Which of the following expressions can you multiply using the FOIL Method? Check all that apply. Please Hurry. 50 points!! 1. (x+a)(x-b)
2. x(7x^2+3x-5)
3. (3x-2)(x+4)
4.(x-4)(x^2+2x-1)

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?