The community garden committee uses the expression 5(k − 4) + 2k to estimate the number of plant seedlings needed, where k is the number of garden plots. When k = 8, how many seedlings are needed?
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Worked Solution
Step 1: Substitute k = 8 into 5(k − 4) + 2k.
5(8 − 4) + 2(8)
Step 2: Evaluate inside the bracket.
8 − 4 = 4
Step 3: Multiply by 5.
5 × 4 = 20
Step 4: Evaluate the second term.
2 × 8 = 16
Step 5: Add the two parts.
20 + 16 = 36
36 seedlings are needed.
Correct answer: 36
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