Simplify: 3r+n²-r+5-2n+2

How much larger is a gallon than a quart?

David can type 90 words a minute. How many words can be typed in 9.5 minutes?

what time will it be eight minutes and twenty five seconds after eleven fifty one and thirty five seconds?

two cars start from the same place traveling in opposite directions the first car travels 10 miles per hour faster than the second car in 3 hours the cars are 270 miles apart what is the rate of the second car

Sally Harris, a young mother, is twenty six years old. She wishes to purchase $15,000 of a ten year term insurance. What will be her annual premium

John puts the letters of the word science on pieces of paper and puts the pieces in a bag. he draws two letters without looking. the first piece of paper is not replaced before the second piece is drawn.

Evaluate f (-2) when f (x) = 5x + 3

Round 706,341 to the nearest hundred

Leonardo da vinci's mona lisa is 21 inches wide and 30.25 inches tall. what is the area of the painting in square centimeters?

How many grains of sand in a 10kg bag if one grain weighs 10 to the negative third gram