Since you were able to type that negative, I will assume that
f(x)=-x^2+3x+8
the vertex is where the graph changes from increasing to decreasing or vice verca
find theh vertex
-b/2a is x coordinate of vertex where
f(x)=ax^2+bx+c
a=-1
b=3
-3/2(-1)=-3/-2=3/2
we see that the leading coeficient (a) is negative so the graph opens down
it increases then decreases at the vertex
so from negative infinity to 3/2 is interval
in interval nottaion
(⁻∞,3/2]
Answer:
540 degrees
Step-by-step explanation:
Triangles ( 3 sides )
180 degrees
Squares ( 4 sides )
360 degrees
Pentagon ( 5 sides)
540 degrees
Hexagon ( 6 sides )
720 degrees
Any Polygon can be calculated using this formula:
n = number of sides
(n - 2) * 180 degrees
*Note, this is only for the sum of the interior angles. Exterior angles on polygons are ALWAYS equal to 360 degrees.
In order to subtract one fraction from another, we need to make the denominator the same in both fractions. The lowest common denominator is 8, because 4 is a factor of 8.
In order to make the denominators the same, multiply both the numerator and denominator of 13/4 by two. This keeps the value of the fraction the same, but will equate the denominators.

At this point, we can simply subtract 5/8 from 26/8.

21/8 cannot be simplified, so it is the answer.