A teacher has 21 red pens if the ratio of red pens to blue pens she owned was 3:1 how many pens did she have in total

The area of a triangle is 10 square inches and its height is 5 inches. find the base. 2 in. 4 in. 25 in.

Pia built a rectangular prism with cubes. The base of her prism has 12 cm cubes. If the prism was built with 120 cm cubes, what is the height of her prism?

The radius of a sphere is increasing at a rate of 3 mm/s. how fast is the volume of the sphere increasing when the diameter is 10 mm?

Marcus passed a football 24yd. Convert the pass length to meters. Round to one decimal place

How many hours are in 3 years

a car has 15 gallons of gas in its tank the car travels 35 miles per gallon of gas how much gas does the car used to go 100 miles

Identify all factors of the expression 4x^2+17x-15 a. 2 b. 3 c. x - 5 d. x + 5 e. 4x - 3 f. 4x + 3

Factor out the common terms 6m - 21p

local bank employs 36 individuals of which 15 are smokers. What is the ratio, in simplest form, of the non-smokers to the total number of employees at the local bank?

Peter buys a small wind turbine for use on his farm. It generates 13,000 kWh of electricity in the first year. He uses 7,570 kWh of electricity and sells the remaining kWh to his energy suppliers. He receives £412.68 for the electricity he sells.