Solve 5a           = 25             7 the solution is a pl i do not understand

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 three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges

Which geometric principle is used to justify the construction below?