I don't know how to answer the first part but i'll solve it.
5(3+7)-5
5(10)-5
5x10-5
50-5
45
Put an open circle pointing to the left on -1
Answer:
Option A: (-10,0)
Step-by-step explanation:
The given equation of the parabola is in the form of where the focus is located at . Therefore, the focus of the parabola is .
Twice each side:
4*3*2 + 7*3*2 + 7*4*2 = 122