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Given B(17.5), C(11,-3), D(-1,2), and
E(X, -6), find the value of x so that BC lI DE.

User Mikek
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Final answer:

To find the value of x so that BC || DE, we need to find the equations of BC and DE and then set their slopes equal to each other. The slope of BC can be found using the formula m = (y2 - y1) / (x2 - x1), and the slope of DE can be found using the same formula. Setting the slopes equal to each other, we can solve for X.

Step-by-step explanation:

To find the value of x so that BC || DE, we need to find the equations of BC and DE and then set their slopes equal to each other.

The slope of BC can be found using the formula m = (y2 - y1) / (x2 - x1). Substituting the coordinates of points B and C, we get mBC = (-3 - 17.5) / (11 - 17.5) = -20.5 / -6.5 = 3.15.

The slope of DE can be found using the formula m = (y2 - y1) / (x2 - x1). Substituting the coordinates of points D and E, we get mDE = (-6 - 2) / (X - (-1)) = -8 / (X + 1).

Setting the slopes equal to each other, we have 3.15 = -8 / (X + 1).

Solving this equation for X, we can cross-multiply to get 3.15(X + 1) = -8.

This simplifies to 3.15X + 3.15 = -8.

Subtracting 3.15 from both sides, we have 3.15X = -11.15.

Dividing both sides by 3.15, we find X ≈ -3.54.

User Jigar Tarsariya
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