Solve the system of equations by the substitution method. 6x + 2y = 6. - 3x = y + 6

X= 1- y/3

if you want me to solve for y instead then the answer will be,

Y= 3 - 3x

now for the second equation the answer will be,

if you want me to solve for y instead then the answer will be,

Y = - 3x - 6

I hope this helps.

have a great day.

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.

4n=2m

ratio of m to n: 2/4 = 1/2

answer

a. 1/2