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pashok25 [27]
4 years ago
13

Select each graph that shows a function and it’s inverse

Mathematics
2 answers:
Zielflug [23.3K]4 years ago
4 0
I need to see the graphs... can you add them ?
alexira [117]4 years ago
3 0

Answer:

1st and last

Step-by-step explanation:

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Let f(x) = 3x +2 and g(x) = 7x + 6. Find f • g and its domain.
Alekssandra [29.7K]
The value of f·g is the product of f(x) and g(x). This is shown below,
                                 f·g = (3x + 2)(7x +6)
                                 f·g = 21x² + 32x + 12
The domain of the function is the value of x that would make the function reasonable. The domain is all real numbers. 
3 0
3 years ago
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Supervisor a earns a flat rate of $25 per hour, while supervisor b earns $20 per hour for the first 30 hours and then 50% more f
mixas84 [53]
Let same number of hours = x, 
since the salary earned is also the same, then
Salary of supervisor A = $25x
Salary of supervisor B = $20(30)+$30(x-30)
Equating
25x=600+30(x-30)
30x-25x=900-600
5x=300
x=60 hours
Check:
Salary of supervisor A = 25*60=1500
Salary of supervisor B =  20*30+30*(60-30)=600+900=1500, ok.
5 0
4 years ago
I don't know how to do it I'm completely lost I asked my mom and brother and even Googled it NOTHING!!! Can you please help me??
telo118 [61]
31/18 is the answer.
To solve, find the common denominator. In this case, I used 54. You need to multiply each fraction to get 54 on the denominator of both.
4 0
3 years ago
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Suppose that a researcher is planning a new study on hemoglobin levels amongst women under 25 years old. Previous research sugge
Mariulka [41]

Answer:

A sample size of at least 531 is required.

Step-by-step explanation:

We are lacking the confidence level to solve this question, so i am going to use a 90% confidence level.

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Find the required sample size for the new study.

A sample size of at least n is required.

n is found when M = 0.05

We have that \sigma = 0.7

So

M = z*\frac{\sigma}{\sqrt{n}}

0.05 = 1.645*\frac{0.7}{\sqrt{n}}

0.05\sqrt{n} = 1.645*0.7

\sqrt{n} = \frac{1.645*0.7}{0.05}

(\sqrt{n})^{2} = (\frac{1.645*0.7}{0.05})^{2}

n = 530.4

Rounding up

A sample size of at least 531 is required.

5 0
3 years ago
Given the quadratic equation below, determine which situation it could represent.
ArbitrLikvidat [17]
Answer: option <span>C. A garage door is 6 feet wider than it is tall. The area of one side of the garage door is 146 square feet.

Justification:

Call x the height of the garage door.

Then, the width is x + 6

And the area of one side is height * width = x (x + 6) = x^2 + 6x

That is equal to 146 feet^2

=> x^2 + 6x = 146
</span>
3 0
4 years ago
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