Belle put the muffins she baked on six plates, four of which are red and two of which are yellow. the four red plates each have 5 muffins. the two yellow plates each have the same number of muffins. write an expression for the total number of muffins belle baked. if each yellow plate has 8 muffins, find how many muffins belle baked in all. explain

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?