Solve using substitution: a jar contains x nickels and y dimes. there are a total of 300 coins in the jar. the value of the coins is $23.75. how many nickels and how many dimes are in the jar? put answer in coordinate form.

77

Step-by-step explanation:

the mean is the average, so if we add all the numbers, and divide it by the amount of numbers their are, we will get an average. In this case, we will add 76+79+80+82+50+78+83+79+81+82= 770. we have ten separate numbers we are adding together to get 770, so we divide 770 by ten to get our answer, 77.