leslie1811
03.09.2020 •
Mathematics
The point (2,-4) is on the line given by which equation below?
2,-4)
A. y = -x + 3
B. y = x - 4
C. y=-2x
D. y = 2x
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Ответ:
C ) y = -2x
Step-by-step explanation:
(2, -4)
y = -2x
subsitute x for the value of x
y = -2(2)
-2 × 2 = -4
y = -4
so
the equation for the point (2, -4) is
y = -2x
Ответ:
MN=8
Step-by-step explanation:
since AM/AC = AN/AB = 2/5,
then ∆ABC similar to ∆ANM.
since ∆ABC ~ ∆ANM,
then MN || BC.
by similarity
MN = BC•2/5 = 8