In the diagram shown, parallelogram LMNP is shown. diagonal MP is drawn and contains points R and S such that LR is perpendicular to MP and NS is perpendicular to MP. prove that RM = SP. Can someone please tell me what are the statements and reasons for that.

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?