1325.5
im not too sure, but i think that is the answer.
Rectangle=21 times 14=294 cm^2
Triangle=Base Times Height
Height=21-12=9cm
Area of triangle=16 times 9 =144
Area of both=294+144=438cm^2
6x-3y=12
Step 1- move the 6x to the other side using the opposite operation (-6x)
-3y=12-6x
Step 2- divide everything by -3
y=-4+2x
Step 3- rearrange into the correct order (y-mx+b)
y=2x-4
Step A is wrong because the 12 wasn;t changed to the inverse or opposite operation (-12), while the others were changed.
I’ll see what I can do just give me a few minutes
Answer:
to know the summation of angles: (n-2)*180
here (n) represent numbers of sides
12)we have 5 sides (n=5)
(5-2)*180=540
x=540-(105+135+92+87)=121
13)we have 8 sides (n=8)
(8-2)*180=1080
x=1080-(116+158+141+124+136+132+129)=144
I hope it will help