Question

Mike is building a rectangular dog pen the length of the pen is 20 feet greater than its with w

Answer 1

Answer:

$f(W)=W^{2} +20W$

Step-by-step explanation:

we know that

The area of a rectangle is equal to

$A=LW$ -----> equation A

we have

$L=W+20$ -----> equation B

substitute the equation B in equation A

$A=(W+20)W$

Rewrite as a function

$f(W)=(W+20)W$

$f(W)=W^{2} +20W$