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GarryVolchara [31]
3 years ago
5

Find x in this proportion. = x = A)2/5 B)5/2 C)4/5 D)8/5

Mathematics
2 answers:
Bas_tet [7]3 years ago
7 0
I think it would be D 

Over [174]3 years ago
6 0

Find x in this proportion. = x =

A)2/5

B)5/2

C)4/5

D)8/5

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A survey was taken of 49 people to see if they watch basketball and/or soccer games on television. The results are shown in the
emmasim [6.3K]

Answer:

\begin{array}{cccc}&\text{Watch basketball}&\text{Don't watch basketball}&\text{Total}\\\text{Watch soccer}&7&12&19\\\text{Don't watch soccer}&17&13&30\\\text{Total}&24&25&49\end{array}

Step-by-step explanation:

From the diagram you can see that

  • 17 people watch only basketball;
  • 7 people watch both basketball and soccer;
  • 12 people watch only soccer;
  • in total, 17+7+12=36 people watch some sports;
  • so, 49-36=13 people do not watch sports.

So, you can fill the table in following way

\begin{array}{cccc}&\text{Watch basketball}&\text{Don't watch basketball}&\text{Total}\\\text{Watch soccer}&7&12&19\\\text{Don't watch soccer}&17&13&30\\\text{Total}&24&25&49\end{array}

6 0
3 years ago
If the average of x and y is 11 and the average of x, y and z is 5, what is the value of z? ​
mixer [17]

Answer:

z = -17

Step-by-step explanation:

If the average of x and y is 11, then;

x+y/2 = 11

x+y = 2 + 11

x+y = 22 .... 1

similarly, if average of x, y and z is 5, then;

x+y+z/3 = 5

x+y+z = 3*5

x+y+z = 15

Since x+y = 22

22 + z = 5

z  = 5 - 22

z = -17

Hence the value of z is -17

4 0
3 years ago
The sides of the figure below measure 12, 17, and 20 centimeters. Find the
vlada-n [284]

Answer:

The perimeter should be 49 centimeters

Step-by-step explanation:

You're just adding up the centimeters that are stated in the question and then just putting the number there in the answer

8 0
2 years ago
What is the perimeter of a rectangle with vertices located at (-3,-1). (5.-1). (5,9), and
dezoksy [38]

Answer:

36 units

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Professor Halen teaches a College Mathematics class. The scores on the midterm exam are normally distributed with a mean of 72.3
lbvjy [14]

Answer:

14.63% probability that a student scores between 82 and 90

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 = 72.3, \sigma = 8.9

What is the probability that a student scores between 82 and 90?

This is the pvalue of Z when X = 90 subtracted by the pvalue of Z when X = 82. So

X = 90

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

Z = \frac{90 - 73.9}{8.9}

Z = 1.81

Z = 1.81 has a pvalue of 0.9649

X = 82

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

Z = \frac{82 - 73.9}{8.9}

Z = 0.91

Z = 0.91 has a pvalue of 0.8186

0.9649 - 0.8186 = 0.1463

14.63% probability that a student scores between 82 and 90

3 0
3 years ago
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