Question 1086289
This posting does not make sense.
1) No ^ characters are visible.
2) A trapezoid (by the american definition of trapezoid) looks like this:
{{{drawing(300,200,-1.8,1.8,-0.1,2.1,
line(-1.8,0,1.8,0),line(-1,2,1.2,2),
line(-1.8,0,-1,2),line(1.8,0,1.2,2),
locate(-0.1,0.2,B),locate(-0.1,2,b),
locate(0.75,1.2,h),arrow(0.7,1,0.7,2),arrow(0.7,1,0.7,0)
)}}}
has two bases (B and b), a height (h), and an area {{{area=(B+b)*h/2}}} .
So, given one base of a trapezoid and its height, we would still be asking about the other base.
 
A trapezoid by the British definition would make us ask even more questions.
 
If instead of a trapezoid, you had a parallelogram or a rectangle, like these
{{{drawing(300,200,-1.8,1.8,-0.1,2.1,
arrow(-1.8,0,-0.3,0),arrow(-1.2,2,0.3,2),
arrow(-1.8,0,-1.5,1),arrow(1.2,0,1.5,1),
line(-1.8,0,1.2,0),line(-1.2,2,1.8,2),
line(-1.8,0,-1.2,2),line(1.8,2,1.2,0),
locate(-0.1,0.2,B),locate(-0.1,2,B),
locate(0.75,1.2,h),locate(-1.3,1.0,area=B*h),
locate(-1.3,1.2,parallelogram),
arrow(0.7,1,0.7,2),arrow(0.7,1,0.7,0)
)}}} {{{drawing(300,200,-1.8,1.8,-0.1,2.1,
rectangle(1.5,0,1.4,0.1),rectangle(-1.5,0,-1.4,0.1),
rectangle(1.5,2,1.4,1.9),rectangle(-1.5,2,-1.4,1.9),
line(-1.5,0,1.5,0),line(-1.5,2,1.5,2),
line(-1.5,0,-1.5,2),line(1.5,0,1.5,2),
locate(-0.1,0.2,B),locate(-0.1,2,B),
locate(0.75,1.2,h),locate(-1.3,1.0,area=B*h),
locate(-1.3,1.4,parallelogram),locate(-1.3,1.2,and),
locate(-0.9,1.2,rectangle),
arrow(0.7,1,0.7,2),arrow(0.7,1,0.7,0)
)}}} ,
then the total area of
such a parallelogram with a base of x and a height of 3 units,
plus a square with sides measuring x would be
{{{x^2+3x=x(x+3)}}} ,
where {{{x^2}}} would be the area of the square,
and {{{3x}}} would be the area of the parallelogram.
However, that does not look like any of your choices for the answer,
so I do not think that would be what the problem was either.