F(x)= -x^2, Find f(3)

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Find the solution(s) to x^2-14+49=0