Students are selling grapefruits and nuts for a fundraiser. The grapefruits cost $1 each and a bag of nuts costs $5 each. They sold 80 items and made $200. The graph of the number of items sold is given and the equation is x+y=80, where x represents the number of grapefruits sold and y represents the number of bags of nuts sold. Pls help thx:)

Factor this polynomial completely x^2-64

Place the following steps in order to complete the square and solve the quadratic equation,

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212