The correct answer is one main clause.
This means that there is only one verb in the sentence, which in this case is the verb 'was.' Even though drive is also a verb, in this context it is used as an adjective driven (participle form of the verb to drive) and is thus not considered to be a verb. This means that there are no subordinate clauses but rather just one main clause.
The answer is: " 9 mi. "
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<u>Note</u>:
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1 week = 7 days
Total exercise: 30 mi/ wk.
3 mi * 7 = 21 mi. / wk running.
How many miles per week biking?
Assuming that her exercise is strictly: 1) running; and 2) biking:
30 mi - 21 mi. = 9 mi.
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The answer is: " 9 mi. "
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Analyze would be the academic word here
the woman jumped screaming on the chair!