:
Given equation:
[tex]\dfrac{1}{b}+10=\dfrac{9}{b}+7[/tex]
Subtract 10 from both sides:
[tex]\implies \dfrac{1}{b}+10-10=\dfrac{9}{b}+7-10[/tex]
[tex]\implies \dfrac{1}{b}=\dfrac{9}{b}-3[/tex]
Multiply both sides by b:
[tex]\implies \dfrac{1 \cdot b}{b}=\dfrac{9 \cdot b}{b}-3b[/tex]
[tex]\implies 1=9-3b[/tex]
Add 3b to both sides:
[tex]\implies 1+3b=9-3b+3b[/tex]
[tex]\implies 3b+1=9[/tex]
Subtract 1 from both sides:
[tex]\implies 3b+1-1=9-1[/tex]
[tex]\implies 3b=8[/tex]
Divide both sides by 3:
[tex]\implies \dfrac{3b}{3}=\dfrac{8}{3}[/tex]
[tex]\implies b=\dfrac{8}{3}[/tex]
find all the frist differnce and explian your answer
Answer: No this is not a linear function as the y values have different first differences.
Step-by-step explanation:
First we look at the x values. We start off and look at the second x value and subtract the first x value from it (That would be 1-0) and that equals to 1. Then we look at the third x value and subtract the second x value from it (2-1) and that equals to 1. Then we look at the fourth x value and subtract the third x value from it (That would be 3-2) and that is 1. Next we look at the fifth x value and subtract the fourth x value from it (That would be 4-3) and that is 1.
Now we look at the y values and do the same thing as with the x values. We start off and look at the second y value and subtract the first y value from it (That would be 1-0) and that equals to 1. Then we look at the third y value and subtract the second y value from it (4-1) and that equals to 3. Then we look at the fourth y value and subtract the third y value from it (That would be 9-4) and that is 5. Next we look at the fifth y value and subtract the fourth y value from it (That would be 16-9) and that is 7.
Even though the x values all have the same first differences, the y values do not and so this cannot be a linear function.
I hope this helps. Tell me if something doesn't make sense.
Answer:
No, it is a quadratic relation.
Step-by-step explanation:
Work out the first differences between the given y-values:
[tex]0 \underset{+1}{\longrightarrow} 1 \underset{+3}{\longrightarrow} 4 \underset{+5}{\longrightarrow} 9 \underset{+7}{\longrightarrow} 16[/tex]
As the first differences are not the same, this is not a linear relation.
Work out the second differences:
[tex]1 \underset{+2}{\longrightarrow} 3\underset{+2}{\longrightarrow}5\underset{+2}{\longrightarrow}7[/tex]
As the second differences are the same, the relation is quadratic and will contain an x² term. The coefficient of x² is always half of the second difference. As the second difference is 2, the coefficient of x² is one.
[tex]\begin{array}{|c|c|c|c|c|c|}\cline{1-6}x & 0 & 1 & 2 & 3 & 4\\\cline{1-6}x^2 & 0 & 1 & 4 & 9 & 16\\\cline{1-6}\end{array}[/tex]
Comparing x² with the given y-values, we can see that no further operation is needed. Therefore, the relation is quadratic and the equation is [tex]y=x^2[/tex].
17. A bag contains 2x yellow counters, 4x + 6 red counters and 6x - 10 blue counters. a. Write an expression, in terms of x, for the total number of counters in the bag.
The total number of counters in the bag is 44.
b. Work out the number of blue counters in the bag.
c. How many more red counters are there than blue counters in the bag?
Answer: 12x-4, 14 counters, 8 more counters
Step-by-step explanation: There are 2x yellow, 4x+6 red, and 6x-10 blue counters. We need to add all of this up to get the total number of counters. We first add the x's : 2x+4x+6x = 12x. Then we add the numbers. 6+ (-10) is -4. So, our expression is 12x-4. Next, we need to find out how many blue counters are in the bag. We know that there are 44 total counters and we need to find x because all the counters have x in them. 12x-4 = 44. We first add 4 to both sides to get 12x= 48 and x = 4. blue has 6x-10 counters so, blue has 24-10 = 14 counters. Red has 16+6 = 22 counters. 22-14 = 8 more counters
Use the laplace transform to solve the given system of differential equations. dx dt + 3x + dy dt = 1 dx dt − x + dy dt − y = et x(0) = 0, y(0) = 0
Let [tex]X(s)[/tex] and [tex]Y(s)[/tex] denote the Laplace transforms of [tex]x(t)[/tex] and [tex]y(t)[/tex].
Taking the Laplace transform of both sides of both equations, we have
[tex]\dfrac{dx}{dt} + 3x + \dfrac{dy}{dt} = 1 \implies \left(sX(s) - x(0)\right) + 3X(s) + \left(sY(s) - y(0)\right) = \dfrac1s \\\\ \implies (s+3) X(s) + s Y(s) = \dfrac1s[/tex]
[tex]\dfrac{dx}{dt} - x + \dfrac{dy}{dt} = e^t \implies \left(sX(s) - x(0)\right) - X(s) + \left(sY(s) - y(0)\right) = \dfrac1{s-1} \\\\ \implies (s-1) X(s) + s Y(s) = \dfrac1{s-1}[/tex]
Eliminating [tex]Y(s)[/tex], we get
[tex]\left((s+3) X(s) + s Y(s)\right) - \left((s-1) X(s) + s Y(s)\right) = \dfrac1s - \dfrac1{s-1} \\\\ \implies X(s) = \dfrac14 \left(\dfrac1s - \dfrac1{s-1}\right)[/tex]
Take the inverse transform of both sides to solve for [tex]x(t)[/tex].
[tex]\boxed{x(t) = \dfrac14 (1 - e^t)}[/tex]
Solve for [tex]Y(s)[/tex].
[tex](s - 1) X(s) + s Y(s) = \dfrac1{s-1} \implies -\dfrac1{4s} + s Y(s) = \dfrac1{s-1} \\\\ \implies s Y(s) = \dfrac1{s-1} + \dfrac1{4s} \\\\ \implies Y(s) = \dfrac1{s(s-1)} + \dfrac1{4s^2} \\\\ \implies Y(s) = \dfrac1{s-1} - \dfrac1s + \dfrac1{4s^2}[/tex]
Taking the inverse transform of both sides, we get
[tex]\boxed{y(t) = e^t - 1 + \dfrac14 t}[/tex]
There are 8 blue socks in Sean’s drawer. After he removes 3 blue socks and 4 non-blue socks, the probability to pick a blue sock at random becomes 1/7. How many non-bluesocks were in Sean’s drawer originally?
Answer:
34
Step-by-step explanation:
you first write the equation:
(8-3) / (8+x-7) = 1/7, where x is the number of non blue socks
so, 5/(1+x) = 1/7
1+x = 35, so x=34
Which inequality in standard form represents the region greater than the quadratic function with zeros –3 and 6 and includes the point (–2, –16) on the boundary line?
Answer:
C
Step-by-step explanation:
y > 2x² - 6x - 36 is the inequality in standard form represents the region greater than the quadratic function with zeros –3 and 6 and includes the point (–2, –16) on the boundary line. This can be obtained by finding zeroes of each inequality to check whether the zeroes are –3 and 6 and then substituting (–2, –16) in the inequality.
Find the required inequality:To find the zeroes of the inequality we use the formula,
x = (-b ± √b² - 4ac)/ 2a, where a, b and c are the coefficients of x², x and constant respectively.
Option 1 : y > 1/2 x² - 3/2x - 9Find the zeroes,
x = (3/2 ± √9/4 + 18)
x = 3/2 ± 9/2
⇒ x = 12/2 = 6, x = -6/2 = - 3
Putting x = –2 in the inequality we get,
1/2 x² - 3/2x - 9 = 1/2 (-2)² - 3/2(-2) - 9
= 2 + 3 - 9 = - 4 ≠ -16
Therefore option 1 is incorrect
Option 2 : y > 2 x² + 6x - 36
Find the zeroes,
x = (-6 ± √36 + 288) / 4
x = (-6 ± 18) / 4
⇒ x = 12/4 = 3, x = -24/4 = - 6
Therefore option 2 is incorrect
Option 3 : y > 2 x² - 6x - 36Find the zeroes,
x = (6 ± √36 + 288) / 4
x = (6 ± 18) / 4
⇒ x = 24/4 = 6, x = -12/4 = - 3
Also , Putting x = –2 in the inequality we get,
2 x² - 6x - 36 = 2 (-2)² - 6(-2) - 36
= 8 + 12 -36
= - 16
The inequality includes the point (–2, –16) on the boundary line.
Hence y > 2x² - 6x - 36 is the inequality in standard form represents the region greater than the quadratic function with zeros –3 and 6 and includes the point (–2, –16) on the boundary line.
Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: Which inequality in standard form represents the region greater than the quadratic function with zeros –3 and 6 and includes the point (–2, –16) on the boundary line?
a) y > 1/2 x² - 3/2x - 9
b) y > 2 x² - 6x - 36
c) y > 2 x² - 6x - 36
d) y > 1/2 x² + 3/2x - 9
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Jeremy deposited xxx dollars in his investment account on January 111, 200120012001. The amount of money in the account doubled each year until Jeremy had 480480480 dollars in his investment account on January 111, 200520052005. What is the value of xxx
The value of x is $30.
What is the value of x?From the question, it can be deduced that Jeremy's investment account earns a compound interest. Compound interest is when the amount invested and the interest that has already accrued increases in value anytime interest is paid.
The formula that can be used to determine the value of x is:
x = FV / (1+r)^t
FV = Future value = 480R = interest rate = 100%N = number of years : 2005 - 2001 = 4X = 480 / (2^4) = $30
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The engineer wants to modify the roller coaster design by transforming the function. which represents 2 f (0.3 x minus 1) 10, the modified design of the roller coaster?
The function which represents the modified design of the roller coaster is Y = 2f(0.15x²-10x+C).
What define a function?
A technical definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.
Here, the function: Y = 2f(0.3x - 1) + 10
Therefore, to transform the function
We have to compare with a general function and integrate.
g(x) = f(bx + c).
We now integrate to transform the function which gives us
Y = (2f) integral {0.3x - 1} + 10
Y = 2f { 0.15x² - x } + 10x + c
Y = 2f(0.15x²-10x+C)
Modified design of roller coaster is
Y = 2f(0.15x²-10x+C)
Thus, the function which represents the modified design of the roller coaster is Y = 2f(0.15x²-10x+C).
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Answer:
A graph 1
Step-by-step explanation:
HELP WITH MATH PLS!!!!!
The difference of 32 · x² / (x² + 8 · x + 15) - 14 · x² / (x² - 9) is equal to [18 · x³ - 166 · x²] / [(x + 3) · (x + 5) · (x - 3)]. (Correct choice: B)
What is the result of the subtraction between two algebraic rational functions?
In this question we have a subtraction between two rational functions, which have to be simplified by algebra properties. The complete procedure is presented below:
32 · x² / (x² + 8 · x + 15) - 14 · x² / (x² - 9) Given
32 · x² / [(x + 3) · (x + 5)] - 14 · x² / [(x + 3) · (x - 3)] Factorization
[x² / (x + 3)] · [32 / (x + 5) - 14 / (x - 3)] Distributive and associative properties
[x² / (x + 3)] · [32 · (x - 3) - 14 · (x + 5)] / [(x + 5) · (x - 3)] Subtraction of rational numbers with distinct denominators
[x² / (x + 3)] · [32 · x - 96 - 14 · x - 70] / [(x + 5) · (x - 3)] Distributive property / (- 1) · a = - a
[x² / (x + 3)] · (18 · x - 166) / [(x + 5) · (x - 3)] Distributive property / Definitions of addition and subtraction
[18 · x³ - 166 · x²] / [(x + 3) · (x + 5) · (x - 3)] Mutiplication between rational numbers / Multiplication between powers / Distributive property
The difference of 32 · x² / (x² + 8 · x + 15) - 14 · x² / (x² - 9) is equal to [18 · x³ - 166 · x²] / [(x + 3) · (x + 5) · (x - 3)]. (Correct choice: B)
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the angle of depression from the top of the tower to a boulder on the ground is 38 degrees if the tower is 25 m high how far from the base of the tower is the boulder
Check the picture below.
Make sure your calculator is in Degree mode.
In a certain exam of grade ten, 75% students got high score in mathematics, 65%
students got high score in English. If 6% of them did not get high score in both
mathematics and English, then calculate:
i. the percent of students who got high score in both the subjects.
ii. the total number of students who got high score either in mathematics or
in English if 300 students had attended the exam.
Mathematics, grade 10
(i) The percentage of students who got high scores in both the subjects English and Mathematics is 46%.
(ii) The total number of students who got high scores either in Mathematics or in English if 300 students had attended the exam exists 138.
What is probability?The probability exists in the analysis of the possibilities of happening of an outcome, which exists acquired by the ratio between favorable cases and possible cases.
The number of students who got high scores in Mathematics was 75%.
The number of students who got high scores in English was 65%.
(i) The percentage of students who got high scores in both the subjects
100% - 6% = 94%
(75% + 65%) - 94%
= 140% - 94%
= 46%
Therefore, the percentage of students who got high scores in both the subjects English and Mathematics is 46%.
(ii) The total number of students who got high scores either in Mathematics or in English if 300 students had attended the exam
= 300 [tex]*[/tex] 46%
= 300 [tex]*[/tex] (46 / 100)
= 300 [tex]*[/tex] 0.46
= 138.
Therefore, the total number of students who got high scores either in Mathematics or in English if 300 students had attended the exam exists 138.
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Simplify this expression
Answer:
[tex]4^{6}[/tex]
Step-by-step explanation:
When you are dividing exponents, you subtract them.
[tex]4^{9-3}[/tex] which gives you [tex]4^{6}[/tex]
You can check your work by writing it all out
[tex]\frac{4*4*4*4*4*4*4*4*4}{4*4*4}[/tex]
The 3 4s in the denominator will cancel out 3 4s in the numerator.
You are left with only 6 4s in the numerator, which is [tex]4^{6}[/tex]
A radio transmission tower is 210 feet tall. How long should a guy wire be if it is to
be attached 6 feet from the top and is to make an angle of 23° with the ground?
Give your answer to the nearest tenth of a foot.
Answer:
522.1
Step-by-step explanation:
Calculated based on 2 given angles and 1 given side.
Side b = 204
Angle ∠A = 90°
Angle ∠B = 23°
Angle ∠C = 180-90-23 = 67°
a = b·sin(A)/sin(B) = 522.09815
The double number lines show the ratio of yards to miles.How many yards are in 4 miles?
Using proportions, considering the ratio given in the double number line, it is found that there are 7.04 yards in 4 miles.
What is a proportion?A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
Researching the problem on the internet, it is found that there are 3.52 yards in 2 miles. Hence the following rule of three is used to find the number of yards in 4 miles.
2 miles - 3.52 yards
4 miles - n yards
Applying cross multiplication:
2n = 4 x 3.52
Simplifying by 2:
n = 2 x 3.52
n = 7.04 yards.
There are 7.04 yards in 4 miles.
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If the length of the minor axis of an ellipse is 6 units and the length of the major axis is 10 units, how far from the center are the foci located?
The distance from the center to where the foci is located is 8 units
How to determine the distanceThe formula associated with the focus of an ellipse is given as;
c² = a² − b²
where;
c is the distance from the focus to center a is the distance from the center to a vertex , major axis is 10 units b is the distance from the center to a co-vertex, minor axis is 6 unitsLet's use the Pythagorean theorem
Hypotenuse square = opposite square + adjacent square
Substitute the values into the formula
c² = 10² - 6²
Find the square
c² = 100 - 36
c² = 64
Find the square root
c = √64
c = 8
Thus, the distance from the center to where the foci is located is 8 units
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Justine wants to go to the school dance next week, but only if her friend kelly goes. she asks her mom to go, saying she will complete all her homework on time. her mom says she can go to the dance as long as she completes all her chores for the week. using this situation, describe the concepts of conditional probability and independent and dependent events and how they relate to justine’s situation.
Justine only goes when her friend goes [Conditional probability].
Mom going to PROM and Justine going to PROM are separate events. [Independent events].
Mom can't go until she finishes the housework is dependent on events
independent events. [Dependent events]
What is probability?The probability exists in the analysis of the possibilities of happening of a result, which exists acquired by the ratio between favorable cases and possible cases.
Conditional probability directs to the possibility that some outcome happens given that another possibility contains also occurred.
Justine only goes when her friend goes [Conditional probability]
Independent events exist as those possibilities whose occurrence exists not dependent on any other event.
Mom going to PROM and Justine going to PROM are separate events. [Independent events]
Dependent events exist that depend upon what occurred before.
Mom can't go until she finishes the housework is dependent on events
independent events. [Dependent events]
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x^2-15x+54=0 solve for x
Answer: x = 9 and x = 6
Step-by-step explanation:
[tex]x^2-15x+54=0\\(x-9)(x-6)\\x-9=0\\x=9\\x-6=0\\x=6[/tex]
Therefore, x = 9 and x = 6
How many ways are ther eto line up the 12 people if the bride must be next to the maid of honor?
the number of ways to line up the 12 people if the bride must be next to the maid of honor is 132 ways.
How to determine the permutationThe formula for finding the number of arrangement is given as;
Permutation = [tex]\frac{n!}{n - r!}[/tex]
Where;
n is the total number of objectr is the number of selected objectsFrom the question given, we can deduce that
n = 12 people
r = 2, because they must come next to each other and is taken as 2
We then have,
Permutation = [tex]\frac{12!}{12 - 2!}[/tex]
Permutation = [tex]\frac{12!}{10!}[/tex]
Permutation = 132 ways
This is to tell us that the number of ways to arrange the people is 132 ways
Thus, the number of ways to line up the 12 people if the bride must be next to the maid of honor is 132 ways.
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evaluate:25 divided by 5+2 multiplied by 3
Answer:
11
Step-by-step explanation:
25 than you divided 5 + 2 than you multiply 3 and you get
Answer:
11
Step-by-step explanation: