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2 years ago

Which function is the inverse of f(x) = –5x – 4?

Mathematics

2 answers:

UNO [17]2 years ago

6 0

Answer:

$f^{-1}(x)=-\frac{1}{5}x-\frac{4}{5}$

Step-by-step explanation:

we have

$f(x)=-5x-4$

Let

$y=f(x)$

$y=-5x-4$

Step 1

Exchange the variables x for y and y for x

$x=-5y-4$

Step 2

Isolate the variable y

$x=-5y-4$

$5y=-x-4$

$y=-\frac{1}{5}x-\frac{4}{5}$

Step 3

Let

$f^{-1}(x)=y$

$f^{-1}(x)=-\frac{1}{5}x-\frac{4}{5}$

ra1l [238]2 years ago

5 0

Just took the test. A is the right answer.

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Now,

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And many more possibilities.

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9514 1404 393

Explanation:

1. The general form of a quadratic in standard form* is ...

$f(x)=ax^2+bx+c$

An example is ...

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The constant c is the y-intercept, so is the easiest bit of information to obtain in this form.

2. The general form of a quadratic in vertex form can be written as ...

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An example is ...

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* In the UK, "standard form" is vertex form.

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