Which of the terms cannot be combined with the others?

3a

a

5b

-2a

What is the lowest multiple of both 4 and 6?

If 18 is 45% of a value, what is that value

a new type of pump can drain a certain pool in 6 hours. an older pump can drain the pool in 9 hours. how long will it take both pumps working together to drain the pool?

The National Park Service is building a 16-mile hiking trail. They will post a sign every mile along the trail, including one at the end. There will not bea sign posted at the beginning of the trail. How many signs will they post along the trail?

Piglet measured the rectangle on his paper. Two sides were each 4 inches long. If the perimeter of the rectangle was 30 inches how long was one of the other two sides

You earn $420 per week. You pay social security taxes of 7.65% federal taxes of 22%, and state taxes of 5.95%. What is your take home pay?

A restraunt charges a automatic 20% tip for groups of 6 or more. A group of 8 people had a bill of $187. How much was their tip?

Noah starts with 0 and then adds the number 5 four times. Diego starts with 1 and then multiplies by the number 5 four times. For each expression, decide whether it is equal to Noah's result, Diego's result, or neither. 4 ⋅ 5 4 + 5 4^5 5^4

A truck is carrying a cars weighing an average of 4500 pounds each what is the total weight in tons of cars on the truck

Which number is greater 50% 13/26