Are these lines parallel, perpendicular or neither. (6,0)(6,4) and (0,4)(6,4)

After two years, how much has been paid into interest?

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.