Carol H. answered 04/07/18
Tutor
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Masters' Degree in Mathematics with 35 Years of Teaching Experience
2x - 7y = 10
-7y = -2x + 10
y = (2/7)x - 10/7 This line has a slope of 2/7. Perpendicular lines have slopes that are negative reciprocals of each other. So, the slope of the new line will be -7/2.
y - y1 = m(x - x1)
y - 5 = (-7/2)(x + 2)
y - 5 = (-7/2)x - 7
y = (-7/2)x - 2 Multiply both sides by -2.
-2y = 7x + 4
7x + 2y = -4