For the following pair of equations, predict whether they represent parallel lines, perpendicular lines, or lines that intersect but are not perpendicular.8.4x + 8.1y = 8.7 and 8.1x - 8.4y = 2.1
A. parallel lines
B. lines that intersect but are not perpendicular
C. perpendicular lines
Answer: C
Mathematics
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B.
| 81 cm2 |
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÷ 
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