21.8% of what number equals 16,400

7) f (a) = a - 2; Find f (-9)

What is 20 percent of 90?

The sum of two integers is 31 and their difference is 3. Find the integers

Describe a pattern and predict the next number in the pattern

When Jessica multiplied 2x3x15, she touched a key on her calculator 7 times. If she multiplies all the numbers from 3 to 21 (including 3 and 21), how many times will she touch a key on her calculator?

Which set or sets does 0.25 belong in 1. Integers 2. Whole numbers 3. Rational numbers 4. Integers and Rational numbers 5. All of them

A recipe calls for 2/3 cup of sugar for every 1/2 cup of flour. If marshall uses 2 cups of flour, how much sugar should he use?

If A=16 degrees 55' and c=13.7, find a

John read the first 114pages of a novel, which was 3 pages less than, 1/3 of the novel. Write an equation to determine the total number of pages (p) in the novel And Find the total number of pages in the novel.

A tank contains 4000 liters (L) of a solution consisting of 234 kg of salt dissolved in water. Pure water is pumped into the tank at the rate of 9 L/s, and the mixturelong dashkept uniform by stirringlong dashis pumped out at the same rate.