Mr. Goodman's art class designed a mural for their school's cafeteria. First, they tested their idea with a 2-fluid-ounce tube of paint and a small canvas. They needed half of the tube to cover the 0.25-square-foot canvas. Now, they feel ready to paint the actual 48-square-foot mural. How many gallons of paint should Mr. Goodman's class buy for their mural?

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

the answer is 13 cm

what was there favorite food

replication and blocking

step-by-step explanation: