B. 82 because complementary angles equal 90˚ combined and 90-8=82
The answer is 306.0000 square units.
x-4y-1=0
-x-5y-4=0
----------------
0+y+3=0
y+3-3=0-3
y=-3
Substituting y=-3 in the equation x-4y-1=0
x-4×-3-1=0
x+12-1=0
x+11-11=0-11
x=-11
As you can see, 2.8 - 0.45 is 2.35.
Now, 2.35 squared is 5.225
∛5.832 if you simplify this you get 1.8.
1.8 + 5.225 = 7.3225
Hope this helps :)
Attached is a picture showing the plot in the plane.
Note that for a complex number , x + iy.
The real part of the number is put on the x axis and the imaginary part is put on the y axis.
So plotting:
A = 4 + 1i
B = 9 + 7i
C = 5 + 8i
See picture.