Sally bought 4 shirts and 6 pairs of pants and spent $285. Mary bought 7 shirts and 3 pairs of pants and spent $255. How much were
the shirts and the pants?

Set up:

4s+6p=285

7s+3p=355

Solve:

4s+6p=285

(7s+3p=355)*-2

4s+6p=285

+

-14s-6p=-710

=

-10s+0p=-425

/10

s=42.5

solve:

7(42.5)+3p=355

297.5+3p=355

3p=57.5

p=19.17

Shirts: $42.5

Pants: $19.17

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:

8

step-by-step explanation: