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il63 [147K]
3 years ago
7

Factorize 4x2+9y2+16z2+12xy-24yz-16xz

Mathematics
1 answer:
Sever21 [200]3 years ago
5 0

Answer:

(2x+3y-4z)*(2x+3y-4z) or (2x+3y-4z)^2

Step-by-step explanation:

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4 years ago
What is 2/3 cups of 2 cups
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5 0
3 years ago
A physicist examines 10 water samples for iron concentration. The mean iron concentration for the sample data is 0.711 cc/cubic
Ratling [72]

Answer:

Critical value: T = 1.8331

The 90% confidence interval for the population mean iron concentration is between 0.561 cc/m³ and 0.861 cc/m³

Step-by-step explanation:

We have the standard deviation for the sample. So we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 10 - 1 = 9

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 9 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.8331, which is the critical value.

The margin of error is:

M = T*s = 1.8331*0.0816 = 0.15

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 0.711 - 0.15 = 0.561 cc/m³

The upper end of the interval is the sample mean added to M. So it is 0.711 + 0.15 = 0.861 cc/m³

The 90% confidence interval for the population mean iron concentration is between 0.561 cc/m³ and 0.861 cc/m³

8 0
3 years ago
Read 2 more answers
352 divided by 4 please answer I'm literally bad at division
xxMikexx [17]
88............................

3 0
4 years ago
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