Answer:
C) x²-2x-15=0
Step-by-step explanation:
You could put both -3 and 5 in the equations to guess and check, but the better way is to use them to create the factors. If -3 is a root, one of the factors must be (x+3). If 5 is a root, the other factor must be (x-5).
(x+3)(x-5)
x²-5x+3x-15=0
x²-2x-15=0
Answer:
x>10
Step-by-step explanation:
-2x<24-4
-2x<20
x>10
Answer:
(n-1)/2n
Step-by-step explanation:
½(1 - 1/n)
(n-1)/2n
Answer:
B.
D.
Step-by-step explanation:
By exterior angle theorem:
Answer:
Its 360 degrees
Step-by-step explanation:
Regardless of the number, the sum of the exterior angles of a polygon, or in this case, a 68-gon, will be 360 degrees.