Can you please help solve this equation

The voter percentage declined on average by 1.025% per year.

Step-by-step explanation:

The difference in years between 1992 and 2000 is 8 years, and the voter percentage declined 8.2% within those eight years. So, if you are looking for the average yearly rate of change, you can divide -8.2 by 8 to see how much the voter percentage declined on average per year. (At least that is what I think the problem is asking) I hope this helps!

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