A polygon has 20 sides how many diagonals does it have

What is the solution to the equation |2x+3|+5=12

Tim's bank requires its customers to have a 4-digit personal identification number (PIN) to access their accounts.

Vito uses 9 liters of water to water 24 flower pots. He is wondering how many liters of water (w) it would take to water 40 flower pots. He assumes he'll use the same amount of water on each pot.

What's 1 foot below average water level

The area of a square is 17 inches squared what is the length of one side

A bag contains 4 blue and 3 yellow marbles. The marbles are removed from the bag one at a time without replacement. what is the probability that the fifth marble is yellow?

if light travels at around 3*10^8 meters/second. how far does light travel in one minute in scientific notation

Solve this 6r+7=13+7r

Rectangle with length 12.3 centimeters and width of 5 centimeters

What is the of the polynomial? (5X^3+4x^2) - (6x^2-2X-9)