Question

6.The dimensions of Eric’s pool are 9 feet by 7 feet. He wants to build a walkway surrounding the pool so that the square footage of the walkway and pool is 143 square feet. How wide is one side of the walkway? Use the picture below to help you

Answer 1

it must be like the area of POOL AND SIDEWALK is 143

Answer 2

(9+x)(7+x) = 143

Answer 3

further solving will give us 2 values,

-20 and 4..

So answer is 4.

Answer 4

how did you get 4 and -20?

Answer 5

(9+x)(7+x) = 143

Multiply them,

63 + 7x + 9x + x^2 = 143

x^2 + 16x - 80

Answer 6

x^2 + 16x - 80

x^2 + 20x - 4x - 80

x(x+20) -4(x+20)=0

(x+20)(x-4) = 0

Answer 7

in online classes you just need the answers man, just insert them and get free. LOL.

Answer 8

yahh i know, i yahoo answer those type of questions haha but these ones i had to show work for so i was S.O.L. unless i had help with em trust me, i know the routine on askin for answers, i have about a semester left and im out, so hopefully by december the class will be over. and i just realized how to do the rest of the equation after you said multiply them, so i feel kinda stupid about that part haha

Answer 9

Haha, you can ask your problems here, people will help! :)

Answer 10

again thanks for your help! if theres like another way to give you i guess "medals" or whatever let me know so i can do that for ya