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3 years ago

Item 3 Find the slope of the line that contains (-2,-2) and (-10,-9

Mathematics

1 answer:

serg [7]3 years ago

8 0

Answer:

$m=\frac{7}{8}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Algebra I

Slope Formula: $m=\frac{y_2-y_1}{x_2-x_1}$

Step-by-step explanation:

Step 1: Define

Point (-2, -2)

Point (-10, -9)

Step 2: Find slope m

Substitute [Slope Formula]: $m=\frac{-9+2}{-10+2}$
Add: $m=\frac{-7}{-8}$
Simplify: $m=\frac{7}{8}$

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The Information Technology Department at a large university wishes to estimate the proportion of students living in the dormitor

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Answer:

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Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by $\alpha=1-0.99=0.01$ and $\alpha/2 =0.005$ . And the critical value would be given by: