All this question is asking you to do is multiply 65 and 7. The 7 comes from the amount of days in a week. The product of these numbers is 455.
Maria did 455 sit-ups in a week.
Assignment: 
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Answer: 
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Explanation: 
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[ Step One ] Remove Parenthesis (a) = a

[ Step Two ] Simplify Equations



[ Step Three ] Rewrite Equation

[ Step Four ] Add Similar Elements

[ Step Five ] Rewrite Equation

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Answer:
Step-by-step explanation:
4x^2+4x+1