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Marina CMI [18]
3 years ago
14

Find y when x = -3 for y = 1.5x + 11

Mathematics
2 answers:
jek_recluse [69]3 years ago
8 0
Simply substitute x for -3 in the equation, then carry out forms of multiplication and addition
Hope this helps :)

sineoko [7]3 years ago
3 0

Answer:

y = 6.5

Step-by-step explanation:

y = 1.5x + 11

Let x=-3

y = 1.5(-3) +11

  = -4.5 +11

  6.5

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ANSWER:

\:D.\text{ }f^{-1}\left(x\right)=\left(x+4\right)^2;x\ge-4

STEP-BY-STEP EXPLANATION:

We have the following equation:

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The inverse is the following (we calculate it by replacing f(x) by x and x by f(x)):

\begin{gathered} x=\sqrt{f^{-1}(x)}-4 \\  \\ \sqrt{f^{-1}(x)}=x+4 \\  \\ f^{-1}(x)=(x+4)^2 \end{gathered}

The domain would be the range of the original equation, and it would be the range of values that f(x) could take, which was from -4 to positive infinity, that is, f(x) ≥ -4.

Therefore, the domain is x ≥ -4.

So the correct answer is D.

\:f^{-1}\left(x\right)=\left(x+4\right)^2;x\ge -4

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