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Eduardwww [97]
3 years ago
15

Last year at a certain high school, there were 100 boys on the honor roll and 60 girls on the honor roll. This year, the number

of boys on the honor roll increased by 20% and the number of girls on the honor roll increased by 25%. By what percentage did the total number of students on the honor roll increase? Round your answer to the nearest tenth (if necessary).
Mathematics
1 answer:
defon3 years ago
4 0

Answer:

last year 100 boys and 60 girls, for a total of 160.

this year, 120 boys and 75 girls, for a total of 195.

35 more than 160 is a 21.8% increase

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Write an equation of the line below.
Dafna11 [192]

Answer:

\large\boxed{y=4x+3}

Step-by-step explanation:

The slope-intercept form of an equation of aline:

y=mx+b

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<em>b</em><em> - y-intercept</em>

The formula of a slope:

m=\dfraxc{y_2-y_1}{x_2-x_1}

From the graph we have the points:

(-2, -5)

y-intercept (0, 3) → <em>b = 3</em>

Calculate the slope:

m=\dfrac{3-(-5)}{0-(-2)}=\dfrac{8}{2}=4

Put the value of the slope and the y-intercept to the equation of a line:

y=4x+3

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3 years ago
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alexira [117]

Answer:

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k= -2x+3

x= (3-k)/2

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3 years ago
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erastova [34]

the greater common factor is : a.2

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Use the parabola tool to graph the quadratic function f(x)=(x-5)^2+1
andrey2020 [161]

Answer:

Look to the attached graph

Step-by-step explanation:

* Lets revise how to graph the quadratic function

- Find the vertex of it

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- The completing square form for any quadratic is

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* Lets compare the two forms

∵ (x - h)² + k = (x - 5)² + 1

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∴ The vertex of the parabola is (5 , 1)

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∵ (x - 5)² + 1 = 0 ⇒ subtract 1 from both sides

∴ (x - 5)² = -1 ⇒ the square can not give -ve number

∴ The parabola does not intersect the x-axis

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∴ The parabola intersects the y-axis at point (0 , 26)

- The parabola is opened upward because the coefficient of x² is +ve

* Now lets graph it

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barxatty [35]

Answer:

D

Step-by-step explanation:

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