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3 years ago

If h(x) = f(x) - g(x) = 2x, at what x-value will f(x) = g(x) + 20?

Mathematics

1 answer:

Olegator [25]3 years ago

8 0

Answer:

Step-by-step explanation:

This is a neat question

f(x) - g(x) = 2x Add g(x) to both sides

f(x) = g(x) + 2x

Now you need the right hand side to have 20 added to g(x).

2x must = 20

2x = 20 Divide by 2

x = 20/2

x = 10

So the answer must be x = 10

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melamori03 [73]

Answer:

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The width of the rectangle is 6 cm

Step-by-step explanation:

Let

x-----> the length of the rectangle

y----> the width of the rectangle

we know that

The perimeter of the rectangle is

$P=2(x+y)$

we have

$P=48\ cm$

$48=2(x+y)$ ------> equation A

$x=2y+6$ ------> equation B

Substitute equation B in equation A and solve for y

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