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velikii [3]
4 years ago
13

Let m=6x+5m=6x+5m, equals, 6, x, plus, 5.

Mathematics
1 answer:
KATRIN_1 [288]4 years ago
4 0

We have been given that m=6x+5. We are asked to rewrite the equation (6x+5)^2-10=-18x-15 in terms of m.

First of all, we need manipulate right side of our given equation.

We will factor out -3 from right side of equation as:

(6x+5)^2-10=-3(6x+5)

Upon substituting m=6x+5 in our equation, we will get:

(m)^2-10=-3(m)

m^2-10=-3m

Upon writing this equation in general form of equation, we will get:

m^2+3m-10=-3m+3m

m^2+3m-10=0

Therefore, the equation m^2+3m-10=0 is equivalent to our given equation.

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A sample of 10 adult elephants had an average weight of 12,556 pounds. The standard deviation
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The 99% confidence interval of the population mean for the weights of adult elephants is between 12,475 pounds and 12,637 pounds.

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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

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99% 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 - 0.99}{2} = 0.995. So we have T = 3.25

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The 99% confidence interval of the population mean for the weights of adult elephants is between 12,475 pounds and 12,637 pounds.

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