## anonymous one year ago Every evening jenna empties out her pockets and puts her change in a jar. at the end of the week she counts her money. one week she had 40 coins, all of them dimes and quaters. when she added them up she had a total of &7.75. how many dimes did jenna have??

You can use the following system equations where: The number of dimes is $$d$$, and the number of quarters is $$q$$:$\begin{array}{} &d&+&&q &=& 40\\ 0.10&d&+&0.25&q &=&7.75 \end{array}$