The diagram shows a part of a regular 10 sided polygon
work out the size of the angle marked x

Find the value of the cosine for angle a

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?