Find the 18th term of the arithmetic sequence whose common difference is d=5 and whose first term is a = 4.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ab=9, and ac=12, find hc.

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

What is the equation of a line passing through (-6,5) and having a slope of 1/3