CHECK YOUR UNDERSTANDING Crystal chose the number 104, so she could practice rounding to the nearest
10 and to the nearest 100 before her class quiz. She was confused by her
results.
When she rounded to the nearest 10, she got 100.
When she rounded to the nearest 100, she got 100.
Is Crystal's thinking correct?
Use the number lines below to support your thinking.

clock

step-by-step explanation:

answer: 12

step-by-step explanation:

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:

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