Melody buys a skateboard that costs $79.81 and a helmet that cost $26.41 she uses a 45% off coupon on the purchase if melody pays with a $100 bill about how much she and she she get back?

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations

33 ! use the following data to determine the type of function (linear, quadratic, exponential) that best fits the data set. (1, 2) (5, 7) (9, 8) (3, 4) (4, 5) (2, 3)

Marco states that 7.696696669…… is a rational number because it is a repeating decimal. is he correct? justify your answer.