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Tanya [424]
3 years ago
6

Does (1, 1) make the inequality 2x + 17y ≥ 19 true?

Mathematics
1 answer:
crimeas [40]3 years ago
7 0

Answer:

The point  (1, 1) makes the inequality 2x+17y\geq 19 true.

Step-by-step explanation:

Given inequality:

2x+17y\geq 19

Point (1,1)

To check if the inequality is true for the given point.

Solution:

For a point (x,y) to make the inequality true it must lie within the inequality range, or in other words it must be a solution of the inequality.

To check if point (1,1) lies within the inequality range, we will plugin the x and y values of the point in the given inequality.

Plugging in x=1 and y=1 in the inequality.

2(1)+17(1)\geq 19

2+17\geq 19

19\geq 19

Thus it satisfies the inequality as 19 is included in the inequality.

Thus, we say point  (1, 1) makes the inequality 2x+17y\geq 19 true.

The graph of the inequality 2x+17y\geq 19 and the location of the point (1,1) is shown below.

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4 years ago
Find the minimum sample size necessary to be 99% confident that the population mean is within 3 units of the sample mean given t
olga55 [171]

Answer:

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From the normal distribution table, The z score of α/2 (0.005) is the critical value and it corresponds to the z score 0.495 (0.5 - 0.005) which is 2.58.

critical\ value = z_{\frac{\alpha}{2} }=z_{0.005}=2.58\\

b) The margin of error (E) is given as:

<h3>E=z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} }\\\\\sqrt{n}= z_{\frac{\alpha}{2} }*\frac{\sigma}{E }\\ \\n=( z_{\frac{\alpha}{2} }*\frac{\sigma}{E })^2\\\\Substituting:\\\\n=(2.58*\frac{29}{3} )^2=622.0036\\\\\\n=623(to\ the \ next\ whole\ number)</h3>

The minimum sample size (n) is 623

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4 years ago
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3 years ago
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