1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
UkoKoshka [18]
3 years ago
14

Bare with me, fractions.

Mathematics
2 answers:
Anettt [7]3 years ago
6 0

\fbox{Option C} is correct as \dfrac{1}{3}\left( {3x} \right) is equal to x an it is equal to inverse x.

Further explanation:

A function that is a reverse of another function is known as an inverse function. If we substitute x in a function f and it gives a result of y then its inverse z to y gives the result x.

Given:

The function f\left( x \right) = 3x and g\left( x \right) = \dfrac{1}{3}x

We have to verify that g\left( x \right) is the inverse of f\left( x \right).

To verify that g\left( x \right) is the inverse of f\left( x \right) we have to show that \left( {f \circ g} \right)\left( x \right) = \left( {g \circ f} \right)\left( x \right).

First we have to find \left( {f \circ g} \right)\left( x \right).

\left( {f \circ g}\right)\left( x \right) can be obtained as,  

\left( {f\circ g} \right)\left( x \right) = f\left( {g\left( x \right)} \right).

Substitute \dfrac{1}{3}x for g\left( x \right) in above equation to obtain \left( {f \circ g} \right)\left( x \right).

\begin{gathered}\left( {f \circ g}\right)\left( x \right) = f\left( {\frac{1}{3}x} \right) \\= 3\left( {\frac{1}{3}x}\right)\\=x\end{gathered}

Now, we have to find \left( {g \circ f} \right)\left( x \right).

\left( {g \circ f} \right)\left( x \right) can be obtained as,  

\left( {g \circ f} \right)\left( x \right) = g\left( {f\left( x \right)} \right).

Substitute 3x for f\left(x\right) in above equation to obtain \left( {g \circ f} \right)\left( x \right).

\begin{gathered}\left( {g \circ f}\right)\left( x \right)= g\left( {3x} \right) \\=\frac{1}{3}\left( {3x}\right)\\=x \\ \end{gathered}

Here, \left( {g \circ f} \right)\left( x \right) is equal to x and \left( {f \circ g} \right)\left( x \right) is equal to x.

Option A is not correct as 3x\left( {\dfrac{x}{3}} \right) is equal to {x^2} which is not equal to inverse x.

Option B is not correct as \left( {\dfrac{1}{3}x} \right)\left( {3x} \right) is equal to {x^2} which is not equal to inverse x.

\fbox{Option C} is correct as \dfrac{1}{3}\left( {3x} \right) is equal to x an it is equal to inverse x.

Option D is not correct as \frac{1}{3}\left( {\frac{1}{3}x} \right) is equal to \frac{1}{9}x which is not equal to inverse x.

Learn more:

1. Learn more about functions brainly.com/question/2142762

2. Learn more about range of the functions brainly.com/question/3412497

3. Learn more about relation and function brainly.com/question/1691598

Answer details:

Grade: High school

Subject: Mathematics

Chapter: Functions

Keywords: functions, range, domain, inverse, reverse, fraction, relation, expression, \left( {g \circ f} \right)\left( x \right), \left( {f \circ g} \right)\left( x \right).

Andrew [12]3 years ago
4 0
If we want to verify that g ( x ) is the inverse of f ( x ) we have to show that:
( f ° g ) = ( g ° f )
f ( g ( x ) )=  3 · ( 1/3 x ) = x
g ( f ( x ) ) = 1/3 · ( 3 x ) = x
Answer:
C ) 1/3 ( 3 x )
You might be interested in
Suppose a die is tossed 5 times. what is the probability of getting exactly 2 fours?
Tasya [4]

Answer:

the probability of getting exactly 2 fours is 0.16

Step-by-step explanation:

The probability of obtaining a number that is four = ¹/₆

The probability of obtaining a non 4 number = 1 - ¹/₆ = ⁵/₆

The number of ways 2 fours can be arrange in five numbers = ⁵C₂ = 10 ways

If the die is tossed five times, the probability of the events is calculated as;

P = 10 x (¹/₆)² x (⁵/₆)³

P = 10 x (¹/₃₆) x  (¹²⁵/₂₁₆)

P = 10 x 0.02778 x 0.5787

P = 0.16

Therefore, the probability of getting exactly 2 fours is 0.16

7 0
2 years ago
Please help, I will give brainliest to best answer
tester [92]

Answer:

060.28

Step-by-step explanation:

3 can't go into 1, but it goes into 18 six times with 0 left over. 3 goes into 0 zero times. 3 goes into 5 one time with 2 left over. 3 goes into 26 (because you pull the 6 down) 8 times with 2 left over.

5 0
3 years ago
I need the answers plz
garik1379 [7]

Answer:

These problems are an example of equations with two unknowns. The way these equations are solved is that we write these equations one under the another.

If both equations have, such is the case here, same parts, we can simply cancel the same parts out and subtract the rest of equatuons. That way, we are left with only one unknown (the other one was eliminated), which makes it easy to solve.

After we have found the value of an unknown, we just plug it back into any of the starting equations and solve for the second unknown.

2. Adult ticket costs $12 and child ticket costs $14.

3. Adult ticket costs $10 and child ticket costs $5.

4. One daylily costs $9 and one bush of ornamental grass costs $2.

5. A van can carry 15 and a bus can carry 56 students.

Step-by-step explanation:

2. If we mark the price of one adult ticket with x and the price of one child ticket with y, we get that:

- first day: 7x + 12y = $252

- second day: 7x + 10y = $224

Now, we can make a system:

7x + 12y = 252

7x + 10y = 224

We can now subtract these two equations and 7x will cancel out, so we get:

12y - 10y = 252 - 224

2y = 28

y = 14

Now, we can plug the value of y into any of the two equations:

7x + 10y = 224

7x + 140 = 224

7x = 84

x = 12

3. Similarly, if we mark the price of one adult ticket with x and the price of one child tickey with y, we'll get a system:

x + 12y = 70

x + 9y = 55

Again, if we subtract these two, x will cancel out, so we have:

12y - 9y = 70 - 55

3y = 15

y = 5

Now, we plug the value of y into any of the two equations, and we get:

x + 9y = 55

x + 45 = 55

x = 10

4. Using the same principle, we can mark the price of one daylily with x and the price of one bunch of ornamental grass with y, we'll get a system:

12x + 11y = 130

12x + 12y = 132

Again, we subtract so that 12x cancel out and we get:

11y - 12y = 130 - 132

-y = -2

If we get minuses on both sides, we can simply multiply both sides with -1 and we get:

y = 2

Again, we plug y:

12x + 12y = 132

12x + 24 = 132

12x = 108

x = 9

5. If we mark number of students in a van with x and the number of students in a bus with y, we get a system:

2x + 12y = 702

2x + y = 86

As you've probably already noticed the pattern, we subtract equations and cancel 2x out to get:

12y - y = 702 - 86

11y = 616

y = 56

Once again, we plug the value of y into any equation:

2x + y = 86

2x + 56 = 86

2x = 30

x = 15

4 0
3 years ago
I have no clue on how to do this​
iren [92.7K]

Answer: neather do i add picture

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
WikiTongues has
konstantin123 [22]

Hey there! I'm happy to help!

We see that 500 languages is a certain percent of the 7,111 total languages. When working with percent equations, the word "is" means "equals", and "of" usually means "multiplied by" This means that 500 is equal to a certain percent multiplied by 7,111. We can use p to represent this certain percent and create an equation below.

500=7,111p

Let's flip the equation around so the p is on the left side. Variables are usually supposed to be on the left.

7,111p=500

We divide both sides by 7,111.

p=0.0703

As a percent, this is about 7.03%. Therefore, about 7.03% of the total languages spoken globally are represented on WikiTongues.

I hope that this helps! Have a wonderful day! :D

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is 8lbx$3.50/lb
    15·2 answers
  • Find a counter example. The product of any integer and 2 is greater than 2
    14·1 answer
  • Are the ratios 3:6 and 2:4 equivalent
    7·1 answer
  • 11. Evaluate: f(x) = x^2 - 2x + 1,
    6·1 answer
  • What is the determinant of k=[6 8]
    10·1 answer
  • <img src="https://tex.z-dn.net/?f=sec2x-1%3D0" id="TexFormula1" title="sec2x-1=0" alt="sec2x-1=0" align="absmiddle" class="latex
    7·1 answer
  • Last year, Kim read a total of 30 fiction and non-fiction books. The number of non-fiction books was 5 less than 4 times the num
    8·2 answers
  • PLEASE HELP!!! Shasha and Alan are both running on the track Shasha begins at the starting line and is running 5 feet per second
    15·1 answer
  • Barry buys a package of pasta
    5·1 answer
  • Find the area of the irregular figure. plssss
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!