Step-by-step explanation:
A. part 1: $1.49 for 6 pencils
1 pencil would cost $1.49 / 6 = $0.24833(5s.f.) = $0.25 (nearest cent)
part 2: $4.60 for 20 pencils
1 pencil would cost $4.60 / 20 = $0.23
best value: part 2 (20pencil pack)
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Try this explanation/solution:
a) the system which describes this situation is:

b) the solution of the system made up:

58.51%
however, it is estimating so depending on the answer choices it would be around 55-60% or so