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3 years ago

If y=2 2/3 when x=1/4, find y when x=1 1/8

Mathematics

1 answer:

Nata [24]3 years ago

4 0

Answer:

x = 1/4 when y = 8/3

Step-by-step explanation:

Divide both by 1/4

x = 1 when y = 32/3

When x = 1 1/8 = 9/8

y = 32/3 x 9/8

y = 12

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valina [46]

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If $x=-3$ and $y=1$ , the above reduces to

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3 years ago

The completion time for an exam is normally distributed with expected value 75 minutes and variance 12 minutes. What is the prob

Debora [2.8K]

Answer:

14.89% or 0.1489

Step-by-step explanation:

First, find the z-score for both 70 and 80 minutes and their corresponding percentile.

$z= \frac{X - \mu }{SD} \\SD=\sqrt{V} =\sqrt{12}\\\mu =75\\z= \frac{X - 75}{\sqrt{12}}\\\\$

For X = 70 minutes:

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This z-score is equivalent to the 7.445 th percentile, so the probability of a student finishing this exam in less than 70 minutes is 7.445%

or X = 80 minutes:

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This z-score is equivalent to the 92.555 th percentile, so the probability of a student finishing this exam in more than 80 minutes is 100- 92.555 = 7.445%

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3 years ago

all whole numbers are integers. (true or false) all rational numbers are whole numbers. (t or f) there are rational numbers that

8_murik_8 [283]

Answer:

all whole numbers are integers= true

all rational numbers are whole numbers= false

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there are whole numbers that are not integers= true

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