If 90 is 80 percent of the value what is the value

The perimeter of a regular pentagon is 31 cm. find the length of each side.

1. A study is done to see how high soda will erupt when mint candies are dropped into two-liter bottles of soda. You want to compare using one mint candy, five mint candies, and 10 mint candies.

How to find perimeter of a triange? This is for geometry

Who knows what 2739-53617+6 (27183) - 1=

The line segment is rotated 270 degrees counterclockwise about the origin to form R'S'. Which statement describes R'S'?

In a sale, Richard bought a TV for £300. The original price of the TV was £380. What was the percentage discount on the TV?

What is the simplest form of √3025 16 55 5^2 (11^2) 5^2 + (11^2)

Rhonda filled her aquarium with water. Then, she took out 3 gallons to make room for the gravel and fish. She added 2 quarts back in. Then, she added 4 fish. Each fish was in a separate bag with 1 pint of water.

Which pair of ratios can from a true proportion A. 7/4,21/12 B. 6/3, 5/6 C. 7/10, 6/7 D. 3/5, 7/12

Brett fills up his car at a gas station selling gas for $2.10 per gallon. It takes 6 1/2 gallons of gas to fill up the car. How much does Brett spend on gas?