Tucker has 5 pennies 6 dimes and 5 quarters what is the ratio of pennies to total coins?

  5 : 16

Step-by-step explanation:

Tucker has a total of 5 + 6 + 5 = 16 coins. The ratio of 5 pennies to that total is ...

  pennies : total coins = 5 : 16

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed