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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:

x is greater or equal to 7

Step-by-step explanation:

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Write down the decimal equivalent to;
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A) 25% = 25/100 = 0.25

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) An instructor gives his class a set of 18 problems with the information that the next quiz will consist of a random selection
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Answer:

The probability the he or she will answer correctly is 1.5%

Step-by-step explanation:

In all, there are 18 problems. In this question, the order of which the problems are sorted for the quiz makes no difference. For example, if the question A of the quiz is P1 and question B P2, and question A P2 and question B P1, it is the same thing.

There are 18 problems and 9 are going to be selected. So, there is going to be a combination of 9 elements from a set of 18 elements.

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In this question, m = 18, n = 9. So the total number of possibilities is:

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Now we have to calculate the number of desired outcomes. This number is a combination of 9 elements from a set of 13 elements(13 is the number of problems that the student has figured out how to do).

Now, m = 13, n = 9. The number of desired possibilities is:

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3 0
3 years ago
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Step-by-step explanation:

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8 0
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A

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