Write an expression for the sum of a and four

8x + 9y = 21 7x+4y=-1 Solve for x and y

Walter has 1/4 of a yard of string. He used 3/5 of it on a school project. How much string did he use?

What are two consecutive odd integers that sum 160

The area of a rectangle is found by multiplying its length times it's with. What is the area of the rectangle with a lenghtof 2 1/4 inches and a width of 1 5/9 inches

The temperature has been going down at a constant rate. in 44 hours it went down 1212 degrees. which expression best shows the temperature change each hour?

You need to be taller than 48" to ride the roller coaster. Which of the following inequalities shows the height Susan has to be to ride the roller coaster. h < 48" h > 48" h ≤ 48" h ≥ 48"

Aldo wants to install a skylight in the roof of his house. The base of the skylight is a regular hexagon with side length 40 cm. What is the perimeter of the base of the skylight? Give your answer in metres. Which strategy did you use to find out?

What is the LCM of 90 and 270?

How can you use models to explain why 3.1=3.10?

Scientific notation for 82,300,000