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Sergio039 [100]
2 years ago
9

There’s 25 questions in a test how many question do you have to get right to get 80%

Mathematics
2 answers:
IgorC [24]2 years ago
4 0

Answer:

20

Step-by-step explanation:

25*0.80 is 20

BartSMP [9]2 years ago
3 0

Answer:

20

Step-by-step explanation:

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Can someone check on this problem if I did it right this problem is about law of cosines just look at #1
lora16 [44]

Answer:

x = 5.57

Step-by-step explanation:

c² = a² + b² − 2ab cos C

x² = 10² + 6² − 2(10)(6) cos 29°

x = 5.57

Your answer and steps are correct.

8 0
3 years ago
A normal distribution has a mean of 137 and a standard deviation of 7. Find the z-score for a data value of 121. Incorrect Round
Neko [114]

Answer:

The z-score for a data value of 121 is -2.29.

Step-by-step explanation:

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 137, \sigma = 7

Find the z-score for a data value of 121.

This is Z when X = 121. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{121 - 137}{7}

Z = -2.29

The z-score for a data value of 121 is -2.29.

4 0
3 years ago
Read 2 more answers
Combine like terms 2−4y3+5y3+y3+2+5x3+2
Likurg_2 [28]

Answer: 10y3 + 5x3 + 2

Step-by-step explanation:

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If the shaded sector is 75m what would the area be of the circle? A. 30 B. 36 C.144 D. 108
fredd [130]
The correct answer is letter B
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