Lines y=4√7·x−3 and y=3√7·x−1 intersect at what height above the x axis?	Choose one:
A) 7√5	B) 12	C) 5√7	D) 0	E) 5
Solve two equations for y   y=4√7·x−3   y=3√7·x−1   Set the two equations equal to each other and solve for x   4√7·x − 3=3√7·x−1   √7·x = 2   x = 2/√7   Plug x = 2/√7 into any one of the original equations to find the y value (height above x axis) where the two lines intersect   y=4√7·x−3   y=(4√7)·(2/√7)−3   y=4·2 - 3   y = 8 - 3= 
<gadget id="calculator">8 - 3</gadget>
<output>5</output>
5   Final answer:   5) 5
<result>E</result>
Lines y=4√7·x−3 and y=3√7·x−1 intersect at what height above the x axis?