Answer:
Step-by-step explanation:
first lets find the total # of portions:
3+4+13=16+4=20
To make 4kg of this alloy you have to use:
nickel: (4/20)*3=12/20=6/10=0.6 kg
zinc: (4/20)*4=16/20=8/10=0.8 kg
copper: (4/20)*13=52/20=26/10=2.6 kg
the answer is 10-6x (B)
Slope=10
y intercept=17
