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Igoryamba
3 years ago
11

Which function below is the inverse of f(x) = x2 − 9?

Mathematics
2 answers:
Scorpion4ik [409]3 years ago
6 0
F (x)=y
y=2x-9


X Y
-2 -15 y=2 (-2)-9
y=-4+-9
y=-15

-1 -11 y=2 (-1)-9
y=-2+-9
y=-11

0 -9 y=2 (0)-9
y=0+-9
y=-9

1 -7 y=2 (1)-9
y=2+-9
y=-1

2 -5 y=2 (2)-9
y=4+-9
y=-5

Here is all the work
AysviL [449]3 years ago
5 0
Let f(x)=y
y=x^{2} -9
Make x the subject of the formula;
y+9=x^{2}
x=\sqrt{y+9}
So, the inverse of the function is thus;
f^{'} = \sqrt{x+9}
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The inverse of this equation
In-s [12.5K]

Answer:

{f}^{ - 1}(x)  =  \frac{x + 11}{ - 5}

Step-by-step explanation:

f(x) =  - 5x - 11 \\  - 5x - 11 =x \\  - 5x = x + 11 \\  {f}^{ - 1}(x)  =  \frac{x + 11}{ - 5}

7 0
3 years ago
Which expression is equivalent to 27 +4 •16
Pavel [41]

Answer:

27+64

Step-by-step explanation:

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6 0
3 years ago
Jasmine has a bag of 48 peanuts. She eats 3/4 of the bag during the baseball game. How many peanuts does she have left? Explain
rosijanka [135]

Answer:

12

Step-by-step explanation:

If she eats 3/4 of the bag, that means she has 1-3/4 = 4/4 -3/4 = 1/4 of the bag left

The bag has 48 nuts. Take the number of nuts times the 1/4 she has left

48 * 1/4 = 12

She has 12 nuts left

7 0
3 years ago
2. The cost of one pizza rose from $8.95
kifflom [539]

Answer:

0.15

Step-by-step explanation:

9.70-8.95= 0.75

0.75÷5= 0.15

4 0
3 years ago
Help!
cricket20 [7]

Answer:

70% = \frac{70}{100} = \frac{7}{10} = 0.7

20% = \frac{20}{100} = \frac{1}{5} = 0.2

Step-by-step explanation:

We know that x% is represented by the fraction \frac{x}{100}.

Now, in the first part, we are given two percentages 75% and 70%.

Now, 75% = \frac{75}{100} = 0.75

and 70% = \frac{70}{100} = \frac{7}{10} = 0.7

Therefore, the second option is correct.

Again, in the second part, we are given two percentages 20% and 25%.

Now, 20% = \frac{20}{100} = \frac{1}{5} = 0.2

and 25% = \frac{25}{100} = \frac{1}{14} = 0.25

Therefore, the third option is correct. (Answer)

4 0
3 years ago
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