At the post office, Kelly bought postcard stamps for $0.24 and regular letter stamps for $0.39. If her bill totaled $16.80, how many of each stamp did she buy?
+130511 There is no unique solution to this. Let x be the number of 24 cent stamps and y be the number of 39 cent stamps. So we have the following linear equation.
.24x + .39y = 16.80
Several possible solutions are (18, 32), (31, 24), (44,16),(70, 0).......(there may be other integer solutions, as well)......
See the graph of the possible solutions, here......https://www.desmos.com/calculator/2hnmxvuyfl
+130511 There is no unique solution to this. Let x be the number of 24 cent stamps and y be the number of 39 cent stamps. So we have the following linear equation.
.24x + .39y = 16.80
Several possible solutions are (18, 32), (31, 24), (44,16),(70, 0).......(there may be other integer solutions, as well)......
See the graph of the possible solutions, here......https://www.desmos.com/calculator/2hnmxvuyfl
