The temperature was 65 degrees at daybreak. then it dropped two degrees per hour until dusk. this decrease in temperature can be modeled by the equation, y = -2x + 65. using the model, what is the temperature 6 hours after daybreak? 77 67 57 53

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?