Question

The width w of a rectangular swimming pool is 7x2. The area A of the pool is 7x3 – 42x2. What is an expression for the length of the pool? Show your work.

Answer 1

\(\dfrac{7x^3-42x^2}{7x^2}\)

Answer 2

do you know how to divide this?

Answer 3

Do i divide the the numerators with the same denominator? If so i think i can

Answer 4

because 7 can only be divided by 7 once

Answer 5

yes like this
\(\dfrac{7x^3}{7x^2}\)

Answer 6

correct so 7/7 = 1
how about \(\dfrac{x^3}{x^2}\)

Answer 7

Think it's just x

Answer 8

correct

Answer 9

now \(\dfrac{42x^2}{7x^2}\)

Answer 10

Is it 6, 6+x = 6x @Mehek14

Answer 11

so the length is
\(x+6\)

Answer 12

Okay had it written wrong Thanks Mehek14

Answer 13

\((7x^2)(x+6) = 7x^3 + 42x^2\)

Answer 14

wait it's -6

Answer 15

Oh? how did it get negative?

Answer 16

\(7x^2*(x-6)=7x^3-42x^2\)

Answer 17

because -42/7 = -6

Answer 18

Oh, didn't notice the 42 was negative i would of been way off

Answer 19

me neither :P