13+y = 40

explain how the equal sign is use to balance this equation

List the sets that - 6 belongs to: whole numbers, integers, rational numbers, irrational numbers, and real numbers.

A submarine started 20 feet below sea level. It is now 10 feet below sea level. Which integer represents its change in depth? A 20 B 10 C - 20 D - 10

Is 640 ft greater or smaller than 0.5 miles

Estimates The 22/3-13/8

Write an equation for the inverse variation when y=2 and x=5

A cell phone plan has a monthly cost that is shown in the table below. What is the correct statement regarding the average rate of change during the 40-minute time of talk?

Jay simplified the expression 3 * (3+12:3) - 4. For his first step, he added 3+12 to get 15. What was Jay's error? Find the correct answer

The sum of two consecutive numbers is - 49 what are they

Yummy Cookies just opened a brand new cookie bakery, ans sales are increasing every month! In January, the baker made 14 carrot cake cookies. In February, the baker doubled the January order, took 5 cookies home to his family, and sold the rest.

What is the value of the expression 2 1/2 x + 3 2/3 y (if x = 4 and y = 2)