Please help on timer ill give 15 brainlist

the answer to your question a or b but i am pretty sure it is b. i hope this : )

step-by-step explanation:

5x+10 is the correct one

hope this

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.