The document discusses the salaries and commission structures for three professions: - A real estate broker earns a $18,000 base salary plus 4% commission on total sales, as calculated using a linear equation showing total income of $55,000. - An automotive engineer uses trigonometric equations to determine when pistons reach the same height during testing. - An accountant uses polynomials and algebra to calculate profits by subtracting total costs from revenue, determined by multiplying price and number of units sold.

1. Total income= Base salary+ commission * total sale Total income $55,000 Base salary=18,000 Commission=0.04 55,000= 18,000+0.04x 37,000=0.04x 925,000=x Real Estate Broker Real estate broker have an average salary of $18,000. they earn 4% of the sales commission. Brokers deal with lots of linear equations and lots of algebra equations. To figure out how much a broker is going to make they set it out like this