Answer:
Simple interest is one of the most basic ways to calculate how much financing will cost you or how much you can earn on an investment. Check out our simple interest calculator to find out what you will pay or earn over time.
Step-by-step explanation: sorry lol
7+7+7=21 is the same as saying 7 times 3+
=21
This is false... you can get an easy example: (-2) + (10) = 10 - 2 = 8