Explain how do use estimates to find total surface area of all of the walls in both rooms without needing a calculator one room has an area of 99 ft.² and second room has an area of 40 5 ft.² both room a has a area of 99 ft.² and ruby is 405 feet both rooms are clear each will be the square root of blank?

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

7,24

step-by-step explanation:

if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.