a function is shown where b is a real number.
f(x) = x^2 + bx + 144
the minimum value of the function is 80.
create an equation for an equivalent function in the form f(x) = (x - h)^2 + k

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?