Question 673616

Jan has 21 coins. All of the coins are either pennies or dimes. The coins total $.84 in all. Let p = the number of pennies and d = the number of dimes. Which of the following pairs of equations should Jan use to determine how many coins there are of each value? 


Where are the choices?


Anyway, they are: {{{highlight_green(system (p + d = 21, .01p + .1d = .84))}}}


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