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Alecsey [184]
3 years ago
5

A bank's monthly charge for maintaining an account is $.45 for each check written plus a service charge of $12.50. If x represen

ts the number of checks written during the month, which function models this situation?
A) f(x) = x + 12.50
B) f(x) = 0.45x -12.50
C) f(x) = 12.50x + 0.45
D) f(x) = 0.45x + 12.50
Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
7 0
The answer is D     this info is 100% correct hopefully you still need it <span />
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Answer:

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Step-by-step explanation:

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Average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.
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The average rate of change is the slope of the secant line connecting the points on f(x) from x=-5 to x=10.

In other words, it is just the slope of the straight line connecting the points
(-5,f(-5)) \: and \: (10,f(10))

So we were given ,

f(x) = {x}^{2} - 3x - 10

At
x = - 5
f( - 5) = {( -5 )}^{2} - 3( - 5) - 10
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Also at
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f( 10) = 100- 30 - 10
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The average rate of change
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3 years ago
In a study, the sample is chosen by pulling 50 names from a hat What is the sampling method? Simple Random Stratified Convenienc
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Answer:  Simple Random

Step-by-step explanation:

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An airline is planning its staffing needs for the next year. If a new route is​ approved, it will hire 858 new employees. If a n
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Answer:

E(X) = \sum_{i=1}^n X_i P(X_i)

And from the problem we know the following:

P(X_1) = 0.34 , X_1 =858 represent the condition if the route is approved

P(X_2) = 1-0.34=0.66 , X_1 =157 represent the condition if the route is NOT approved

Then replacing in the formula for the expected value we got:

E(X) = 858*0.34 + 157*0.66 = 395.34

So then the expected number of new employees to be hired by the​ airline based on the conditions given is between 395 and 396.

Step-by-step explanation:

For this cae we can define the random variable X who represent the number of new employees to be hired by the​ airline and we can find the expected value with the following general formula:

E(X) = \sum_{i=1}^n X_i P(X_i)

And from the problem we know the following:

P(X_1) = 0.34 , X_1 =858 represent the condition if the route is approved

P(X_2) = 1-0.34=0.66 , X_1 =157 represent the condition if the route is NOT approved

Then replacing in the formula for the expected value we got:

E(X) = 858*0.34 + 157*0.66 = 395.34

So then the expected number of new employees to be hired by the​ airline based on the conditions given is between 395 and 396.

6 0
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