What is an expression for the spending money you have left after depositing one fourth of your wages in savings

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 length of the diagonal of the rectangle. round your answer to the nearest tenth. || | | 8 m | | | | 11 m

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.