Domain and range and function

Mathematics

2 answers:

gizmo_the_mogwai [7]3 years ago

8 0

Answer:

jxnxksksksjdnmdnfnffjjdjd

Andre45 [30]3 years ago

3 0

Answer:

j×n×k×s×k×s×k×s×j×d×n×m×d×n×f×n×j×j×d×j×d

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Why is the sum of a rational number and a irrational number always irrational

zhannawk [14.2K]

Answer:

A rational number is a number able to be put into a fraction, an irrational number is not able to be. Therefore, when adding the two, the rational and the irrational will be irrational. For example, 2 is a rational number, and 1.8903 is irrational. If you add the two, you will get 3.18903, which is unable to be put into a fraction.

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3 years ago

Least to greastest awnser

Morgarella [4.7K]

2) -88, -45, 5, 40

4) -45, -31, 20, 49

6) -74, -63, -45, 38

8) 18, 27, 27, 58

10) -60, -49, -40, 9

12) -45, -18, 80, 82

The bigger negative numbers are the least because negative numbers work the opposite way around of positive numbers. :)

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3 years ago

please help! functions and relations. f(x)= square root of x-4. find the inverse of f(x) and it’s domain.

likoan [24]

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:

$f(x)=\sqrt{x}-4$

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.