Observe as retas horizontais que sao as linhas de uma partitura . essas cinco retas sao​

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

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

:)i need to know on which ones are corresponding, alternate interior, alternate exterior, or none of these.