Somebody help please

Mathematics

1 answer:

Troyanec [42]3 years ago

5 0

3.) Are bike helmets always necessary <span>for people to wear?
All you have to do is try to take off the you, so that when people answer the questions, they do not opinions in them.</span>

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Which expression is equivalent to (2x + 7x*) - (5x² - 4x)?

Westkost [7]

Answer:

5x^2 + 13x

Step-by-step explanation:

3 0

2 years ago

HEEELP

Drupady [299]

Answer: (c)

Step-by-step explanation:

Given

$f(x)=\dfrac{1}{x-3}\\\\g(x)=\sqrt{x+5}$

Here, $\sqrt{x+5}\ \text{is always greater than equal to 0}\\\Rightarrow x+5\geq 0\\\Rightarrow x\geq -5\quad \ldots(i)$

To get $f\left(g(x)\right)$ , replace $x$ in $f(x)$ by $g(x)\ \text{i.e. by}\ \sqrt{x+5}$

$\Rightarrow f\left(g(x)\right)=\dfrac{1}{\sqrt{x+5}-3}\\\\\text{Denominator must not be equal to 0}\\\\\therefore \sqrt{x+5}-3\neq0\\\Rightarrow \sqrt{x+5}\neq 3\\\Rightarrow x+5\neq 9\\\Rightarrow x\neq 4\quad \ldots(ii)$