Answer:
In the picture
Step-by-step explanation:
I hope that it's a clear solution.
Solve the system
<span>y = x + 4
y = 3x + 6
Note that both equations have been solved for y. Thus, you can set y = y, or
x+4=3x+6. Simplifying, -2 = 2x, or x = -1.
Another way to look at this would be x + 4 = 3x + 6.</span>
Answer:
A) f(x) = 15x + 25; f(0) = 25
Step-by-step explanation:
x represents the amount of extra services, and 15x respresents the amount paid for all of the services. 25 represents the initial fee. f(0)=25 means that it cost $25 for a haircut with no extra services.
Let's say you have a haircut with two extra services. You would replace the x in the equation with the number of extra services, 2 in this case.
f(2)=15(2) + 25
f(2)=30+25
f(2)=55
It would cost $55 for a haircut with 2 extra services.
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Using margin of error, it is found that increasing the sample size results in a smaller sampling error.
The equation for the <em>margin of error</em> is given by:

In which:
- c is the critical value according to the distribution used.
- s is the standard deviation, either of the sample or of the population.
From the equation, it can be noted that the margin of error is inversely proportional to the square root of the sample size, hence, increasing the sample size results in a smaller sampling error.
To learn more about margin of error, you can take a look at brainly.com/question/25821952