Answer:
Answer C
Step-by-step explanation:
If the polygon has n sides, then the number of diagonals the polygon has is
(n - 3)*n/2
So for a seven sided figure the number of diagonals would be
(7 - 3)(7)/2 = 4*7/2 = 28/2 = 14
Answer:
x=3
Step-by-step explanation:
-Find the positive & negative intervals-
x<19/2, x ≥ 19/2
-Solve the inequality for each interval-
x=3, so solving for x, it would equal 3.
Question
Why do it say incorrect answer?
But that’s a trinomial equation.
D would equal to either 9 or －9
