If a=5 and b=4, then 2a +b=

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is

How do you write 600 as a product of its prime factors (index! )