Ron claims that the opposite sides of a quadrilateral are always congruent. Which quadrilateral could be used to show that Ron's claim is false?
A non-square rectangle
parallelogram
rhombus
trapezoid

What are the soultion(s) to the quadratic equation 40- x^2=0

What could explain what happened when the time was equal to 120 minutes

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?