How to write an equivalent expression for n times a using only addition

What is the volume of a cone with the same radius and height as the cylinder?

Bobby spent 122 minutes on school work the first week, but only spent 109 minutes on school work the second week.

It takes 3 hours to paint 2 walls. How long does it take to paint 5 walls at the same rate

7+y (3+y) ^2 while y is - 5

What is the product of 4/5*2/3? Draw a model to support your answer. Explain how the model shows the product.

A box of fruit has four more apples than oranges. together there are 52 pieces of fruit. how many of fruit are there

two angles of a pentagon are 58 degrees and 83 degrees respectively the other three angles are in the ratio of 5:6:8 find the value of the largest angle

A cube has a side length of 20 in. find the volume.

Which decimal is equal to 2/5 0.6 0.15 0.2 0.3 0.4

At the end of one day, the value of a share of a certain stock was $12. Over the next three days, the change in the value of the share was $-1, then, $-1, and then $3. Write an expression that descrines the situation.