Question

The equation of an ellipse is shown. (x-43)^2/225 + (y-68)^2/169 =1 What is the length of its major axis?
A. 15

B. 26

C. 30

D. 43

Answer 1

first rewrite it as \[\frac{(x-43)^2}{15^2}+\frac{(y-68)^2}{13^2}=1\]
so the major axis is 2a=2x15=30