A computer store bought a program at a cost of $20 and sold it at a selling price of $22 find the percent markup

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Complete the steps to find 4.830 ÷ 5

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?