Answer:
1) 2 1/4 + 5 1/2 + 1/4 = 8
2) 9 1/2 - 3 1/2 = 6
3) 7 x 13 = 91
4) 17 / 2 = 8 1/2
Step-by-step explanation:

has characteristic equation

with roots at
. Then the characteristic solution is

For the particular solution, consider the ansatz
, whose first and second derivatives vanish. Substitute
and its derivatives into the equation:

Then the general solution to the equation is

With
, we have

and with
,

Then the particular solution to the equation is

The Best answer out of the answers above is option 3. A trapezoid has only 1 set of parallel sides.
Hope this Helps! ~Giz