A branch of mathematics that uses variables is called?

Gabe Amodeo, a nuclear physicist, needs 60 liters of a 60% acid solution. He currently has a 40% solution and a 70% solution. How many liters of each does he need to make the needed 60 liters of 60% acid solution?

A gardener is laying down sod (grass) at a newly built house. The rectangular front yard measures 52.1 ft by 26.4 ft. Each order of sod covers 500 square feet. How many orders of sod does the gardener need to buy to cover the entire front yard?

Rick serves his community as a firefighter. he works for a full 24 hours and then is off forbthe next 48 hours before his next 24-hour shift. last month, he earned $3,740.88, before taxes, and worked eleven 24-hour shifts.

Jose' is putting up wallpaper is $1.75 per square foot. one wall measures 10 by 9 feet. how much will wallpaper cost for this wall?

A_ of 4 is any product that has 4 as one of it's factors

A box making machine makes cardboard boxes at a rate of 40 boxes per minute. How many minutes does it take to make 360 boxes?

Expanding brackets x (4x-1)

Change 1 14 / 15 into percentage

If you were to roll the dice one time what is the probability it will land on 4

Bruce has a job that pays 92,000 per year. How much will she pay in social security taxes? (Social security taxes are 6.2% of earnings)