The soccer team is planning to sell health bars for a fundraiser. the prices of purchasing health bars from two different companies are represented by the system of equations shown, where x is the number of bars purchased and y is the total cost in dollars. company a: y = 0.75x. company b: y = 10 + 0.50x. how many bars would the team need to purchase from each company in order for the total cost to be equal?

Solve the system of equations. y= 2x y= x^2 - 15

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function.a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.