Assume that Q, R, and S are the angles of a triangle, with opposite sides q, r, and s respectively. Select all of the following that represent the law of cosines. q2 = r2 + s2 – 2rscos(Q)

q2 = r2 + s2 – 2qscos(R)

r2 = q2 + s2 – 2qscos(Q)

r2 = q2 + s2 – 2qscos(R)

s2 = q2 + r2 – 2qrcos(S)

The first hexagon is dilated to form the second hexagon select the answers from the drop box menus to correctly complete the statement

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.

How do you use the elimination method for this question? explain, because i really want to understand!