Bill bought 4 pens for $12. which of the following equations shows the relationship between the cost of pens, c, and the number of pens, x, bought? what will the cost of 20 pens be?
question 1 options:
a. c = 3x, $12
b. x = 3c, $60
c. c = 3x, $60
d. x = 3c, $12

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.