How many milliliters of a 12% alcohol solution and how many milliliters of a 30% alcohol solution must be mixed to obtain 72 ml of a 20% alcohol solution?

4 (x - b) = x a. b = 4/3 x b. b = 3/4 x c. x = 4/3 b d. 3/4b

A cable company charged a one time installation fee and a monthly service charge. The total cost is modeled by the function y=40+90x. Describe the meaning as of each part of the function

shen just bought 7 bags of 14 cookies each. he already had 9 cookies in a jar. how many cookies does shen have now?

naveah's mother is two times older than two years less than naveah's age. write an expression for the age of naveah's mother using n to represent naveahs age

Let's investigate the results of the random assignment of the fertilizer types to the plots. 12. On the diagram above, draw a vertical line down the center of the 16 plots of land.

Melissa has a can of spray paint that covers about 6,500 square centimeters. Can Melissa apply two coats of paint to the entire sculpture? Explain. use 3.14 irrational

7th Grade Mathematics When a person uses an iron to remove the wrinkles from a shirt, why does heat travel from the iron to the shirt? A.) heat travels from objects of lower temperature to higher temperature B.) heat travels to objects below it C.

Brittany works 21.5 hours a week. If she earns $8.50 per hour, how much does she earn in one week?

A percent measures a rate O per unit O per 10 units O per 100 units O per 1,000 units

Celestial object A is composed of 92.1 percent hydrogen and 7.8 percent helium while celestial object B is made up of ice, frozen carbon dioxide, rock and dust what is celestial object A