A department store buys 200 shirts at a cost of $3,600 and sells them at a selling price of $20 each. Find the percent markup

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

An octagonal prism has jow many lateral faces?

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15