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Murljashka [212]
3 years ago
9

2/5-1/4 simplified please help will make brainliest ​

Mathematics
2 answers:
fiasKO [112]3 years ago
5 0

Answer:

0.15

Step-by-step explanation:

0.4-0.25

0.15

Vlad1618 [11]3 years ago
3 0

Answer:

8/20-5/20

Step-by-step explanation:

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Suppose ACT Reading scores are normally distributed with a mean of 21.4 21.4 and a standard deviation of 5.9 5.9 . A university
Nutka1998 [239]

Answer:

29.2

Step-by-step explanation:

Mean = 21.4

Standard deviation = 5.9%

The minimum score required for the scholarship which is the scores of the top 9% is calculated using the Z - Score Formula.

The Z- score formula is given as:

z = x - μ /σ

Z score ( z) is determined by checking the z score percentile of the normal distribution

In the question we are told that it is the students who scores are in the top 9%

The top 9% is determined by finding the z score of the 91st percentile on the normal distribution

z score of the 91st percentile = 1.341

Using the formula

z = x - μ /σ

Where

z = z score of the 91st percentile = 1.341

μ = mean = 21.4

σ = Standard deviation = 5.9

1.341= x - 21.4 / 5.9

Cross multiply

1.341 × 5.9 = x - 21.4

7.7526 = x -21.4

x = 7.7526 + 21.4

x = 29.1526

The 91st percentile is at the score of 29.1526.

We were asked in the question to round up to the nearest tenth.

Approximately, = 29.2

Step-by-step explanation:

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3 years ago
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6 0
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The product of x and y is less than or equal to 4
aleksklad [387]
Xy (less than or equal to sign) 4
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Please help me it's one question but I have no idea how to do it!
harina [27]

Answer:

roast beef=$6 per sandwich

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Step-by-step explanation:

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2 years ago
For f(x) = -4x+2 find f(x) when x = -1 A. -2. B. 6 C. -4 D. 2
djverab [1.8K]

Answer:

The answer is letter B which is 6.

f(x) = -4x+2

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2 years ago
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