Ahmad is packing curry puffs for an NS camp. He fills n trays with 4 curry puffs each, and then fills 3 more trays with (n − 2) curry puffs each. The total number of curry puffs he packs is given by the expression 4n + 3(n − 2). If n = 7, how many curry puffs does Ahmad pack in total?
Show Worked Solution
Worked Solution
Step 1: Substitute n = 7 into the expression.
4n + 3(n − 2) = 4(7) + 3(7 − 2)
Step 2: Evaluate the bracket first.
7 − 2 = 5
Step 3: Multiply each term.
4 × 7 = 28
3 × 5 = 15
Step 4: Add the results.
28 + 15 = 43
Ahmad packs 43 curry puffs in total.
Correct answer: 43
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