SOLUTION: In a class of 30 students the ratio of boys to girls is 3:7. If 8 girls join the class find the ratio of girls to boys in the class
Algebra.Com
Question 934330: In a class of 30 students the ratio of boys to girls is 3:7. If 8 girls join the class find the ratio of girls to boys in the class
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = number of boys
y = number of girls
---
x + y = 30
x/y = 3/7
7x = 3y
---
put the system of linear equations into standard form
---
x + y = 30
7x - 3y = 0
---
copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
solution:
x = number of boys = 9
y = number of girls = 21
---
now, add 8 girls:
---
x = number of boys = 9
y = number of girls = 29
---
answer:
y/x = ratio of girls to boys = 29/9
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations with quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
Send and receive free text messages online:
https://sooeet.com
RELATED QUESTIONS
The ratio of boys to girls in a class is 3:4. If 12 more girls join the class, the ratio... (answered by josgarithmetic,ikleyn,TeachMath)
The ratio of girls to boys in a class is 9 : 7. If there are 10 more girls than boys, how (answered by ewatrrr)
The ratio of boys to girls in a class is 3:5.if there are 8 more girls than boys,how many (answered by 428225,Gogonati)
The ratio of boys to girls in a class is 4 : 5.
There are 3 more girls than boys.... (answered by ewatrrr)
The ratio of boys to girls in a class is 3:5. If the total number of students is 32, how... (answered by nerdybill)
there are 35 students in a class and the ratio of boys to girls is 3:4. How many boys and (answered by checkley77)
The ratio of boys to girls in a class is 3:1. There are 36 students in the class. How... (answered by ikleyn,Boreal)
The ratio of boys to girls in a class is 3:5. There are 40 students in the class. How... (answered by dkppathak)
The ratio of boys to girls in a graduating class is 4 to 5. How many boys and girls are... (answered by Fombitz,lenny460)