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2 years ago

If the value of y varies directly with x when y=50, x=4. What is the value of y when x=2

Mathematics

1 answer:

den301095 [7]2 years ago

8 0

Answer:

Step-by-step explanation:

The general equation for a direct variation is y = k*x

So your first step (usually) is to find k

y = k x

when x = 4

then y = 50

y = k*x
50 = k * 4 Divide by 4
50 / 4 = k*4/4
12.5 = k

Now you can find the value of y when x = 2

y = k*x
k = 12.5
x = 2
y = ?

y = 12.5 * 2

y = 25

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2 years ago

Please help me find the area of shaded region and step by step

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Answer:

Part 1) $A=60\ ft^2$

Part 2) $A=80\ cm^2$

Part 3) $A=96\ m^2$

Part 4) $A=144\ cm^2$

Part 5) $A=9\ m^2$

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Step-by-step explanation:

Part 1) we know that

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where

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h is the height of rectangle

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$A=84-24$

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Part 2) we know that

The shaded region is equal to the area of the complete rectangle minus the area of the interior square

The area of square is equal to

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where

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Part 3) we know that

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$A=96\ m^2$

Part 4) we know that

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Part 5) we know that

The area of the shaded region is equal to the area of triangle minus the area of rectangle

The area of triangle is equal to

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where

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Part 6) we know that

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The area of the circle is equal to

$A=\pi r^{2}$

where

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