I believe the answer is A
Answer:
a) DE ≅ GF
Step-by-step explanation:
In the picture attached, the diagram is shown.
An isosceles trapezoid is a trapezoid in which the base angles are equal and therefore the left and right side lengths are also equal. In this case, the left and right side lengths are DE and GF, respectively; then they are congruent.
Answer:
Domain: All real values (numbers)
Range: all real values that are less than or equal to 4. 
Zeros: x=-2 and x=2 or if you want to write it in an ordered pair, it is (-2,0) and (2,0).
Vertex: (0,4)
Min/Max: 4. or if you want to write in an ordered pair (0,4). In this case, it is a maximum value.
Axis of symmetry: x=0
y-intercept: (0,4)
Step-by-step explanation:
I hope this helps!

which means the sum of the 100 numbers must be