What is the common difference in the arithmic sequence 30,27,24,21,18

Jack invests $500 at a certain annual Interest rate, and he invests another $2000 at an annual rate that is one-half percent higher. If he receives a total of $210 Interest in 1 year, at what rate is the $500 Invested?

A shed with a pent roof need to have some new roof beams fitted

David and Terri drove a small motorboat down a river with the current. The rate the boat traveled in still water was r miles per hour, and the current's average speed was c miles per hour. It took them 1.5 hours to travel 4 miles downstream.

A speed limit of 65 mph

To simplify5 (2x-7) use distributive property

To use the two sample t procedure to perform a significance test on the difference of two means, we assume: a) The populations' standard deviation are known. b) The samples from each population are independent. c) The sample sizes are large.

The USA won 15 Wimbledon championships. Sweden and Switzerland both won 7. Australia won 6, German won 4, and Spain won 2. Write the Ratio that compares the championships won by Australia to the total number of championships. Explain it's meaning.

How many solution does x^2=4x-5 have

Leonard used 2/7 of his paycheck

Write two numbers that are multilied together to get to 75 but are added together to get 10?