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martinezarielys17
22.07.2019 •
Mathematics
Vladimir says that the equation of the line that passes through points (-5,-3) and (10,9) is y=4/5x+1. robyn says that the line passes through the points (-10,-7) and (-15,-11). who is correct? a)only vladimir b)only robyn c)both vladimir and robyn d)neither vladimir nor robyn
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Ответ:
so its equation is
y - y1 = (4/5)(x - x1) where (x1,y1) = (10,9) giving:-
y - 9 = (4/5)(x - 10)
y = 4/5 x =1 which is the required equation
So Vladimir is right.
Testing if Robyn is right:-
Plug in his values:-
-7 = 4/5*-10 + 1
-7 = -7 so that point is on the line
-11 = (4/5) * -15 + 1
-11 = -11 so this point is also on the line
- c) Both are right
Ответ:
300m
Step-by-step explanation:
20 x 15 = 300