Solve the system by substitution.

--y = 2

3x + 5y = 20

Moving at its top speed a sloth would take 20 hours to go 3 miles on land. What's that in miles per hour

Selena rides her bicycle to work. It takes her 15 minutes to go 3 miles. If she continues at the same rate, how long will it take her to go

A high school debate team is made up of 9 boys and 7 girls. Their coach is going to choose four of them to go to a competition. 1) In how many different ways can the coach choose 3 girls and 1 boy to go?

Simplify the expression. Write the answer in scientific notation 1.) 8 (8.8x10^12) 2.) 0.9 (4.1x10^-6)

a store has 27 two six packs 15 12 packs and 34 single cans of soda write an expression using the numbers 27 6:15 12 and 34 to show how many cans of store has all together

Write two decimals that can be rounded to 1.5

Eight hundred thousand, six hundred twenty four in number form

Marcy bought 10.32 pounds of white potatoes and 12.48 pounds of sweet potatoes. About how many pounds of potatoes did Marcy buy? Round each weight to the nearest tenth to estimate the total weight of potatoes that Marcy bought.

Let X = {5, 10, 15, 20, 25, 30, 35, 40}. Define a relation on X as follows. For a, b is in X, a b if b can be obtained from a by adding a (possibly empty) collection of dimes (10 cents) and quarters (25 cents). So, for example, 25 35, but 25 30.

Lindell ran 5 kilometers in 25 minutes. How fast did he run in miles per hour?