Raj was given 3 4 of a cake and he ate 3 4 of that part of the cake. how much of the whole cake did he eat? a) 3 8 b) 2 3 c) 9 16 d) he ate the whole cake.

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?