Answer:
x = -6/5
y =7/5
Step-by-step explanation:
2x + y = - 1
x - 2y = - 4
Multiply the first equation by 2 so we can eliminate y
2(2x + y = - 1)
4x + 2y = -2
Add this to the second equation
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5x + 0y = -6
Divide by 5
5x/5 = -6/5
Multiply the second equation by -2 so we can eliminate x
-2(x - 2y = - 4)
-2x+4y = 8
Add this to the first equation
0x + 5y = 7
5y/5 = 7/5
A.+4
Graph pass (1 , 0) and (4 , 0)
y = (x - 1) (x - 4) = x² - 5x + 4
c = 4
The answer is the length of time in one time interval
arithmitic
