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bahjaMcclatchey1110
03.11.2019 •
Mathematics
-
5. if a(x, 1), b(-3,7), c(-5,9), and d(5, 4).
find the value of x so that ab || cd.
find the slope of cd
since ab isparalkl to cd,
set that slope = to ab
and solve for x .
7-1
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Ответ:
Step-by-step explanation:
C(-5,9), and D(5, 4)
Slope = y₂ - y₁/ x₂-x₁
m1 = 4 - 9 / 5- [-5]
= -5 / 5+5 = -5/10 = -1/2
m1 = -1/2
A(x, 1), B(-3,7)
Slope of AB m2 = 7- 1 / -3 - x = 6/ -3-x
As AB || CD, m2 = m1
6/-3-x = -1/2
6*2 = -1 * (-3-x) {cross multiplication}
12 = (-1 * -3) - x * -1
3 + x = 12
x = 12 - 3
x = 9
Ответ:
i think the correct answer is f