Simplify 3 square root of 10 end root plus 7 square root of 15 end root minus 6 square root of 10 end root minus 4 square root of 15 . (1 point) 3 square root of 10 end root minus 3 square root of 15 3 square root of 15 end root minus 3 square root of 10 3 square root of 30 end root minus 3 square root of 20 3 square root of 20 end root minus 3 square root of 30

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?