Answer:
1:
we have a rule that is (n-2)×180
while n = number of sides
2:
exterior angle of a polygon = 360 ÷ number of sides
so 360÷25=14.4
3:
octagon is 8 side, so as we said: (8-2)×180 = 1080
4:
lets make an equation, we know that (n-2)×180 = the sum
so (x-2)×180=720
180x -360 = 720
180x = 1080
x=6
1.) 0
2.) -2
3.) -3
Please comment for concerns please likeb
Answer:
Please look at the image below.
Step-by-step explanation:
If you fix this equation into the y-intercept form(y=mx+c), it will become:
-2y=-x+3
y=x/2-3/2
Looking at this, x/2 is the slope, and -3/2 is the y-intercept.
Hope this helps!!!!
Answer:
The equation of the axis of symmetry is x = 
The coordinates of the vertex are (
,
) ⇒ 2nd answer
Step-by-step explanation:
The quadratic function y = ax² + bx + c is represented graphically by a parabola which has a minimum/maximum vertex (h , k), where
- h =
and k is value y at x = h - The axis of symmetry of the parabola is a vertical line passes through the vertex point and its equation is x = h
- The minimum/maximum value of the function is (h , k)
∵ y = 4x² + 5x - 1
∵ The form of the quadratic function is y = ax² + bx + c
∴ a = 4 , b = 5 , c = -1
∵ The coordinates of the vertex points are (h , k)
∵ h = 
∴ h = 
- To find k substitute x in the function by 
∵ k = 4 (
)² + 5(
) - 1
∴ k = 4 (
) + (
) - 1
∴ k =
-
- 1
∴ k = 
∴ The coordinates of the vertex are (
,
)
∵ The equation of the axis of symmetry is x = h
∵ h = 
∴ The equation of the axis of symmetry is x = 