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ollegr [7]
3 years ago
7

Can someone help me please?

Mathematics
1 answer:
Likurg_2 [28]3 years ago
8 0
Dudhdhhxgxgxhxdjxhhxxjdh
the answer is 8
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A car wash cost $7. How many car washes would you be able to purchase for $49. using table
Over [174]
7, 14, 21, 28, 35, 42, 49... 7 cars will need. to be washed to reach $49
4 0
3 years ago
Read 2 more answers
) An instructor gives his class a set of 18 problems with the information that the next quiz will consist of a random selection
RSB [31]

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.

A combination of n elements from a set of m objects has the following formula:

C_{(m,n)} = \frac{m!}{n!(m-n)!}

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

T_{p} = C_{(18,9)} = \frac{18!}{9!(18-9)!} = 48620

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:

D_{p} = C_{(13,9)} = \frac{13!}{9!(13-9)!} = 715

The probability is the number of desired possibilities divided by the number of total possibilities. So

P = \frac{715}{48620} = 0.015 = 1.5%

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

3 0
3 years ago
What is 1755 divide by 27
Zielflug [23.3K]
Your answer is 65. :)
7 0
3 years ago
how many square feet will cover a rectangle 60 feet by 20 feet? Explain how you determined your answer
nika2105 [10]

Answer:

1200

Step-by-step explanation:

2 times 6 = 12

12 times 100 = 1200

Hope this helps if does not please let me know thanks!

7 0
2 years ago
If a line has a slope of 3, what is the slope of a perpendicular line?
pashok25 [27]

Answer:

Slope of perpendicular line is -1/3

Step-by-step explanation:

The slope of the given line is 3 and we have to find the slope of the perpendicular line.

We know that the slope of two perpendicular lines are negative reciprocal of each other.

In other words if the slope of the line is m then then slope of the perpendicular line is -\frac{1}{m}

The reciprocal of 3 is \frac{1}{3}

Hence, negative reciprocal of 3 is -\frac{1}{3}

Therefore, the slope of perpendicular line is -1/3

C is the correct option.

6 0
3 years ago
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