Twin brothers, Billy and Bobby, can mow their grandparent's lawn together in 111 minutes. Billy could mow the lawn by himself in 20 minutes less time that it would take Bobby. How long would it take Bobby to mow the lawn
by himself?

it took bobby 91 minutes to mow the lawn

Step-by-step explanation:

111-20=91

you have to put the graph on here with the question

step-by-step explanation:

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.