Isi makes sandwiches to sell at a football game. The graph shows her costs and income from making and selling the sandwiches.

Select the three statements that are true, based on the graph.

A graph has number of sandwiches on the x-axis, and amount (dollars) on the y-axis. A line labeled income goes through (0, 0) and (24, 12). A line labeled costs starts at a point above (0, 0) and goes through (24, 12).

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?