Answer:
Third option or Answer C
Step-by-step explanation:
Since the triangles are congruent, we know each side in triangle STR is equal to each side in triangle XYZ. So we set equal the two expressions.
14c-13=10c-1
----> Our goal is to solve for c by isolating it. We begin using the inverse to move -13 across the equal sign. We will do the same for 10c. Then divide by the coefficient to find c.
14c-13=10c-1
14c-13+13=10c-1+13
14c=10c+12
14c-10c=10c-10c+12
4c=12
c=3.
---->To find TR, we substitute c=3 into 14c-13.
14(3)-13
42-13=29.
Our answer is c=3 and TR=29.
