If the mean of four numbers 2,4,x, and 6 is 5, then x is...​

4 numbers, mean of 5.

4x5= 20. so the total of all 4 numbers is 20.

2+4+6= 12

so in order for the total to be 20, the missing number has

to be 8 (20-12=8)

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: