2009 · Q80
Out of a group of swans 7/2 times the square root of the number are swimming in the pool while the two remaining are playing outside the pool. What is the total number of swans?
Elementary MathematicsAlgebra
- A4
- B8
- C12
- D16
Explanation
t²−3.5t−2=0 gives t=4, n=16.