A.450.80
Multiply 40x9.80=392
Take 1/2 of 9.80 that equal 4.90
4.90 plus 9.80 $14.70x4=58.80
$58.80 plus 392 equals 450.80
It should be ten feet wide
2(17.5) + 2(10) = 55
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The answer is B. the only like terms are 12x and 45x. everything else stays the same.
