Answer:
$5.30 in change!
Explanation:
Hello! Let's help you with your question here!
As always, you should list out with what you know and then what you're trying to figure out. In this case, Malia has $10 in total to spend at the carnival. We also know that each ice cream cone costs $2.35. Now we're trying to find out how much change Malia should receive back.
To begin, for an equation like this, there is a fixed value and a variable value. Now, what do I mean by that?
A fixed value is a value that is not subject to change no matter what. This is something we know for sure stays consistent in every calculation. For this question, $10 is the fixed value because that is something Malia is stuck with, she can't have more than $10 or less than $10 because it is not stated.
A variable value, however; is a value that is subject to change. It is usually based on quantity but can change because of the quantity. In this question, $2.35 is the variable value because that price can change depending on how many ice cream cones Malia buys.
Now that we've figured that out, we can now put this as an equation! And what is that equation? Well, it's this!
Now, why is it like this? Let's say that y is our change we are expecting to get and x represent how many ice cream cones that Malia buys. In simple terms, this formula asks that to get the amount of change of a purchase, we can subtract the total amount of money we have by the cost of one ice cream cone and multiply it by how many ice cream cones Malia is getting.
Since Malia got a gone for herself and her sister, she is going to buy 2 ice cream cones. So, if we plug it into the equation, we get:
Therefore, Malia should expect $5.30 in change. We can also verify this without using the formula as well! We can just add up the total of cost of the two ice cream cones ($4.70) and subtract it from the $10 to find the amount of change. This formula makes it easier cause if you're dealing with a larger number of ice cream cones, you don't have to add $2.35 over and over again. You can just multiply it to get the total cost and then subtract it by the total amount you have!
Do let me know if there is any issue with the question! I can edit the answer as such or I'll change it in the comments if I cannot.