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bradenhale2001
23.10.2019 •
Mathematics
Solve by substution
1. y=-4x+2
y=x-3
2. 7x+2y=18
6x6y=0
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Ответ:
The answer to your question is:
Step-by-step explanation:
1.- y = 4x + 2
y = x - 3
x - 3 = 4x + 2
4x - x = -3 - 2
3x = -5
x = -5/3
y = -5/3 - 3
y = (-5 - 9) / 3
y = -14/3
2.- 7x + 2y = 18
6x (+) 6y = 0 There is no sign in the second
equation
Ответ:
(h,k) - the coordinates of the vertex
If a>0, then the parabola opens upwards, so the vertex is the minimum of the function.
If a<0, then the parabola opens downwards, so the vertex is the maximum of the function.
a=-1<0
the vertex is maximum
a=1>0
the vertex is minimum