Choose the operation. in one week, ty bought gas on monday, tuesday, and saturday. how many days did ty not buy gas during that week?
subtract, add, divide, multiply

Subtraction.

Step-by-step explanation:

There are seven days in a week. Subtract, (take away) the amount of days Ty bought gasoline, and you now have the answer.

He did not buy gasoline on four days of the week.

- Hope this helps, good luck.

Consider this option:
way_1: using points (1;10) and (-3;2) it is possible to make up the equation of the line. It is y=2x+8. Then using the form 'y=2x+8' it is possible to compare and find the answers needed: C; D.
way_2. using points of interception (-4;0) and  (0;8) it is possible to substitute into every answer (if the left part = the right part, then this answer is correct, otherwise not correct). C; D,
way_3: using points (1;10) and (-3;2) it is possible to substitute into every answer (if the left part = the right part, then this answer is correct). C; D.

C and D.