(Urgent help please answer) Halims hardware store created flyers to advertise a sale on a certain type of carpet. (Please show work and how answer was made)

945 dollars

Step-by-step explanation:

find 10 percent of 750 and subtract it from 750. then you divide by 5 to get how much it would cost for 100 and then multiply that by 7 to get 700 square feet being 945 dollars

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