To create a dental mold, a dentist must add 45 milliliters of water to 100 grams of plaster. how much water should be added to 250 grams of plaster?

What is the value of x in the following equation. -x ^3/2 = -27

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3