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3 years ago

Which expression is equivalent to -1.3 +(-4.9)+(-2.6)?

Mathematics

2 answers:

andrew-mc [135]3 years ago

8 0

This is easy do you want me to explain it or give you a direct answer

alexandr1967 [171]3 years ago

8 0

Aaaay the answer is -8.8

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Write that in place of 'radius' in the formula, and use
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4 years ago

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3 years ago

For the following right triangle, find the side length x. X 9 12

Sati [7]

Answer:

it's the square root of 63 and I'd assume rounding to the tenth but I dont know how ur teacher does it.

Step-by-step explanation:

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3 years ago

The statement "The square of any rational number is rational" can be rewritten formally as "For all rational numbers x, x 2 is r

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For all x,y,z, if x,y and z are the angles of a triangle, x+y+z = 180

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3 years ago

The weights of running shoes are normally distributed with an unknown population mean and standard deviation. If a random sample

VLD [36.1K]

Answer:

The margin of error for a 95% confidence interval estimate for the population mean using the Student's t-distribution is of 6.22 ounces.

Step-by-step explanation:

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 = 23 - 1 = 22

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 22 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 2.0739

The margin of error is:

M = T*s

In which s is the standard deviation of the sample.

In this question:

s = 3.

Then

M = 2.0739*3 = 6.22

The margin of error for a 95% confidence interval estimate for the population mean using the Student's t-distribution is of 6.22 ounces.

8 0

3 years ago