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Answer:
22
Step-by-step explanation:
(4 x 4) + (2 x 3) = 16 + 6 = 22
Vocab:
Parallel = same slope
Perpendicular = opposite sign and reciprocal slope
-5/2 opposite and reciprocal = 2/5
Solution: they are perpendicular
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The correct answer is:
[D]: "

" .
__________________________________________________Explanation:__________________________________________________
;
Simplify the "denominator" ; → (b + 2b = 1b + 2b = 3b) ;
and rewrite:

;
Cancel out the "b" in the "numerator" to a "1" ;
and cancel the "3b" in the "denominator to a "3" ;
{since: "b ÷ b = 1 "; and since: "3b ÷ b = 3" } ;
and rewrite as:
____________________________________________________ 
;
____________________________________________________ → which is:
Answer choice: [D]: "
" .
____________________________________________________