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2 years ago

12

Which equation represents a proportional relationship?

1 answer:

forsale [732]2 years ago

7 0

Y=4x+1 is the answer to your question

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Write an equation to represent each graph

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2 years ago

Convert the mixed number to an improper fraction. enter your answer below using the slash mark ( / ) as the fraction bar

eduard

The Answer Fam Is 99/10

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If there are 600 marbles in a jar, and 22% of them are red, how many are red

Blizzard [7]

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2 years ago

The scores on a psychology exam were normally distributed with a mean of 60 and a standard deviation of 10 . A failing grade on

tensa zangetsu [6.8K]

Answer:

The cutoff for a failing score was 40,

Approximately 2.3% of the students failed.

Step-by-step explanation:

Given,

Mean, $\mu=60$

Standard deviation, $\sigma=10$

Let x represents the cutoff for a failing score,

Thus, according to the question,

$\frac{x-\mu}{\sigma}=-2$

$\frac{x-60}{10}=-2$

$x-60=-20$

$x=-20+60$

$x=40$

Thus, the cutoff for a failing score is 40,

∵ P(<-2) = 0.02275 = 2.275 % ≈ 2.3 %

Hence, Approximately 2.3 % of the students failed. 

7 0

2 years ago