➡3x - ( 7 over 12)
➡ [12 (3x ) - 7 ] over 12
➡ ( 36x - 7 ) over 12
The answer for this question is 1080
You will need more information on the years.
I think the answer would be 112cm.
To find the area of the triangle you need to do basexheight divided by 2.
8x10 divided by 2 = 40
To find the area of the rectangle
12x6=72
40+72= 112cm
I’m not sure if it’s right but I hope this helps.