2x+2y=38
y=x+3 fddfdffddfdfdf

x = 8 and y = 11

Step-by-step explanation:

2x + 2(x + 3) = 38       Substitute the second equation for y

2x + 2x + 6 = 38         Combine like terms

4x + 6 = 38

    - 6      - 6                Subtract 6 from both sides

4x = 32                       Divide both sides by 4

x = 8

Plug this into the second equation

y = x + 3

y = 8 + 3                      Add

y = 11

If this answer is correct, please make me Brainliest!

irst, find the z score of a score of 80. this is given by the formula z = (x-u)/o, where x is the score, u is the mean, and o is the standard deviation. this gives

z = (80-78)/12 = 1/6 = .1667

now, find what percentile a z score of 1/6 correlates to in the normal distribution.

a z score of 1/6 = .1667 is equivalent to the 56.36th percentile of the distribution. so the probability a score is over this is 1-.5636 = .4364

the mean of a sample mean is equal to the original mean. however, the standard deviation of a sample mean is equal to the original standard deviation divided by the square root of n (sample size). so the new standard deviation is 12/sqrt(16) = 3.

the new z score is 80-78/3 = 2/3 = .667. this is equivalent to the 74.86th percentile. so the probability that the mean will be greater than this score is 1-.7486 = .2514.