A 20-foot ladder is used to scale a 16-foot wall. At what angle of elevation must the ladder be situated in order to reach the top of the wall? (round to the nearest tenth)

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 ?

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.