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

Question

Mathematics

Big Mac

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

+1

Answers (2)

Know the Answer?

Catherine · Answer 1

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

Brielle Boyd · Answer 2

B. Because it explains their was 25 girls and some boys so you add x to the 25

(X+25) 0.2 = 9