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
Jlenok [28]
2 years ago
6

Which function is the inverse of Rx) = 8x + 4?

Mathematics
2 answers:
Westkost [7]2 years ago
7 0

Answer:

D

Step-by-step explanation:

let y = f(x) and rearrange making x the subject

y = 8x + 4 ( subtract 4 from both sides )

y - 4 = 8x ( divide both sides by 8 )

\frac{y-4}{8} = x

Change y back into terms of x with x = f^{-1} (x)

f^{-1} (x) = \frac{x-4}{8} → D

babunello [35]2 years ago
5 0

Answer:

B.~f^{-1}(x)=\frac{x-4}{8}

Step-by-step explanation:

To find the inverse of a function, swap the places of the x and y variables and solve for y again.

x=8y+4\\x-4=8y\\\frac{x-4}{8}=y

You might be interested in
Volume of a pyramid: v = 1/3(area of base x (height surface area of a pyramid: a = 1/2(perimeter of base x (slant height + (area
stira [4]
V= 1/3 LWH
1/3(3.5)(3.5)(4.7)
19.19 in ^3

SA= 2(3.5)(5.2)+(3.5)^2
48.65 in^2
5 0
2 years ago
Read 2 more answers
Write a function rule for the area of a rectangle whose length is 5in. more than its width. what is the area of the rectangle wh
stellarik [79]

Answer:

40in^2

Step-by-step explanation:

7 0
3 years ago
Someone help please
Nimfa-mama [501]
The answer is B or C
5 0
3 years ago
Combine the like terms to create an equivalent expression: −7−4p−(−5)
Sloan [31]

Answer:

the answer is -4p-2

8 0
3 years ago
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 77 minutes
Komok [63]

Answer:

a. The probability of completing the exam in one hour or less is 0.0783

b. The probability that student will complete the exam in more than 60 minutes but less than 75 minutes is 0.3555

c. The number of students will be unable to complete the exam in the allotted time is 8

Step-by-step explanation:

a. According to the given we have the following:

The time for completing the final exam in a particular college is distributed normally with mean (μ) is 77 minutes and standard deviation (σ) is 12 minutes

Hence, For X = 60, the Z- scores is obtained as follows:

Z=  X−μ /σ

Z=60−77 /12

Z=−1.4167

Using the standard normal table, the probability P(Z≤−1.4167) is approximately 0.0783.

P(Z≤−1.4167)=0.0783

Therefore, The probability of completing the exam in one hour or less is 0.0783.

b. In this case For X = 75, the Z- scores is obtained as follows:

Z=  X−μ /σ

Z=75−77 /12

Z=−0.1667

Using the standard normal table, the probability P(Z≤−0.1667) is approximately 0.4338.

Therefore, The probability that student will complete the exam in more than 60 minutes but less than 75 minutes is obtained as follows:

P(60<X<75)=P(Z≤−0.1667)−P(Z≤−1.4167)

=0.4338−0.0783

=0.3555

​

Therefore, The probability that student will complete the exam in more than 60 minutes but less than 75 minutes is 0.3555

c. In order to compute  how many students you expect will be unable to complete the exam in the allotted time we have to first compute the Z−score of the critical value (X=90) as follows:

Z=  X−μ /σ

Z=90−77 /12

Z​=1.0833

UsING the standard normal table, the probability P(Z≤1.0833) is approximately 0.8599.

Therefore P(Z>1.0833)=1−P(Z≤1.0833)

=1−0.8599

=0.1401

​

Therefore, The number of students will be unable to complete the exam in the allotted time is= 60×0.1401=8.406

The number of students will be unable to complete the exam in the allotted time is 8

6 0
3 years ago
Other questions:
  • A bag contains many different colored marbles. In fact you know the following ...
    6·1 answer
  • Can someone please help?
    7·2 answers
  • Can someone explain this to me
    12·1 answer
  • Write an equation in standard form for the circle?
    15·1 answer
  • 8<br><br> Base = _______________<br><br> Exponents = ________________
    5·2 answers
  • Round 5.53 to one decimal place
    7·1 answer
  • Need help with this questions
    7·1 answer
  • Find the distance between the parallel lines
    7·1 answer
  • Given h(x) = 3(2 – X),<br> what is the value of<br> h(-4)?<br> 4.-6<br> B. 10<br> C.2<br> D.18
    6·2 answers
  • Calculate the area of triangle OPQ.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!