Scott earns $5 for each lawn he mows. on saturday he mowed 6 lawns, and on sunday he mowed 8 lawns. which of the following expressions represents how much scott earned for the weekend (in dollars)? a. 2003-01-04-00-00_files/i0100000.jpg b. 5(6 + 8) c. 2003-01-04-00-00_files/i0100001.jpg d. 6(5 + 8)

step-by-step explanation:

b and c

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