Jack is learning to save, spend, and give money away. He is determined to give
away 10% of his summer job earnings. If he gives away $256, how much did he earn
this summer?

$2,560

Step-by-step explanation:

-Given, that 10% is given away and that the total given away this summer was$256.

#We use the law of proportions to calculate the full value of 100%

let x be the total earnings made:

#Alternatively, we can just multiply 256 by 10.

Hence, the total earnings in the summer was $2,560

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:

50

step-by-step explanation: