In a live concert, 425 boys and 300 girls participated. find the ratio of boys to girls.

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

Empty box + box + empty box fill in the box is equal to 30 how

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?