I have this weird question that has to do with linear equations (I think), and this is what it says. Let f(x) = 4x - 5 A. Find f

(3) B. Find x when f(x) = -21 Can somebody help me understand this ? ?

Mathematics

1 answer:

hjlf3 years ago

7 0

$f(3)=4\cdot3-5=12-5=7\\\\
4x-5=-21\\
4x=-16\\
x=-4$

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The rule for this sequence is 'multiply by -6'.

Verification ↓

-3*(-6) $\stackrel\checkmark{=}$ 18

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So the rule for the sequence is 'multiply by -6'

And the Common ratio is -6.

Hope that made sense !!

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