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2 years ago

Y varies directly as x . when x=3 , then y=12 . find y when x=20.

Mathematics

1 answer:

Phoenix [80]2 years ago

3 0

Answer:

Congress. would equal 80 due to x being worth 1/4 of y's total.

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If n+h/5=f+9/9, then n/5=

Ann [662]

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Question
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$\boxed { \frac{n+h}{5} = \frac{f+9}{9}}$

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Split the fraction on the left
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$\boxed { \frac{n}{5} + \frac{h}{5} = \frac{f + 9}{9}}$

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Take away h/5 from both sides
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$\boxed { \frac{n}{5} = \frac{f+9}{9} - \frac{h}{5}}$

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Change the denominator to be the same
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$\boxed { \frac{n}{5} = \frac{5f+45}{45} - \frac{9h}{45}}$

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Put it into single fraction
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$\boxed { \frac{n}{5} = \frac{5f+45-9h}{45} }$

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Rearrange (This step may not be necessary)
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$\boxed {\frac{n}{5} = \frac{5f-9h+ 45}{45} }$

$\bf \Longrightarrow \ Answer \ : \boxed {\boxed {\frac{n}{5} = \frac{5f-9h+ 45}{45} }}$

6 0

3 years ago

What are the x-intercepts of a parabola with a vertex of (-1,-16) and a y-intercept of (0,-15)?

Svetlanka [38]

The vertex-form equation is
y = a(x+1)² -16
Putting in the y-intercept values, we have
-15 = a(0+1)² -16
1 = a . . . . . . . . . . . add 16

Then the x-intercepts can be found where y=0.
0 = (x+1)² -16
16 = (x+1)²
±4 = x+1
x = -1 ± 4 = {-5, 3}

8 0

3 years ago

Write an equation for a line that passes thruogh (3,-1) and has a slope of 2

harkovskaia [24]

Answer:

y=2x−7

Step-by-step explanation:

formula is ( y 1 − y = m ( x 1 − x))

m is the slope

-1-y=2(3-x)

add 1 to both sides

−y−1+1=−2x+6+1

−y=−2x+7

divide both sides by -1

y=2x−7

Hope this helps

Brainliest please

Ask if u have more questions.

3 0

3 years ago

What is the value of x?

eimsori [14]

Answer:

16.1

Step-by-step explanation:

7 0

3 years ago

Studentka2010 [4]

Answer:

What the english?

Step-by-step explanation:

bdhznrbzjdnxhenaFjskrnx

4 0

3 years ago