20% of the students purchased their lunch. 180 students brought their lunch from home. How many students are in the sixth grade?

Kim is painting the outside of her house, Joe will charge her $250 plus $14/hr. Bill will charge her $22/hr. How many hours the job should take for Joe's estimate be the cheapest?

Toss a coin three times. what is the probability of getting a head on the first toss

Simplify the ratios 15:35:40

Kerry took out a car loan for $11,000 at 9% simple interest. How much interest would she owe after 1 year if no payments were made?

F (x) = x+2 If you know the domain is {4,12}, then the range must be {, }

Which of the following are solutions to the equation below? x^2-6x+40=6x+5

Malcolm is driving 1,323 miles from Wichita to Charleston for a family reunion. He drives 443 miles the first day and 409 miles the second day. Round each distance to the nearest ten and estimate about how many miles Malcolm has left to drive.

What's an example of an integer word problem in addition?

Each person on a boat ride pays $26 for a ticket. There are 63 passengers. How much money is collected from all the passengers?

Let the random variable x have a discrete uniform distribution on the integers 8 ≤ x ≤ 10. determine the mean, μ, and variance, σ2, of x.