Determine the solution and indicate the restrictions on the variable.

B

Step-by-step explanation:

Subtract 20 from both sides:

Divide both sides by -1:

Square both sides:

Subtract 9 by both sides:

Divide both sides by -8:

That means that either a or b is correct and since 9/8 is positive that means it needs to bee less than 9/8 so the correct answer is B

b

step-by-step explanation:

ez

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: