Two mechanics worked on a car. the first mechanic charged 105 per hour, and the second mechanic charged 75 per hour. the mechanics worked for a combined total of 25 hours, and together they charged a total of 2175 . how long did each mechanic work?

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work: