You can do this by completing the square
x^2 - 14x + y^2 + 8 = 16
(x - 7)^2 - 49 + (y + 4)^2 - 16 = 16
(x - 7)^2 + (y + 4)^2 = 16 + 16 + 49 = 81
so the center is at (7 , -4) and radius = sqrt81 = 9
Part A: Shiloh would collect data on which student spends the most time at the beach
Part B: It is a statistical question
Answer:
x2 + 7x + x2 + 7x + 9 = 3
B. Triangle B and Triangle D
Triangle A has all equal sides and Triangle C is a right triangle.
