Abag contains tiles with the letters a-r-i-t-h-m-e-t-i-c. amelia chooses a tile without looking and doesn't replace it. she chooses a second tile without looking. what is the probability that she will choose the letter t both times

Cesar bought 7 items at the candy store. he bought candy bars for $0.50 each and packs of gum for $0.95 each. he spent a total of $6.80. what system represents the solution for the number of candy bars (x) and the number of pack gum (y) purchased?