by Visitor

(United States)

...Dave has...The above sentence means that the number of dimes are 2 times more than the number of nickels. With this, we can start forming an equation related to the dimes and nickels.twice as manydimes as nickels .....

First, let's number of nickels be

So, the value of all the nickels in dollars:

0.05 × y =0.05y

Since the number of dimes are 2 times more than the number of nickels, the number of dimes will be

So, the value of all the dimes in dollars:

0.10 × 2y =0.20y

Now, by adding the value of nickels and dimes, we can get an equation for the total values ($4.50) of the dimes and nikels:

0.05y + 0.20y = 4.50

With this equation, we can find the value of y:

Hence,we have:

Number of nickels = y =

Number of dimes = 2y = 2(18) =