Question

One pizza is $12 and a cake is $18. If Matt has $84, how many pizzas can he buy at most and still afford to buy a cake

Answer 1

5 pizzas

Explanation:

So first you subtract 18 so that you know that there is at least one cake.

84 - 18 = 66

When you get 66 dollars remaining, you divide it by 12 to see how many you can afford.

66/12 = 5.5

So because you can’t say you have an additonal amount of money, you would actually round down to 5.

So Matt can buy a total of 5 pizzas and 1 cake.

Answer 2

5

Explanation:

To find the number of pizzas Matt can buy while still being able to afford a cake set up an inequality. The inequality should look like
`84\geq 12x+18` where x is the number of pizzas Matt bought. Then, solve the inequality by first subtracting 18 from both sides,
`66\geq 12x`. Next, divide both sides by 12,
`5.5\geq x`. This means that Matt can buy 5 pizzas. At first, it might seem like you should round up; however, if you rounded up at all then Matt could not afford the cake, so you must round down.