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borishaifa [10]

3 years ago

9

The function f(x) =4x+3 represents the length of a rectangle. The function g(x)=2x-5 represents the width of the rectangle.Use (

f•g)(4) to determine the area of a rectangle

1 answer:

Salsk061 [2.6K]3 years ago

3 0

Answer:

45 square units

Step-by-step explanation:

g(4)=2(4)-5=8-5=3

f(g)=f(3)=4(3)+3=12+3=15

area=length*width=3*15=45

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3 years ago

Michael’s weight can be represented by the expression 72x^5. Al’s weight can be represented by the expression 9x^7.

podryga [215]

Answer:

a) $\frac{72x^5}{9x^7}$

b) $=\frac{8}{x^2}$

c), Yes; $8x^2$

Step-by-step explanation:

Michael's Weight: $72x^5$

Al's weight: $9x^7$

a) Ratio of Michael's weight to Al's weight: $\frac{72x^5}{9x^7}$

b) This ratio simplifies to: $\frac{8\times 9x^5}{9x^5\timesx^2}$

$=\frac{8}{x^2}$

c) Yes, If the exponent in each expression were negative, then we have:

Ratio of Michael's weight to Al's weight: $\frac{72x^{-5}}{9x^{-7}}$

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The two ratios are not the same.

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3 years ago