Answer:
x=1
Step-by-step explanation:
Not completely sure on the symbols, but I think it is 5 x ( 22 - 9 x 2 ) - 2 ( 3 x 2 x 4 ) x 7 = 136. It doesn't really match the answers, so my advice is that you use a calculator for this one, or as the person/teacher who gave you the problem how to solve it.
The answer would be...
R=0.51/°2
To find the area you do base a +base b times height and divide by 2 and you have the area