A chemist mixed x milliliters of 40% acid solution with some 20% acid solution to produce 100 milliliters of a 27% acid solution. Use this information to fill in the missing information in the table.

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

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?

Which equation represents the function on the graph?