At noon, a tank contained 10 cm of water. after several hours, it contained 7 cm of water. what is the percent decrease of water in the tank?

Agroup of students want to create a garden. they do not know the exact measurements but they propose using a variable to represent the length and width of the garden. the length of the garden is 10 feet longer than double the width. use a single variable to write algebraic expressions for both the length and width of the garden. write an algebraic expression for the area of the garden. use mathematical terms to describe this expression.

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?