Multiple choice

the perimeter of a rectangular pool is 48 feet. its length is 4 feet more than its width

let the width of the pool be represented by x.

let width = x

let length = x + 4

perimeter = 2l + 2w

a 2x+2(x+4)=48

b 2x+2x+4=48

c x(x+4)=48

C

Step-by-step explanation:

because x is the width and the length is 4 times the width which adds up to 48.

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: