✒MATHEMATICS
SOLUTION :
Let the number of girls be x, number of boys be y, and numbers of teachers be z.
x varies directly as y and inversely as z, so the equation is:
if x = 42, y = 30, z = 5, Solve for k,
- 42 = k(30)/5
- 42 = 6k
- k = 42/6
- k = 7
So, if k = 7, x = 35, y = 45, Solve for z,
- 35 = 7(45)/z
- z = 7(45)/35
- z = [tex]{\boxed{\green{\sf{9 }}}}[/tex]
ANSWER :
- Therefore, number of teachers are 9 teachers.
NOTE: Hello po! This is Just a reminder that we should put our question in the right subject so that it can be easily seen and answered by other users, and this will also prevent deleting your question.
hope this helps
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