Answer:
The cost of one large drink is $1.50.
(13.5-10) + 4 = (7.5 ÷ 5) = $1.50
Step-by-step explanation:
The first step is to minus the $10.00 from the $13.50, which gives us $3.50.
<em>13.5 - 10 </em>
We've done this because the pizza is irrelevant to what we're trying to figure out, so we subtract the price of the food, which as we already know is $10, to isolate the price of the 5 drinks to make it easier to find the price of just one.
Once we've done that, we're going to add on the $4.00 they got discounted to the $3.50 in order to find the original price of the drinks without using the gift certificate.
<em>(13.5 - 10) + 4</em>
This gives us $7.50, or the price of 5 large drinks. But we're only looking for the price of one. So we're going to divide the 7.50 by the total number of drinks ordered.
<em>(13.5-10) + 4 = (7.5 ÷ 5)</em>
This gives us 1.5, or $1.50.
<em>(13.5-10) + 4 = (7.5 ÷ 5) = $1.50</em>
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<h2>
Hope this was helpful!</h2>
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and the solutions are decreasing functions.