What are the solutions to the equation?

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Nick and nora are married and have three children in college. they have an adjusted gross income of 47,400. if their standard deduction is 12,600 itemized deductions are 14,200 and they get an exemption of 4000 for each adult and each dependent what is their taxable income

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.