Zinc = 7/18
Divide 4.9 by 7 = 0.7
Multiply by 18 = 12.6
The answer is 12.6 lbs of alloy. Sorry if I'm wrong
13 - 4/7 = <span>12.4285714286 Or when you round it 12.43</span>
Step-by-step explanation:
125 is vertically opposite to the interior angle of triangle
then X+40+X+31+125=180(sum of angle of triangle is 180)
the we get X= -22
1) 39 degree
2) I can't see clearly
3) If it's 1/8 = 45 degree , if it's 1/3 = 120 degree
4) 150 degree