Mary says the two expressions 4(5a-8)+2a and 12a-6 are equivalent is she correct

We have 4( 5a - 8 ) + 2a = 20a - 32 + 2a = 20a + 2a - 32 = 22a - 32 =

2( 11a - 16);

The two expressions 2( 11a - 16) and 12a - 16 aren't equivalent.

Step-by-step explanation:

7

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: