Beth solved the system of equations by making a substitution for y in the second equation. what equation did she get as a result of that substitution? y = 4x – 11 3x + 5y = –9 12x – 11 = –9 12x – 55 = –9 3x + 20x – 55 = –9 3x + 20x – 11 = –9

The salesperson earns a 5% commission on the first $5,000 she has in sales. the salesperson earns a 7.5% commission on the amount of her sales that are greater than $5,000. this month the sales person had $8,000 in sales. what amount of commission, in dollars, did she earn?