It could be a building with a triangular top. If the building had a triangular top, then it must have 3 rectangles as its sides. So your answer would be, a building with a triangular top.
Standard form: y = ax² + bx + c
vertex ( -b/2a , y)
this equation;
a = 2
b = 16
c = 31
so the x-coordinate of the vertex is ...
= -16/2(2)
= -16/4
= -4
Use the x-coordiante to find the vertex y-ccordinate
y = 2(-4)² + 16(-4) + 31
y = 32 - 64 + 31
y = -1
Vertex is (-4, -1)
do a rough sketch of the graph using the location of the vertex. "a" is positive so the parabola is right-side up.
Type the equation into https://www.desmos.com/calculator
if you have trouble still
Answer:
360 people out of 1200 are likely to have red hair.
Step-by-step explanation:
So I just saw that 100 x 120 equals 1200. So I just need to multiply 3 x 120 and I got 360. I think this is how to solve?