Systems of equations 1. paco's tacos sold 280 food items from its mobile unit. only tacos ($2 each) and burritos ($3 each) were available. it took in $660 in sales. how many tacos and how many burritos did it sell? 2. penelope printing press promptly sold 5 cent pencils and 10 cent pens to the public. it sold 1000 writing utensils and took in $74.50 in sales. how many pens and how many pencils did they sell?

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:

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.