Pens cost pence each and notebooks cost pence each. Which expression is the cost in pence of pens and notebooks?
Answer and explanation
Correct answer: C.
- Step 1: pens cost .
- Step 2: notebooks cost .
- Step 3: Add: .
Answer
.
Why not the others: : This multiplies the unknowns together, but the costs should be added. : The numbers have been swapped between pens and notebooks. : This multiplies , which is not a total cost.
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