How to factor this expression?

David can finish painting the room in 6 hours, and his elder brother Antony can finish it in 4 hours. If both brothers paint the room together, how many hours will it take them?

Simplify the following expression. 5.3x - 8.14 + 3.6x + 9.8

Cooper ate 3/4 of a pizza. If there were 8 slices of pizza, how many slices did Cooper eat?

What multiplys to be 1 but adds up to be 4

Kenny mowed a lawn today to earn some extra money. He spent $1.40 on fuel and $3.25 on lunch. He charged $15 to mow the lawn. What was his profit for mowing the lawn? $

2/9 divided by 4 what is the answer

A slice is made perpendicular to the base of a right rectangular prism as shown. What is the area of the resulting two-dimensional cross-section? Drag and drop the answer into the box.

An air conditioning fan makes 125 revolutions per second, how many revolutions will it make if it runs for 30 minutes?

Which of the following expressions are factors of 25x^3-75x^2-9x+27? There may be more than one correct answer. Select all correct answers. a. 5x+3 b. x+3 c. x-3 d. x^2-3x+9 e. x^2+6x+9 f. 5x-3

N Florida, the number of alcohol-related traffic deaths increased in 2009 compared to 2008.