{[(30−60)÷(−30)]2−15}÷(−7)

the -30 is squared

Step-by-step explanation:

1 is y = 15x, in 9 years he will have saved $13,500

2 is x2 − 4x − 211 is y = 15x, in 9 years he will have saved $13,500

2 is x2 − 4x − 21

idk bring the function back   im not smart

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: