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malfutka [58]
2 years ago
14

the mean of normally distributed test scores is 80 and the standard division is 5. If there are 186 test scores in the data samp

le, how many of them were in the 75 to 80 range?

Mathematics
1 answer:
Marizza181 [45]2 years ago
5 0

Answer:

63

Step-by-step explanation:

score 75 is one standard dev below the mean ====>to the mean  encompasses approx 34% of scores

.34 * 186 = 63

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Crazy boy [7]

Answer:

B

Step-by-step explanation:

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But first, we'll need to solve for the unknown angle.

We add up the two known angles and subtract that by 180.

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Then, we can use the law of sines.

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Vesna [10]
Protons is the answer that makes the most sense
6 0
3 years ago
Read 2 more answers
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fiasKO [112]

Answer:

red = 28 apples

green = 13 apples

equations:

r + g = 41

r = g + 15

Step-by-step explanation:

r = number of red

g = number of green

r = g + 15 (the number of red apples is 15 more than the number of green apples)

r + g = 41

Substitute the firs equation into the second and solve for a numerical value of g

(g + 15) + g = 41

2g + 15 = 41

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Now solve for a numerical value of r

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r = 13 + 15

r = 28

checking the math:

r + g = 41

28 + 13 = 41

Please lmk if you have any questions.

6 0
2 years ago
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vekshin1
X intercept is when y=0
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7 0
3 years ago
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