How to simplify x + 4 - 5x - 2?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?