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CaHeK987 [17]
3 years ago
11

If f(x)=3x-15, then f^-1(x) = solve for x please

Mathematics
1 answer:
amid [387]3 years ago
5 0
1.  Replace f(x) with y:  y = 3x - 15
2.  Interchange x and y:  x = 3y - 15
3.  Solve this for y:  3y = x + 15, and y = (x + 15)/3
4.  Replace y with 

   -1                -1
 f   (x):           f   (x) = (x + 15) / 3            (answer)
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I need help..... please answer ASAP if you know how to solve this
kvv77 [185]
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6 0
3 years ago
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8 0
3 years ago
7. algebra sara allen is interested in buying a notebook
seropon [69]

A percentage is a way to describe a part of a whole. The regular selling price of the computer notebook will be $937.5.

<h3>What are Percentages?</h3>

A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.

To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.

Let the selling price of the computer notebook be represented by x.

Now, if Sara buys the computer this week, the selling price of the computer will be (100%-16%)x = 0.84x.

Also, the saving she made by buying this week will be $150, therefore, we can write,

x-0.84x = $150

0.16x = $150

x = 937.5

Hence, the regular selling price of the computer notebook will be $937.5.

Learn more about Percentages:

brainly.com/question/6972121

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2 years ago
Are there more or less than five PT in a human adult?
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6 0
3 years ago
Jackie set her watch 19 seconds behind, and it falls behind another 1 second every day.
Lunna [17]

Answer:

27

Step-by-step explanation:

the watch was alredy 19 seconds behind so you take 46 and subtract 19 and you get 27

8 0
3 years ago
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