Marcy and dave are at the jewlery shop. marcy buys a necklace costing $45 and a pair of earings costing $30. an 8% sales tax needs to be added to the price she has to pay

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.