The equation consists of two parts. The left side of this equation can be represented by the function and the right side can be represented by the function Graphs of both these functions are shown in the attached diagram.
These graphs have one common point, this means that the equation has one real solution (approximately, x≈-1.839).
Given equation is cubic, then this equation has three roots. Since only one root is real, then two remaining roots are complex.
There are 2 half hours in 1 hour. Since he needs the kayak for 3 half hours, you can multiply the $14.50 by 3. You still need to get the extra 15 minutes. Since a half hour is 30 minutes, and 30 divided by 2 is 15, you can divide 14.5 by 2 to get 7.25. 7.25+ (14.5×3)=15.75.