Simplify 3k^2 + 8.2 - k^2 + 12.6

Explain why 2.15 and - 2.15 are opposites

Sarah started with 50 dollars in her bank account. Each month, she puts 25 more dollars in her account. The amount of money in dollars D in her account is given by D = 25m + 50 where m is the number of months she has added 25 dollars to her account.

What is 10 (h+1) - 4=76 solving for h A.) 7 B.) 4 C.) 76 H.) 10

How do I "express 3m squared in cm squared"?

A set of pencils sells for $1.75 and costs $0.40 to make. Twenty percent of the profit (the different between the purchase price and the amount it costs to make) from each set of pencils goes to a school.

How to find a repeating decimal between 3 fractions?

How many times does 70 go into 1000

The table shows the number of glass bottles of different colors in a shelf. A fair coin is shown below the table.

How can 225% also be expressed as a fraction or mixed number? Express in simplest form.

A truck is rented at $40 per day plus a charge per mile of use. The truck traveled 15 miles in one day, and the total charge was $115. Which equation can be used to the charge x, in dollars, per mile traveled?