Mofor had $21 to spend on two notebooks. After buying them he had $13. How much did each notebook cost?

For finding the circumference of a circle: can an arc determine the circumference of a circle, yes or no

Liz and Elena each participated in the high jump at the track meet with high jumps was one meter Elena's hydrops was 132 centimeters to jump higher how much

What is the circumference and area of a circle with a radius of 40 inches?

Jillian bought 3 4/5 pounds of flour Victoria bought 1 2/3 times as much as Jillian. How many pounds of flour did Victoria buy?

a bank account has $1,000 to start with, and an annual interest of 10%. how many years will it take for the account to be worth $5,000

I thought of a number, divided it by 1 1/2, then added 2 1/2 to the result, then multiplied the sum by 1 2/3. then i subtracted 1 2/3 and got the result 2 5/6. what was my number?

Find the lowest common denominator of and

Last week Bill made a purchase of $56.78 before tax. This week, the same items on sale would have cost him $41.90 before tax. If the tax is 4%, how much could Bill have saved by buying the items on sale (including tax) ?

A student is attempting to simplify the express below. Sample mathematical work is shows. which statement best applies to the sample mathematical work?

Which system of equations has infinitely many solutions?