Graph: 20x + 3.00y is greater than or equal to 500

1 answer:

5 0

Do you mind if I re-arrange it slightly before we solve it ?

   You said    20x + 3.00y ≥ 500

Subtract 20x
from each side:       3.00 y ≥ -20x + 500

Divide each side by 3 : y ≥ -20/3 x + 500/3

Make it an equation,
and graph this line:    y = -20/3 x + 500/3

The line is made out of all points where 'y' is EQUAL to
1/3 of (-20x + 500).

The inequality wants to see all the points that are equal to it
AND all the points that are greater than that.

So the graph of the inequality is the line AND every point that's
anywhere above the line. It's called the "half-infinite plane"
bounded by the line.

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A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given th

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Answer:

The margin of error for the 95% confidence interval for the mean score of all such subjects is of 8.45.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used 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 = 27 - 1 = 26

95% confidence interval

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