The revenue of a company that makes toy cars is modeled by 4x² + 5x - 40. The cost for making the cars can be modeled by 4x2 - 2x + 100. If the profit is the difference of the two
polynomials what is the polynomial that will represent the profit?

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

What is the difference between the equations of a vertical and a horizontal line?