Richard paid six times as much for his computer as he did for his printer. He paid a total of $1680 for both items. What did each item cost? The printer costs (?)$ and the computer costs (?)$​

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

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 ?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}