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A frame of width a surrounds a 5 by 7 inch photograph. Find the expression that represents the area of the frame in terms of a.
a 2 − 35a 2 + 12a4a 2 + 24aNone of these

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apologiabiology
see diagram
totalarea=totallengtht times totalwidth=(2a+5) times (2a+7)=4a²+24a+35

minus original aera
which is 5 by 7 which is 35

4a²+24a+35-35=4a²+24a


3rd option I think, can't tell which is which
Ver imagen apologiabiology

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