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2 years ago

If f(x) = 5x - 1, then f^-1(x)=

Mathematics

2 answers:

lesantik [10]2 years ago

7 0

F(-1)=5(-1)-1
-5-1
-6
Your answer is-6

Airida [17]2 years ago

3 0

Answer:

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

Step-by-step explanation:

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

y = 5x - 1 ( add 1 to both sides )

y + 1 = 5x ( divide both sides by 5 )

$\frac{y+1}{5}$ = x

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

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

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24 less than 4 times a number is 60. what is the number?

kondaur [170]

Hey there! :D

Make an algebraic expression.

Let the 'number' equal x.

4x-24= 60

Add 24 on both sides.

4x= 84

Divide both sides by 4.

x=21

The number is 21.

I hope this helps!
~kaikers

8 0

3 years ago

The ratio between the number of students (s) on a field trip and the number of teachers (t) on the field trip is 21/4. There are

RoseWind [281]

Answer:

Step-by-step explanation:

If there needs to be 4 teachers per 21 students, you would divide the total amount of students by 21 and multiply that answer by 4. SO...:

84 ÷ 21 = 4 groups of 21 students.

4 groups × 4 teachers = 16

*** Answer***

16 TEACHERS

5 0

3 years ago

What is the image of (8, -6) after a reflection over the y=x<br> Submit Answer

scoundrel [369]

$\: ( \: \: \: 8 \: \: \: , \: \: \: - 6 \: \: \: )$

$y = x$

$\: ( \: \: \: - 6 \: \: \: , \: \: \: 8 \: \: \: )$

<h2>Just switch x and y</h2>

4 0

2 years ago

What is 75% of 90? Round the answer to the nearest tenth

Scorpion4ik [409]

Answer: 67.5

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Kofi estimated that he would run a total of 10 km in 1 h. In 1 h, he actually ran 46 times around a track 0.25 km long, going a

strojnjashka [21]

The equation to find percent error is

$\frac{actual-theoretical}{theoretical}*100$

where actual is the value that actually came out (in this case, 11.5 km) and theoretical is the value that was supposed to come out (in this case, 10 km). Just plug in the numbers and simplify.

$\frac{actual-theoretical}{theoretical}*100\\\\\frac{11.5-10}{10}*100=\frac{1.5}{10}*100=15\%\ error$

So, the true answer would be 15%. Apparently, the question you're asking takes 11.5 as the theoretical and the 10 as the actual (which I personally disagree with)

If you plugged in the numbers that way, the answer comes out to 13.04%. So, the correct answer for your answer choices is c. 13%

3 0

2 years ago