Answer:
Step-by-step explanation:
ok so
42≤0.45x+0.60y
x=pounds of finnishing nails
y=pounds common nails
when x+y≥30
now lets solve for y
y=-x+30
lets plug this in to the formula
42≤0.45x+0.6(−x+30)
x≤−160
nowing this lets plug in for x
x+y≥30
-160+y≥30
y≥190
