You are interested in the effects of sleep deprivation on self regulation. You take a group of 150 people and measure how many cookies they eat while you interview them once when sleep-deprived and once when fully rested. You do a paired-samples t-test to analyze the data. You have degrees of freedom.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

really really sorry if i'm

-12 -5(x + 4) = 3x

-12 - 5x - 20 = 3x

-12 - 20 - 5x = 3x

-32 - 5x = 3x

    + 5x   + 5x

-32 = 8x

8         8

- 4= x