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tieragroff
28.01.2020 •
Mathematics
The points (-8, -1) and (2 ,4) are the endpoints of a diameter of a circle. find the length of the radius of the circle.
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Ответ:
x = x2 - x1 = -8 -2 = -10
y = y2 - y1 = -1 -4 = -5
diameter = (x^2 + y^2)^1/2 = (100 + 25)^1/2 = 11.18
radius = 11.18 / 2 = 5.59 or 1/2 the diameter.
Step-by-step explanation:
Ответ:
4 lawns
Step-by-step explanation:
$145=$65+N*$20
where N= no. of lawns he needs to now
$80=$20N
N=4