Arianna has $0.70 worth of nickels and dimes. She has 4 more dimes than nickels. By following the steps below, determine the number of nickels, x, x, and the number of dimes, y, y, that Arianna has. Determine three ways to have 4 more dimes than nickels:

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

the answer is mp

step-by-step explanation:

493 would be the correct answer

step-by-step explanation: