What is the value of a in the equation 3a+b = 54, when b = 9?
15
18
21
27

Volume of a cylinder with a radius of 13 in and height of 30 in

Find the greatest common factor of the polynomial: 10x^5+15x^4-25x^3 10x^5 x^3 5x^3 5

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