6x^2 - x - 40 =(<span>3x - 8)(2x + 5)
and
</span><span>5 + 2x = 2x + 5
</span><span>
so
</span>(6x^2 - x - 40)<span>÷ (5 + 2x)
= [</span>(3x - 8)(2x + 5)] ÷ (5 + 2x)
= 3x -8
answer
3x - 8
Answer:

Step-by-step explanation:
Given

See attachment
Required
Find AB
We have:

Make c the subject


From the attached triangle;

Hence:

Answer:
5
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Step-by-step explanation: