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3 years ago

X+15=20? Solve for X. A. x=5 B.x=15 C.x=20 D.x=4

Mathematics

2 answers:

Phoenix [80]3 years ago

5 0

Answer:

x = 5

Step-by-step explanation:

x + 15 = 20

x = 20 - 15

x = 5

Karo-lina-s [1.5K]3 years ago

4 0

Answer:

X = 5

Step-by-step explanation:

If X = 5 then 5+15 = 20

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bogdanovich [222]

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3 years ago

A college statistics class at a nearby university has 1,000 students enrolled in it. On a recent exam, the mean score was 75% wi

IceJOKER [234]

Answer:

38.11%

Step-by-step explanation:

Given that:

Mean (μ) = 75, standard deviation (σ) = 5

Z score is a measure in statistics to determine the variation of a raw score from the mean. It is given by the equation:

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

To calculate the percentage of students scored between a 73 and 78 (C grade), we need to find the z score for 73 and then for 78.

For x = 73, the z score is:

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3 years ago