Find the sum of the interior angle measures of a convex 21-gon

The account charged $35 for the first hour of work and $23 for each hour after that. He earned a total of $127 How many hours did he work?

A machine prints 8 banners in 120 seconds. How many seconds does it take to print one banner?

A window cleaner charges a call out fee of £3 plus 25p per square metre of glass cleaned. a front window in a butcher's shop measures 3.5 m by 6 m. how much does it cost to get 2 of these windows cleaned?

During the summer, Cassandra's parents allow her to work to earn some spending money. However, they do not want her to work more than 40 hours a week.

If a coin is tossed seven times, what is the probability of it landing on heads each Time time?

What is 11 increased by 12%

What's 624 divided by 27 showing the work?

The base of a parallelogram is 1.4 feet long, and the height is 0.32 feet. What is the area of the parallelogram?

What is the area of the larger triangle? __ square units

Nicole has a board 88 in. long. she needs to to cut it into filt a space 80 3/8 in long