Mike saves $42 a week for 7 weeks. during his 8-day vacation, he plans to spend $8.25 each day for snacks. which expression shows how much money he will have left? a) (42÷7)−(8⋅8.25) b) (42⋅7)−(8⋅8.25) c) (42⋅7)+(8⋅8.25) d) 42⋅7⋅8⋅8.25

The price of a box of 15 cloud markers is $12.70. the price of a box of 42 cloud markers is $31.60. all prices are without tax, and the price of the packaging is the same for any size. how much would 50 cloud markers in a box cost? write an equation which will tell the price p for the number n markers in the box.