Evaluate the expression when a=9.

2a2

A swimming pool is drained at the end of each summer. Fifteen gallons of water are removed per minute. How much does the amount of water in the pool change in one hour? (There are 60 minutes in one hour.)

Find the area of a sector with a central angle of 32° and a radius of 8.5 millimeters. Round to the nearest tenth. A. 40.4 mm² B. 2.4 mm² C. 20.2 mm² D. 9.5 mm²

Which expression does NOT have a value of 18?

How do i change 2x+3y=1470 to slope intercept format

The perimeter of a standard football field, including end zone is 1040 feet. if the field is 360 feet long, how wide is the field

What's m2-5m-14=0 solved using the quadratic formula?

The O'Malley family is driving cross-country to see their cousins. So far, they have traveled 275 miles. This is 1/5 of the way to their cousins' house. How far do the O'Malleys live from their cousins?

a restaurant chain ordered 3940 pounds of rice in 20 lb bags about how many 20 lb bag of rice did the chain order

Let f (x) = 2x2 - 9x and g (x) = - 5x2 + 4x. Find f (x) - g (x).

Roll two 6-sided dice and examine their sum. a) How long will it take to roll "snake-eyes" (a pair of ones) ? b) What is the probability of rolling a sum of 7 on the first roll? c) What is the probability of rolling a sum of 7 on the fourth roll?