A branch of mathematics that uses variables is called?

What is the value of y in 3/4y - 12 = 12

What is the area of an equilateral triangle with radius 15 centimeters? Round your answers to the nearest tenth, if necessary.

A contractor needs to buy nails to build a house. The nails come in small boxes and large boxes. Each small box has 50 nails and each large box has 400 nails.

Order these fractions from leadt to greatest; 2/3, 7/12, 3/4

One serving of oatmeal provides 16% of fiber you need daily. you must get the remaining 21 grams of fiber from other resources. how many grams of fiber should you consume daily?

How do you solve 4y^-3-x^2y^-1?

A species' population dropped from 2000 in the year 2000 to 1200in the year 2011. Find the percent decrease in its population

How many solutions are there in the equation below 8x+11=8x+8

A gym teacher has $250 to spend on volleyball equipment. She buys 4 volleyball nets for $28 each. Volleyball cost $7 each. How many volleyball can she buy?

If f (x) is a third degree polynomial function and g (x) = f (2x) + 2, which of the following must be true? f (x) and g (x) have the same x-intercepts. f (x) and g (x) have the same y-intercepts. f (x) and g (x) have the same number of zeros.