Sarah baby-sat 7 times as many hours during summer break as she did during spring break. She baby-sat a total of 56 hours during both breaks. How many hours did Sarah baby-sit during spring break?

The temperature at 4AM was-4C and at 7am 3C higher. What was the temperature at 5 am

A total of $12,000 is invested at two different rates: $5,000 of it is invested at 6%, and the rest is invested at 8%. How much total interest is earned at the end of one year?

A rectangle made of square tiles measures 7 tiles long and 3 tiles wide. what is the length of a similar rectangle whose width is 9 tiles

Evaluate the expression. 9! - 5!

How do i check basic equations

A certain shampoo is available in two sizes. A 23.7-ounce bottle costs $4.97. A 33.8 - ounce bottle costs $7.48. Find the unit price for each size. Then state which size is the better buy based on the unit price.

9.086-2.419 to the nearest one

What is the answer to this56:98

An item costs $420 before tax, and the sales tax is $12.60. Find the sales tax rate. Write your answer as a percentage.

Simplify using the horizontal method (2n^2+5n+5) (2n-4)