For 4 weeks in June, Cameron biked 3 1/4 miles each week and swam 2 1/2 miles each week. For 3 weeks in July, he biked 4 3/4 miles each week and swam 3 1/2 miles each week. How much greater was the total distance Cameron biked and swam in July compared to the total distance he biked and swam in June?

He swam 1/2 mile more and biked 1  1/4 mile more in July

Step-by-step explanation:

June -- Bike    4 * ( 3  1/4)  = 13 miles

            Swim 4 * (2  1/2) = 10 miles

July -- Bike   3 * (4  3/4) = 14 1/4 miles

         Swim   3 * (3  1/2) = 10 1/2 miles

14  1/4 - 13 =   1  1/4

10  1/2 - 10 =  1/2

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: