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forsale [732]
3 years ago
6

Simplify the following expression by combining like terms: 9x2 + 6xy - 3xy + x2

Mathematics
1 answer:
Tamiku [17]3 years ago
3 0

Answer:

10x^2 + 3xy

Step-by-step explanation:

Hope this helps, have a good day

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Answer:

<u><em>26/3  is your answer as a improper fraction </em></u>

<u><em>8.6 is your answer as a decimal </em></u>

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How to add mixed numbers Step-by-step:

1) find the least common denominator

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Answer:

A. 24 ≤ a < 26.

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Step-by-step explanation:

A. Determination of the modal class interval.

Mode is the class with the highest frequency.

From the table given above, the highest frequency is 8, therefore the class will the highest frequency is:

24 ≤ a < 26.

B. To obtain the mean, we must determine the class mark. This is illustrated below:

Class >>>>> class mark >>> frequency

18 – 19 >>>> 18.5 >>>>>>>>> 3

20 – 21 >>> 20.5 >>>>>>>> 2

22 – 23 >>> 22.5 >>>>>>>> 7

24 – 25 >>> 24.5 >>>>>>>> 8

26 >>>>>>>> 26 >>>>>>>>> 0

The mean is given by the summation of the product of the class mark and frequency divided by the total frequency. This is illustrated below:

Mean = [(18.5x3) + (20.5x2) + (22.5x7) + (24.5x8) + (26x0)] / (3+2+7+8+0)

Mean = (55.5 + 41 + 157.5 + 196 + 0)/20

Mean = 450/20

Mean = 22.5

Therefore, the mean age is 22.5

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Step-by-step explanation:

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1.True

false

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