The answer would be 200 miles. I just took the test and got it right.
Answer:
x + 4
Step-by-step explanation:

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there are 10 tens per hundred
5 x 10 = 50 tens for five hundred add 4 tens
so 54 tens

You are taking two times a number, which is defined as x. That is equivalent to 2x. Then, you are adding three more to that product.