Answer:
The cost of 7.5 lbs of chopped walnuts is $25.875
Explanation:
we are given
It costs $3.45 to buy lb of chopped walnuts
so,
1 lb of chopped walnuts = $3.45
now, we can multiply both sides by 7.5

so, we get
7.5 lbs of chopped walnuts = $25.875
So, the cost of 7.5 lbs of chopped walnuts is $25.875