A number x increased by 9 is less than 21.

How many integers are there between, but not including, integers r and s?

A rectangle has a length of 10 inches and a width of 5 inches. If the length is increased by x inches and the width decreased by twice that amount, express the area of the rectangle as a function of x.

Verbal expression of 15 + r

Describe how u can tell whether two quanities are directly proportinal

Round of 27.69 to the nearest whole number

Nia guesses that there are 120 nickels in a jar, but there are actually 125. What was her percent error.

Is 20 miles every 3 hours a unit rate

Plot the fraction 7/12 on the number line. is 7/12 closer to 0, 1/2 or 1?

Which of the following steps would be most useful in proving that a circle with a radius of 3 inches is similar to a circle with a radius of 2 feet?

Write the fraction in simplest form 25/100