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