9, 2, -5... so is going down by 7 each time, meaning the "common difference" is -7.
Given the sequence 5, -10, 20, -40, the next two numbers in the sequence are 80 and -160. true false
1 answer:
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9514 1404 393
Answer:
q = 40
Step-by-step explanation:
When the quadratic has roots p and r, it can be factored as ...
(x -p)(x -r) = x² -(p+r)x +pr
So, the sum of the roots is 14, and their difference is 6. This lets us find the roots from ...
p + r = 14
p - r = 6
2p = 20 . . . add the two equations
p = 10
r = 14 -p = 4
The value of interest is then ...
q = pr = (10)(4)
q = 40
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The graph shows the roots to be 4 and 10, as we found.
The formula of a distance between two points:
We have the points (-1, 8) and (5, -2). Substitute: