Select ALL the correct answers. Select all the expressions that are equivalent to the polynomial below. (3x-7)(2x+8) (3x2 + 5x − 28) − (2x2 + 4x + 28) (3x2 + 5x − 28) + (3x2 + 5x − 28) 4(x − 4) − 2(3x2 + 3x − 20) (11x2 + 7x − 55) − (5x2 − 3x + 1) (11x2 + 7x − 55) + (5x2 − 3x + 1) 4(x − 4) + 2(3x2 + 3x − 20)

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?