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initial knowledge check
evaluate the expression when a = 7 and b=4.
b + 8a

60

Step-by-step explanation:

Substitute a = 7 and b = 4 into the expression

b + 8a = 4 + (8 × 7) = 4 + 56 = 60

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.