Asystem of equations is given below:

y = –2x + 1
6x + 2y = 22

which of the following steps could be used to solve by substitution?
a. 6x + 2(−2x + 1) = 22
b. −2x + 1 = 6x + 2y
c. 6(−2x + 1) + 2y = 22
d. 6(y = −2x + 1)

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

What is the range for 31,39,29,34,37,24,36,33,34,28

Tessa bought stock in a restaurant for $253.00. her stock is now worth $333.96. what is the percentage increase of the value of tessa's stock? a.) 81% b.) 32% c.) 24% d.) 76%