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3 years ago

Question 3 please help me For final exam

Mathematics

2 answers:

AveGali [126]3 years ago

7 0

-13+7k-4=23+16k-2
-13-4=23+9k-2
15=23+9k
-8=9k
-8/9=k

Anuta_ua [19.1K]3 years ago

3 0

-38/9
Have you switch sides for both numbers in each side then divide the numbers you get.
-38 divided by 9 as a fraction equals -38/

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Recall that by the definition of inverse functions:

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Let k⁻¹(-4) = x, where x is an unknown value. Then by definition, k(x) must equal -4.

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$\displaystyle \begin{aligned} \frac{x+3}{x+9} &= -4 \\ \\ x+3 &= -4(x+9) \\ \\ x+3 &= -4x - 36 \\ \\ x &= -\frac{39}{5} \end{aligned}$

Hence, k(-39/5) = -4. By definition of inverse functions, then, k⁻¹(-4) = -39/5.

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