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16 December, 20:15

Students in a dance class filled out a survey. There were 25 girls and some boys who

participated in the survey. The results showed that 20% of the students prefer tap dance to

ballroom dance. There are 9 students who prefer tap dance. Which equation can be used to

find the number of boys (x) who participated in the survey?

A. 0.2 x + 25 = 9

B. 0.2 (x + 25) = 9

C. 0.2 (25 - 9) = x

D. 25 + x = 0.2 * 9

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Answers (2)
  1. 16 December, 22:23
    0
    Given:

    Girls = 25

    Boys = ?

    Number of students who prefer tap dance = 9

    percentage of students who prefer tap dance = 20%

    We need to divide 9 by 20% to get the total number of students who filled out a survey.

    9 : 20% = 45 total number of students

    Girls + Boys = 45

    25 + Boys = 45

    boys = 45 - 25

    boys = 20

    The correct equation is: B. 0.2 (x + 25) = 9

    0.2x + 5 = 9

    0.2x = 9 - 5

    0.2x = 4

    x = 4 / 0.2

    x = 20
  2. 16 December, 22:31
    0
    B. Because it explains their was 25 girls and some boys so you add x to the 25

    (X+25) 0.2 = 9
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