Here are 4 sets of numbers: 1{1, 2, 6)
Il {2,4,6
III {1, 2, 5, 6, 7)
IV {10, 11, 12, 13, 14}
For which set(s) of numbers are the mean and the median the same?

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

answer:

a=9

step-by-step explanation: lmk if you need a explanation

step-by-step explanation:

d would equal 12