What is the sum of the measures of the interior angles of a 12-gon ? A: 1620

B: 1800

C: 1980

D: 2160

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 ?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?