Algebra 4
2 marks · EasyCalculate the value of when , and .
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2\times 4 + 3\times 7 = 8 + 21 = 29 (±0)
Common mistakes: Calculate 2 + 4 + 3 + 7 or other order errors
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Marking points
M1 · 1 mark · 1 mark for correct substitution into the formula
A1 · 1 mark · 1 mark for correct final answer
Worked solution
Substitute and :