10. Victoria has a coupon for 30% off of any item in a department store. She decides to purchase a treadmill. The original price of the treadmill is $595. There is also 7% sales tax in her state. What is the final price of the treadmill, including tax? *

Step-by-step explanation:

Original price $595.00

Discount amount 595(0.30) = $178.50

Pre tax price 595.00 - 178.50 = $416.50

tax amount 416.50(0.07) = 29.155 = $29.16

cost to Victoria 416.50 + 29.16 = $445.66

you would need to know all the numbers that are on there

step-by-step explanation:

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