Best Buy has a television with a diagonal of 75 inches on sale. If the television has a length of 66.5 inches, what is the height of the television? (Answer should be rounded to the nearest tenth if necessary. no units! thanks)

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

x-3y=4

step-by-step e

$119.20

step-by-step explanation:

$372.50 - 60% off is $149. $149-20% off is $119.20