What is the simplified form of each expression?

1.7m + 6.5n - 4n + 2. rn^2 - n

A test driver has to drive a car on a 1-mile track for two rounds in a way, that his average speed is 60 mph. On his first round his average speed is 40 mph. How fast does he need to drive, to get the right speed average?

Dan bought 6 boxes of candy for his teachers at holiday time. If he spent $41.70, how much did each box cost? (With equation)

The difference of a number x and 1/2

If a puppy gains eight pounds between veterinarian checkups, what has it gained? The puppy gained mass only. The puppy gained weight only. The puppy gained mass and weight. The puppy gained neither mass or weight.

Y=2x+8 Find x, if y is 10

A car passes a landmark on a highway traveling at a constant rate of 50 kilometers per hour. One hour later, a second car passes the same landmark traveling in the same direction at 70 kilometers per hour.

Which is more 1 pound or 13 ounces?

Prestige Builders has a development of new homes. There are four different floor plans, seven exterior colors, and an option of either a two-car or a three-car garage. How many choices are there for one home?. A. 34. B. 96. C. 64. D. 56

What is the 30% of 67,500.00

The area of a rectangle is 180 squared in2. The ratio of the length to the width is 5 : 4Find the length and the width. The length of the rectangle is nothing in.