In the xy-coordinate system, (√6, k) is one of the points of intersection of the graphs y = x² - 7 and y = -x² + j, where j is a constant. What is the value of j?
A) 5
B) 4
C) 3
D) 2
E) 1
Submission is closed.
Answer:
Jimmie's answer:
(A) is correct.
1. x² - 7 = -x² + j
2. j = 2x² -7
3. Put in x = √6 and you get j = 12-7
4. j = 5
Winner:
Congratulations to Jimmie Le for winning a 25 dollar book voucher!