If I'm asked to simplify an expression does that mean I shorten it or solve it?

Solve for Y Y/7=21 what is Y

Which expression could be used to solve the problem? Gem counted 54 wheels on 3 semitrucks. The same number of wheels were on each semitruck. How many wheels were on each semitruck? A. 54/3 B. 54 • 3 C. 54 - 3 D. 3 + 54

A water tank that holds 12,000 gallons is leaking at a rate of 24 gallons per hour. There are 8,448 gallons of water in the tank now. Use an equation to find how many hours the tank has been leaking A. 3,552 hours B. 352 hours C. 148 hours D.

What is the surface area of the solid that this net can form? A net has 3 rectangular faces and 2 triangular faces. One rectangle has a base of 13 and height of 5. Another has a base of 12 and height of 5. Another has a base of 5 and height of 5.

A snack bar sells two sizes of snack packs. A merge pack is 5$ and a small pack is 3$. In one day, the snack bar sold 60 snack packs for $220. How many small packs did they sell

3/3 as a whole number

The side length of a square is equal to?

How many km are in a meter

Mary can read 6 pages in 4 minutes how many can she read in 14 minutes?

Which of the following numbers are ordered from least to greatest 1. 1/5,.37,73%, 4/5,.75 2. 7 / 8,.75, 1/2,3 / 8, 1 3. 1/2,. 64, 7/8,.135, 3 4. 4%, 3 / 8, 12 / 24, 70%, 1