Let's break down each question step by step.
1) George bought 3 burgers, 7 burritos, and paid $100. Find his change.
It appears you meant to write "burgers," but there is no price given for burgers. Let's assume we treat them like burritos.
Assuming burgers are similar in price to burritos, let’s use the price of burritos ($25).
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Total cost of 3 burgers: \[ 3 \text{ burgers} \times 25 = 75 \]
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Total cost of 7 burritos: \[ 7 \text{ burritos} \times 25 = 175 \]
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Total spent by George: \[ 75 + 175 = 250 \]
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Since George only paid $100, he does not have enough to buy all those items.
Therefore, George's change cannot be calculated because he couldn't afford them. However, if we only calculate how much less he had than needed:
\[ 100 - 250 = -150 \] So, he is short by $150.
2) Xoxox stole $100, find how many burritos it's worth.
Using the cost of one burrito ($25), we can find how many burritos $100 can buy.
\[ \text{Number of burritos} = \frac{100}{25} = 4 \]
Therefore, $100 is worth 4 burritos.
3) Xia ate 7 burritos, 9 hotdogs, and 3 turkey sandwiches.
Now let's calculate the total cost for Xia's meal.
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Total cost of 7 burritos: \[ 7 \text{ burritos} \times 25 = 175 \]
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Total cost of 9 hotdogs: \[ 9 \text{ hotdogs} \times 40 = 360 \]
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Total cost of 3 turkey sandwiches: \[ 3 \text{ turkey sandwiches} \times 15 = 45 \]
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Total cost of Xia's meal: \[ 175 + 360 + 45 = 580 \]
So, Xia's total cost is $580.