Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
21 and 22 are supplementary angles. m/1 is 4y + 7, and m/2 is 9y+ 4. Find m/2
since they are supplementary,
4y+7 + 9y+4 = 180
solve for y, and then you can get the angles' measures.