You receive a raise in your hourly pay from $8.25 per hour to $9.25 per hour. What percent increase in pay does this represent? (Round your answer to two decimal places.)

12.12%

Step-by-step explanation:

$9.25 - $8.25 = $1

ie; $1/$8.25 = 0.121212121 × 100%

= 12.12%

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