The cost of 5 cans of dog food is $4.35. At this price ,how much do 11 cans of dog food cost? Explain your reasoning.

First, you would need to calculate the cost for one can of dog food, the equation below represents that. 
$4.35 ÷ 5 = $0.87

Now, all you would need to do is multiply the cost per can by the total number of cans. 
$0.87 × 11 = $9.57

At the price of $0.87 per can, it would cost $9.57 for 11 cans of dog food. 

I hope this helps!