In trapezoid $ABCD,$ $\overline{AB} \parallel \overline{CD}$, and $AB < CD.$ The base $\overline{CD}$ has a length of $8.$ The legs $\overline{AD}$ and $\overline{BC}$ have lengths of $7,$ and the diagonal $\overline{BD}$ has a length of $9.$ Find the area of the trapezoid.

overpriced

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

look in attachments

step-by-step explanation:

a = (-2, 0)

b= (-4, 0)

c = (-5,2)

d = (-1,2)