Question

If each notebook cost is $\$2$ and each backpack cost is $\$32$, which of the following represents the cost, in dollars, of $n$ notebooks and $b$ backpacks?

• A. $16nb$
• B. $34nb$
• C. $34(n+b)$
• D. $2n+32b$
• E. $2(n+32b)$

Answer 1

Answer: (D)

$2n+32b$

Cost of one note book $=$2$

$\therefore$ Cost of $n$ note books $=$2n$

Cost of one backpacks $=$32$

$\therefore$Cost of $b$ backpacks $=$32b$

Cost of $n$ note books and $b$ backpacks $=$(2n+32b)$