Question

At a sushi restaurant, nigiri cost $4.50 per serve and sashimi costs $9.00 per serve. Hiroko spent a total of $45 buying x serves of nigiri and y serves of sashimi. If Hiroko bought 5 serves of nigiri, how many serves of sashimi did Hiroko buy?

1) 3
2) 4
3) 5
4) 6

Answer 1

Hiroko bought 2 serves of sashimi.

Step-by-step explanation:

To find out how many serves of sashimi Hiroko bought, we need to subtract the cost of the nigiri from the total amount spent and then divide by the cost of the sashimi per serve. We are given that Hiroko bought 5 serves of nigiri and a total of $45 worth of sushi. The cost of the nigiri per serve is $4.50, so the cost of the nigiri Hiroko bought is 5 * $4.50 = $22.50.

Now we subtract the cost of the nigiri from the total amount spent to find out how much Hiroko spent on sashimi: $45 - $22.50 = $22.50.

The cost of the sashimi per serve is $9.00. We can now divide the amount Hiroko spent on sashimi by the cost per serve to determine how many serves of sashimi Hiroko bought: $22.50 ÷ $9.00 = 2.5 serves.

Since Hiroko cannot buy a fractional number of serves, we round down to find that Hiroko bought 2 serves of sashimi.