If Valerie has a shoe business and bought a pair of shoes for $50 and wanted to mark them up by 80%, what price is she selling the shoes for?

She will sell the shoes for 90 dollars

Step-by-step explanation:

First find the markup

50 * 80%

50 *.8

40

Add this to the original price

50+40 = 90

She will sell the shoes for 90 dollars

step-by-step explanation: noo

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