Answer:
hope you understand the answers
Answer:
Y = -1
Step-by-step explanation:
y has multiple meaning
In graphs, y is the coordinate point we need to plot after assuming a promising value of other coordiante like x
see image below for example
Similarly, it can be said that y is a function of variable x , that is the value of y varies with variable x
D I believe this is correct
Ignore the -4y term for now. Only focus on x^2+20x+100. This can be factored to (x+10)^2. Notice how expanding it out gives
(x+10)^2 = (x+10)(x+10)
(x+10)^2 = x(x+10) + 10(x+10)
(x+10)^2 = x^2+10x + 10x + 100
(x+10)^2 = x^2 + 20x + 100
So this means
x^2+20x-4y+100 = 0
turns into
(x+10)^2 - 4y = 0
after we factor
The second equation listed above implies that we have a parabola because we can solve for y to get
-4y = -(x+10)^2
y = (1/4)(x+10)^2
Are these angles in a triangle?
If so, then subtract them both from 180
180 - 70 - 30 = 80