a student earned a grade of 80% on a math test that had 20 problems how many problems on this test did the student answer correctly

ANSWER  16 out of 20 correct

Step-by-step explanation:80% of 20=0.8*20=16

or,...

80%=80/100=(80/5)/(100/5)=16/20; 16 out of 20 correct

idk do it yourself or ask somebody idk stop going online asking for

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: