Question

Which of the following expressions represents the value, in dollars, of a certain number of nickels, n, and dimes, d?

0.15nd

0.15n + d

0.10n + 0.05d

0.05n + 0.10d

Answer 1

0.05n + 0.10d

nickles are 5cent (.o5 of $1) dimes are .1 of a dollar. this shows the addition in dollars of both values.

Answer 2

`0.05n+0.10d`

Explanation:

∵ 1 nickel = $ 0.05 and 1 dime = $ 0.10

Thus, the cost of n nickel in dollars = 0.05n,

While, the cost of d dimes in dollars = 0.10d

Hence, the total value of n nickels and d dimes in dollars

`=0.05n+0.10d`

Which is the required expression.

LAST option is correct.