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ryzh [129]
2 years ago
13

Please help me answer keys A. m^10B. 3m^10 C. m^9 D. 3m^9​

Mathematics
1 answer:
Alexeev081 [22]2 years ago
3 0

Answer:

a. m^{10}

Step-by-step explanation:

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7 0
3 years ago
The average marks of the first 10 students are 17 and that of the next 15 students is 18. find the mean of 25 students?
Ray Of Light [21]

Answer:

The mean of 25 students is 17.6

Step-by-step explanation:

The formula of the mean (average) is mean (average) = \frac{S}{N} , where S is the sum of the data, and N is the number of the data

∵ The average marks of the first 10 students are 17

- That means the mean is 17 and the number of students is 10

∴ Average = 17

∴ N = 10

∵ Average = \frac{S}{N}

- Substitute average by 17 and N by 10

∴ 17 = \frac{S}{10}

- Multiply both sides by 10

∴ 170 = S

∴ The sum of the marks of the first 10 students is 170

∵ The average of the next 15 students is 18

∴ Average = 18

∴ N = 15

- Substitute average by 18 and N by 15

∴ 18 = \frac{S}{15}

- Multiply both sides by 15

∴ 270 = S

∴ The sum of the marks of the next 15 students is 270

Now to find the mean of 25 students and the two sums and divide the answer by 25

∵ S = 170 + 270

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The mean of 25 students is 17.6

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3 years ago
Write the phrase as an expression: 5 less than 8
Helga [31]
Ok, listen up
This sign ->  "<" means less than
Therefore, the expression is 5 < 8
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