Length would be 243, might want to read the other responses not sure if the answer is right
The area of the trapezoid :

the area of the triangle :
first you should find the height

now :

the area of the whole shape :

the answer is 19ft^2
good luck
Answer:
AB=24.5
Step-by-step explanation:
5x+7=7x
7=2x
x=3.5
7(3.5)=24.5
Answer:
SAS
Step-by-step explanation:
the two triangle have two congruent sides and one congruent angle.
Answer: (-3,-4x)
Solve for the first variable in one of the equations, then substitute the results into the other equation.