Lets x = missing angle
x = 180 - (60+80)
x = 180 - 140
x = 40
answer
40
Simplifying
6k + -9 = -15
Reorder the terms:
-9 + 6k = -15
Solving
-9 + 6k = -15
Solving for variable 'k'.
Move all terms containing k to the left, all other terms to the right.
Add '9' to each side of the equation.
-9 + 9 + 6k = -15 + 9
Combine like terms: -9 + 9 = 0
0 + 6k = -15 + 9
6k = -15 + 9
Combine like terms: -15 + 9 = -6
6k = -6
Divide each side by '6'.
k = -1
Write the question down I can't see that
1 = 73 - 2*0.5 = 72 cm
w = 60 - 2*0.5 = 59 cm
h = 38 - 1*0.5 = 37.5 cm
V = l × w × h
V = 72*59*37.5
V = 159,300 cm^3
