Alberto earns a weekly salary of $500 plus 20% of his sales volume. Write an equation describing the total weekly earnings for x dollars in sales.
A) $y = 20 x + 500$
B) $y = 500 x + 20$
C) $y = 0.2 x + 500$
D) $y = - 20 x + 500$
E) $y = 0.02 x + 500$

Question

Quizplus · Accepted Answer

The equation for Alberto's total weekly earnings is y = 0.2x + 500, where x is the sales volume. This is because he earns 20% of his sales volume, which can be represented as 0.2x, and he also earns a weekly salary of $500. Option A is incorrect because it has the 20 multiplied by x instead of 0.2. Option B is incorrect because it has the salary added to the 20% of sales, instead of the other way around. Option D is incorrect because it has a negative sign in front of the 20x. Option E is incorrect because it has the decimal point in the wrong place; it should be 0.2, not 0.02.

Alberto Earns a Weekly Salary of $500 Plus 20% of His