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vodomira [7]
3 years ago
12

Please help me with this​

Mathematics
1 answer:
Lelu [443]3 years ago
3 0

Answer:

D

Step-by-step explanation:

DDDDdDDDD

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The two-way frequency table below shows data from a random sample of 93 students on their favourite season and whether or not th
daser333 [38]

Answer:

Choice D

Step-by-step explanation:

8 0
3 years ago
What is the area of the circle?
hodyreva [135]

Diameter = radius x 2

So, the radius is half of the denominator.

10 / 2 = 5

A = pi x r^2

A = pi x 5^2

A =  3 x 25

A = 75 ft^2

Hope this helps!

4 0
3 years ago
For the pair of similar triangles, find the value of x.
Murljashka [212]

Find the scale between sides xz and gh

18/4 = 4.5

Multiply the length of fh by the scale to find x


6 x 4.5 = 27


x = 27

7 0
2 years ago
Scores on an exam follow an approximately Normal distribution with a mean of 76.4 and a standard deviation of 6.1 points. What p
klasskru [66]

Answer:

99.89% of students scored below 95 points.

Step-by-step explanation:

Problems of normally distributed samples are 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:

\mu = 76.4, \sigma = 6.1

What percent of students scored below 95 points?

This is the pvalue of Z when X = 95. So

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

Z = \frac{95 - 76.4}{6.1}

Z = 3.05

Z = 3.05 has a pvalue of 0.9989.

99.89% of students scored below 95 points.

5 0
3 years ago
Find the value of the unknown
Marat540 [252]

Answer:

a= 35°

b=70

c=70

Step-by-step explanation:

if u need explanation comment and I'll explain

6 0
3 years ago
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