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BlackZzzverrR [31]
3 years ago
11

If the straight line passing through A(-7, -5) and B(-3, x) is parallel to another straight line of slope 2, find the value of x

.
please help,.,,..​
Mathematics
2 answers:
Ostrovityanka [42]3 years ago
8 0
X=3; you can set up a proportion using the slope equation. So (y[sub2]-y[sub1])/(x[sub2]-x[sub1])=2/1 then plug in the values and simplify. Then cross multiply and solve for x. Rest of work shown in the picture
AnnZ [28]3 years ago
3 0

Answer:

x =  3

Step-by-step explanation:

Parallel lines have equal slopes.

Calculate the slope m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = A(- 7, - 5) and (x₂, y₂ ) = B(- 3, x), then

m = \frac{x+5}{-3+7} ← equate to 2, that is

\frac{x+5}{4} = 2 ( multiply both sides by 4

x + 5 = 8 ( subtract 5 from both sides )

x = 3

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