State whether or not the pair of lines is perpendicular 2x + 2y = 4 and 2x + y = 8
the lines are not perpendicular to each other
write in the form y=mx+c
2y= -2x+ 4
divide by two each side
y = -x+ 2
2x+y = 8
y = -2x + 8
since the product of the two gradients is not equal to -1 it means that the two line are not perpendicular to each
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