CAN SOMEONE PLEASE HELP ME!!

Describe the relationship between the angles of similar triangles and the sides of similar triangles

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?