+ is a girl and = is a boy.
So let's say the line starts with a boy and ends with a girl, there's one way.
= + = + = +
Now, let's reverse it, to where it starts with a girl and ends with a boy.
+ = + = + = +
There are two ways to arrange the line if there must be alternating girls and boys
Answer:
well,
Step-by-step explanation:
I guess free points then!
Answer:
Step-by-step explanation:
hello :
f(x) = (x - 5)^2 + 10 ......(vertex form) so the vertex is : (5 , 10 )
