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3 years ago

12

Domain and range, please help and explain this to me Jim, thanks!!!

1 answer:

SpyIntel [72]3 years ago

7 0

Answers:

Domain = {-24, -6, -4, 4, 21, 47}

Range = {24, 55, 45, 77, 3, 93}

Don't forget about the curly braces.

The domain is the set of all allowed x inputs. So we simply list all the x coordinates of the points given. That's all there is to it. The range is the list of all possible y output values, so we just list the y coordinates. Toss out any duplicate y values. Sorting each set is optional because order doesn't matter in a set.

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Solve the equation for a? z=mab. a)a=z+mb b)a=z-mb c)a= mb/z d)a=z/mb

Bingel [31]

Answer:

a = z/mb

Step-by-step explanation:

Given:

$\displaystyle \large{z=mab}$

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$\displaystyle \large{\dfrac{z}{mb}=\dfrac{mab}{mb}}$

Simplify the expression and we finally have solved for a-term.

$\displaystyle \large{\dfrac{z}{mb}=a}\\\\\displaystyle \large{a=\dfrac{z}{mb}}$

Therefore, the answer to this question is a = z/mb.

Please let me know if you have any questions regarding my answer or explanation!

4 0

2 years ago

In January of 2011, the U.S. saw an increase in gas prices. Imagine the average price per gallon was $3.12 with a standard devia

Arada [10]

Answer:

31.92%

Step-by-step explanation:

We are given;

Population mean; μ = $3.12

Sample mean; x¯ = $3.16

Sample size; n = 10

Standard deviation; σ = $0.27

Z-score formula is; z = (x¯ - μ)/(σ/√n)

z = (3.16 - 3.12)/(0.27/√10)

z = 0.04/(0.08538)

z ≈ 0.47

Now, the percent of other sample means, based on 10 gas stations, that would be greater than the one observed is;

P(x¯ > 3.12) = 1 - P(z < 0.47)

From z-table attached P(z < 0.47) = 0.68082

Thus;

P(z > 0.47) = 1 - 0.68082

P(z > 0.47) ≈ 0.3192

This expressed in percentage is 31.92%

4 0

2 years ago