there are 400 seats in the jefferson middle school auditorium. the student are using 3/5 of the seat. there are 65 seat being used by teacher. how many seats are NOT being used in the auditorium?

The perimeter of a rectangle is 42 inches the length of the rectangle is 3 inches more then twice the width what is the size of rectangle

1) A lake near the Arctic Circle is covered by a 2-meter-thick sheet of ice during the cold winter months. When spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate modeled by h (t) = 2 - 0.

Stanford university's soccer field had an area of 8800 square yards. It's length is 30 yards longer than its width. Suppose a groundskeeper decides that he had enough chalk to line 600 feet of the perimeter of the field.

As a farmer, one of your responsibilities is to plow the field to prepare it for planting. On day 1, you plowed of the field. On day 2, you plowed of the field. How much more of the field did you plow on day 1 than on day 2?

Proportions: An airplane boards 16 people every 3 minutes How long would it take to board all 150 passengers?

Evaluate this expression: |-2.3|

Rafael earned a salary of 34,944 last year. How much did he earn per month? A.$416 B.$4992 C.$672 D.$2912

What is the solution to the quadratic equation? y = x^2-4

Sunny earns $12 per hour delivering cakes. She worked for x hours this week. Unfortunately, she was charged $15 for a late delivery on Tuesday. How much money did Sunny earn this weekend?

One track coach wants her athletes to race 2 miles around a track to measure how fast each person can run? If the track is 2/3 of a mile around, then how many laps around the track will athletes have to run to complete the race?