SAT Math Multiple Choice Question 602: Answer and Explanation
x2 + y2 = 9
y = x2 - 4
A system of two equations and their graphs in the xy-plane are shown above. How many solutions does the system have?
- A. One
- B. Two
- C. Three
- D. Four
Correct Answer: D
Advanced Mathematics (nonlinear systems)
The solutions to the system correspond to the points of intersection of the two graphs. The figure shows four such intersection points.