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NARA [144]
3 years ago
12

A company did a survey to compare the popularity of two web browsers. It was found that 75 students used browser A and 40 of tho

se students used browser B also. There were 18 students who did not use browser A but used browser B. There were 7 students who did not use either browser A or browser B.
Using a two-way table, predict the number of students who would use browser B when 300 students participate in the survey.

115
133
162
174

Mathematics
2 answers:
pshichka [43]3 years ago
7 0

Answer:

The correct option is D.

Step-by-step explanation:

It is given that,

The number of students who use browser A = 75.

The number of students who use both browsers A and B = 40.

The number of students who use browsers B but not A = 18.

The number of students  who did not use either browser A or browser B = 7.

From the given information, we can make a two way table as shown below.

Total number of students is 100 and 58 of them use browser B.

If 300 students participate in the survey, then the number of students who use browser B is

58\times 3=174

Therefore the correct option is D.

butalik [34]3 years ago
6 0
Answer is 174.

using the given data, find the total number of students in the survey(100)
If no. of students using browser B is 58 when total is 100, what will be the number when  the total is 300? (58*300/100 = 174)
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Problem 18

Answers:

~P -> Q: "if it is not fall, then the leaves change colors"

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Problem 19

Answer: Choice A) 134

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Explanation:

AB = CD

8x = 4x+24

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BC = 18*6+26

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Problem 20

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==========================================

Problem 21

Answer:  99

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Explanation:

The remote interior angles add to the exterior angle (remote interior angle theorem)

(angle RPQ) + (angle PQR) = angle PRS

(3x-29) + (7x-42) = 6x-3

10x-71 = 6x-3

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==========================================

Problem 22

Answer: 116

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Explanation:

Refer to the diagram below.

Solve 105+x = 180 to get x = 75

Solve 135+y = 180 to get y = 45

Solve x+y+z = 180 to get z = 60

Solve z+82+p = 180 to get p = 38

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Solve q+r = 180 to get r = 116

==========================================

Problem 23

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Explanation:

We use a variation of the triangle inequality theorem here.

If p is the missing side length, then

24-20 < p < 24+20

4 < p < 44

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4 < XY < 44

The side XY cannot be 4 inches and it cannot be 44 inches either.

==========================================

Problem 24

4 Answers: A, B, C, D

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Explanation:

Same idea as problem 23

24-10 < x < 24+10

14 < x < 34

So we'll select values between 14 and 34, excluding each endpoint. Those values are x = 16, 18, 24, 26

In other words, only 12 and 34 are non-answers.

==========================================

Problem 25

Answer: C) 84 degrees

----------

Explanation:

The given exterior angle is 152 degrees

Subtract that from 180 to get the adjacent interior angle 180-152 = 28

Now let's find the missing angle of triangle DEB

D+E+B = 180

28+68+B = 180

96+B = 180

B = 180-96

B = 84

This is the measure of angle DBE

This is also the measure of angle ABC because the two angles are vertical angles.

Vertical angles are always congruent.

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