Solve using the substitution method - 7x+y = 42 and 5x+13y = 66

Carla packs 4 boxes of books. Each box has 9 books. How many books does Carla pack?

If a computer costs 800 dollars and it loses a quarter of its value each year after it is purchased, what is an equation to represent this

6 sided die was rolled 9 times what is the mode of these rolls 4 5 1 2 4 3 6 2 4

The population in a particular country is growing at the rate of 1.9% per year. If 5,092,000 people lived there in 1999, how many will there be in the year 2006? Round to the nearest ten-thousand.

Graph the equation x+3.5y=7

Josef ate 1/4 a pizza in 1/2 an hour. How much pizza would Josef eat in one hour?

What is the product of - 3 and 5?

an equilateral is a 3-sided plygon in which all sides have the same length. Write a formula for the perimeter, P, of an equilateral triangle whos perimeter is 72 inches.

Doubling the some of Steve's and pams ages gives 38 if Pam is 10 years old how old is Steve

A 36 - foot-long rope is cut into three pieces. The first piece of ribbon is half as long as the second piece of ribbon. The third piece is 1 foot longer than twice the length of the second piece of ribbon. How long is the longest piece of ribbon?