A 7-foot board is cut into two pieces. If one piece is x feet long, express the other length in terms of X

y = 7 - x

Step-by-step explanation:

Let y be the length of the other section

x + y = 7

y = 7 - x

of course, the width of the saw kerf (k) should also be accounted for so a carpenter would figure it as

y = 7 - x - k

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: