Find the sum of the "n" terms of the series:
sn=1²+3²+5²++(2n-1)²

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

How can you tell when x and y are not directly proportional?

If (17, 4) is an ordered pair of the inverse of f(x), which of the following is an ordered pair of the function f(x)? a. (17,4) b. (4.17) c. (4,0) d. 0,17)