There were 7 1/2 tubs of icecrem. a serving of icecrem is 1/6 of tub. how many servings of icecrem remains?

Let's see, get a improper fraction okay? 7*1/2 is? 15/2 then do

15       6          90        
---   X --- =       =     45
 2          1          2           
 Well you know that  when you divide you switch the second row to a flip then get the numerator as the denominator.So yeah instead of a divide sign you multiply so yeah.

C. i believe it is (5×(-20))+(100×(0.7))