Stevens Market is selling 3 packs of toothpicks for $0.87. How much will 10 packsof toothpicks cost at this price? Round your answer to the nearest cent.

Question

Pre algebra help

Answer 1

Gina's answer is correct.

We can also set it up as a ratio:

      (Original number of packs)/Original cost of those packs)  =  (New number of packs)/(New cost)

In this problem, that would be:

           3/0.87  =  10/x     (where x is the cost of 10 packs)

Cross-multiplying, we get:

     3x  =  8.70

        x  =  2.90

Answer 2

Let x be the number of packs of toothpicks.

We can re-write this as: 3x = 0.87.

We can then solve for x by dividing both sides by 3.

That is: 3x/3 = 0.87/3

this gives us: x = 0.29cents

Next we need to find out how much 10 pakcs of toothpicks costs.

This is the same as: 10x.

We simply substitute 29cents for x and so we end up with: 10* 0.29 = $2.90

 

Answer = $2.90