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Zigmanuir [339]
3 years ago
7

Pls help :( wll mark branliest

Mathematics
1 answer:
BaLLatris [955]3 years ago
6 0

Answer:

proportional

Step-by-step explanation:

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Answer: B

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What is 3 divided by 6 Keep change flip?
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Step-by-step explanation:

Multiply by the reciprocal, also sometimes referred to as "Keep, Change, Flip." Here is how it works. You rewrite the division question as a multiplication question by flipping the second fraction over. Next, keep the first number, change the division to multiplication and then flip the second fraction over.

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3 years ago
A person must score in the upper 7% of the population on an admissions test to qualify for membership in society catering to hig
olya-2409 [2.1K]

Answer:

The minimum score a person must have to qualify for the society is 162.05

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

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:

Test scores are normally distributed with a mean of 140 and a standard deviation of 15. This means that \mu = 140, \sigma = 15.

What is the minimum score a person must have to qualify for the society?

Since the person must score in the upper 7% of the population, this is the X when Z has a pvalue of 0.93.

This is Z = 1.47.

So

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

1.47 = \frac{X - 140}{15}

X - 140 = 15*1.47

X = 162.05

The minimum score a person must have to qualify for the society is 162.05

7 0
3 years ago
Z/2 + 3 = -80<br><br> The solution is z=
nirvana33 [79]

Answer:

z = -166

Step-by-step explanation:

1. Subtract 3 from both sides to get z/2 = -83

2. Multiply 2 by both sides to get z = -166

z = -166

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3 years ago
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How to find the angle of a triangle with 3 sides?
Molodets [167]

Explanation:

The Law of Cosines specifies the relationship between the three sides of a triangle and any one of the angles. If the sides are designated a, b, and c, and the angle opposite side c is C, then it tells you ...

  c² = a² + b² -2ab·cos(C)

This relationship can be used to find any and all angles, given the three sides of a triangle. Or, having found one angle using the Law of Cosines, the others can be found using the Law of Sines:

  sin(A)/a = sin(B)/b = sin(C)/c

_____

Typically, inverse functions are required. That is, from the Law of Cosines, ...

  C = arccos((a² +b² -c²)/(2ab))

And from the Law of Sines, ...

  A = arcsin(a/c·sin(C))

  B = arcsin(b/c·sin(C))

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<em>Note on solving triangles</em>

It often works best to make use of exact values where possible. It is also a good idea to start with the longest side/largest angle. Of course, once you have two angles the other can be found as the supplement of their sum.

8 0
3 years ago
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