Answer each question below. 7. Solve for x in terms of a in X 2 by cross-multiplying. (64) atx 8. Find the measure of the angles of an isosceles triangle where the ratio of the vertex angle to one of the base (63) angles is 4:3. 9. Assume AAMR~ABNS . If the perimeter of AAMR is 20, the perimeter of ABNS is 30, AM = x +1, and (71) BN = 3x, find AM and BN. 10. Assume AEFG~AXYZ with medians FR and YS to sides EG and XZ respectively, FG =12, and (71) YZ = 18. If FR is 1 less than YS, find both medians