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Elina [12.6K]
3 years ago
14

Help pls! Giving brainliest!!!!!

Mathematics
1 answer:
RUDIKE [14]3 years ago
3 0

Answer:

27 = 3 \times 3 \times 3\\\\\frac{1}{27}  = \frac{1}{3 \times 3 \times 3} = \frac{1}{3^{3}}  = 3^{-3}

option 3

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Nikitich [7]

Answer:

option D

Step-by-step explanation:

f(x) = x^2 + 5x + 6

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(fog)(x) = f(g(x))

Plug in g(x) in f(x)

We plug in 1/x+3 in the place of x  in f(x)

f(g(x))= f(\frac{1}{x+3})= (\frac{1}{x+3})^2 + 5(\frac{1}{x+3}) + 6

To simplify it we take LCD

LCD is (x+3)(x+3)

\frac{1}{(x+3)(x+3)}+5\frac{1*(x+3)}{(x+3)(x+3)}+\frac{6(x+3)(x+3)}{(x+3)(x+3)}

\frac{1}{x^2+6x+9}+\frac{(5x+15)}{x^2+6x+9}+\frac{6x^2+36x+54}{x^2+6x+9}

All the denominators are same so we combine the numerators

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\frac{6x^2+41x+70}{x^2+6x+9}

Option D is correct

8 0
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Step-by-step explanation:

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Answer:

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<u>Factoring </u>the left side gives us (x+7)^{2} = 64.

Finally we <u>solve the equations</u>: x+7=\sqrt{64} and x+7=-\sqrt{64}.

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