First one the answer is A; Alexander needs 70 ft
With some simple rearrangement, we can rewrite the numerator as

Then factorizing the difference of squares,
, we end up with

You would be able to buy 5 packages 5×8=40 and 40÷8=5
725 inches long.
<span>the height of the parallelogram?
</span>
The first choice is right, area of 1 is 20, area of 2 is 16