Answer: B. An angle that has its vertex at the center of a circle
Step-by-step explanation:
Answer:
F(1,5)
Step-by-step explanation:
This is a vertical parabola.
The vertex is at (1,4).
The directrix is y=3.
The distance from the vertex to the directrix is p=1
The focus is (1,4+p), which is (1,4+1)
Therefore the focus is (1,5)
Answer:
g(4a) = 8a^2 -20a +3.5
Step-by-step explanation:
Put 4a where x is and simplify.
g(x) = 0.5x^2 -5x +3.5
g(4a) = 0.5(4a)^2 -5(4a) +3.5
= 0.5(16a^2) -20a +3.5
g(4a) = 8a^2 -20a +3.5
7x + 4y = -8 (1)
-8x - 5y = 13 (2)
(2) + (1)
(-8x-5y)+(7x+4y) = (13)+(-8)
-8x-5y+7x+4y = 5
-x-y = 5 (3)
(3)x4
-4x-4y = 20 (4)
(4) + (1)
(-4x-4y)+(7x+4y) = (20)+(-8)
-4x-4y+7x+4y = 12
3x = 12
x = 4
Sub x=4 into (4)
-4x-4y = 20
-4(4)-4y = 20
-4y = 36
y = -9
Therefore x=4, y=-9.
X= 100 vertical angles- they are congruent
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