A carpenter is putting a skylight in a roof. If the roof measures 10x + 9 by 7x + 7 and the skylight measures x + 5 by 3x + 3, what is the area of the remaining roof after the skylight is built?

Question

A.) 67x^2 + 115x + 48**
B.) 73x^2 + 151x + 78
C.) 70x^2 + 133x + 63

Answer 1

remaining area: roof-skylight
= (10x+9)(7x+7)- (x+5)(3x+3)

you need to multiply these out, but there is a shortcut here: just do the x^2 terms
= 70x^2 + ...-3x^2= 67x^2 + .....
you are correct.

Answer 2

Thank you.

Answer 3

A IS THE ANSWER, I just took the test
67x^2…. Is the answer

Answer 4

still correct pogchamp is now illegal dont call the cops on me for saying it pls

Answer 5

still correct <3