217 is what percent of 620

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

Nine more than four times a number is the same as one less than twice the number. find the number?

Which graph represents the parent function of y=(x+2)(x-2)