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Crazy boy [7]
3 years ago
15

Find f-1(x) if f(x) = 4x + 5.​

Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
8 0

Answer:

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

Step-by-step explanation:

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

y = 4x + 5 ( subtract 5 from both sides )

y - 5 = 4x ( divide both sides by 4 )

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

Change y back into terms of x

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

Anton [14]3 years ago
3 0

Answer:

(x - 5)/4

Step-by-step explanation:

y = 4x + 5

Make x the subject

x = (y - 5)/4

Interswitch x and y

(f^-1)(x) = (x - 5)/4

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Rama09 [41]
I think 53.088 is the answer
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3 years ago
Timothy is the manager of a car wash. Last week, there were 40 customers. This week there were 75% more customers than last week
elena-s [515]

Answer:

70

Step-by-step explanation:

"75% more customers than last week" means (100% + 75%) of 40, or

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7 0
3 years ago
if you practice a musical instrument each day for 2/3 of an hour how many hours of practice would you get in each week?
RideAnS [48]
In order to find the answer of the given problem above, we need to make the solution below:
Given: 2/3 of an hour = practice each day
           2/3 of an hour is equivalent to 40 minutes
And per week, there are 7 days. So we will multiply 40 minutes by 7, and the result is 280 minutes. Since there are 60 minutes in an hour, we divide 280 by 60 and we get 4.67 hours. Therefore, each week, you would get 4.67 hours of practice on playing a  musical instrument.
3 0
3 years ago
Find angle A and angle E
riadik2000 [5.3K]

Answer:

m∠A = 50°

m∠E = 50°

Step-by-step explanation:

7x - 17 and 2x + 8 are same side exterior angles. They have a sum of 180°.

7x - 17 + 2x + 8 = 180

9x - 9 = 180

9x = 189

x = 21

∠A and 7x - 17 are supplementary. ∠E and 2x + 8 are vertical angles.

m∠A + 7x - 17 = 180

m∠A + 7(21) - 17 = 180

m∠A + 147 - 17 = 180

m∠A + 130 = 180

m∠A = 50

m∠E = 2x + 8

m∠E = 2(21) + 8

m∠E = 42 + 8

m∠E = 50

8 0
3 years ago
The marks obtained by students are 10, 13, 12, 15, 25, 30, 20, 35, 40, 18. Calculate the median mark. ​
antoniya [11.8K]

Answer:

i think its 30

Step-by-step explanation:

3 0
3 years ago
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