(x - 5)(5x + 2) = 0 (please help)

What is the quotient of 42/3 divided by 4 1/5

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10