In a certain hospital, the data, shown to the right, was recorded. use a venn diagram to answer parts (a) through (h) about the blood samples. for parts (d) through (h), the presence or absence of antigens determines blood type, with blood with the rh antigen considered "positive" and blood without the rh antigen considered "negative." a person without the a or b antigens has type o blood. # of samples antigen in blood 4747 a 5 a and b 18 b 11 b and rh 82 rh 1212 none 31 a and rh 4 a, b, and rh

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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