That is dependent because it is changing.independent stays the same
Answer:
9x8=72
Step-by-step explanation:
Your welcome
Answer:
and
.
Step-by-step explanation:
The equation can be simplified with the help of trigonometric identities:

Which means that equation is equal to zero if any component of the product is zero. The solutions of the expression are:
a) 

b) 



Any value different of both subsets do not satisfy the equation described above.
Answer:
2:1
Step-by-step explanation:
for every 2 girls there is 1 boy.