10! If you use the trapezoid area formula and plug in the known values, just solve for h(height)
http://www.mathopenref.com/coordintro.html
http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/70464
12 minutes because 80-20 is 60 and 60 divides by 5 is 12
Answer:
its the second one -3(x-y)
