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Here are four straight line equations.

A 3y = 4x + 5
B 4y = 3x - 1
C 4y + 3x = 7
D 4x + 3y = 2
Which of the following statements are true? Choose as many as apply.
Select one or more:
Lines A and B are perpendicular
Lines A and D are parallel
Lines B and D are perpendiculars

Lines B and C are parallel
Lines A and C are perpendicular

User Bgplaya
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1 Answer

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Final answer:

Lines A and D are parallel, lines B and D are perpendicular, and lines A and C are perpendicular. Lines A and B are not perpendicular and lines B and C are not parallel.

Step-by-step explanation:

Determining Relationships Between Lines

To determine the relationships between the lines A, B, C, and D, we need to find their slopes and compare them. In the form y = mx + b, the coefficient of x represents the slope (m). Lines that are perpendicular to each other have slopes that are negative reciprocals, while parallel lines have equal slopes.

  • Equation A in slope-intercept form is y = (4/3)x + (5/3), so its slope is 4/3.
  • Equation B is y = (3/4)x - (1/4), with a slope of 3/4.
  • Equation C can be rewritten as y = (-3/4)x + (7/4), giving it a slope of -3/4.
  • Equation D is y = (-4/3)x + (2/3), so its slope is -4/3.

By examining these slopes:

  • Lines A and B are not perpendicular since the slope of A (4/3) is not the negative reciprocal of B's slope (3/4).
  • Lines A and D are parallel because they have the same absolute slope value (4/3), but opposite signs.
  • Lines B and D are perpendicular because the slope of B (3/4) is the negative reciprocal of D's slope (-4/3).
  • Lines B and C are not parallel or perpendicular; their slopes are not equal nor negative reciprocals of each other.
  • Lines A and C are perpendicular because the slope of A (4/3) is the negative reciprocal of C's slope (-3/4).
User Ololoking
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