Find the distance between of A(_4'_7) from the y axis
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let the point on y-axis be B(0,-7),
by using distance formula:
AB=√(x2-x1)^2-(y2-y1)^2
AB=√ {0-(-4)}^2-{-7-(-7)}
AB=√ (0+4)^2-(-7+7)
AB=√16
AB=4 units
hope it helps......
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