5. Mark earns a weekly salary plus a commission on sales. One week his income on sales of $4000 was $660. The next week his income on sales of $6000 was $740. Find his weekly salary and his commission rate.

Question

5.	Mark earns a weekly salary plus a commission on sales.  One week his income on sales of $4000 was $660.  The next week his income on sales of $6000 was $740.  Find his weekly salary and his commission rate.

anonymous · Answer

let mark's weekly salary be X. The commission he gets is just going to be a percentage of his income on sales so let's make that percentage Y. Then you end up with a system of 2 equations
X+4000Y=660    and
X+6000Y=740

anonymous · Answer

so what's his salary and commission

anonymous · Answer

solve for x and y.