Answer:
4. 7
5. -2x + 6
6. Multiply the number of hours by 2 and subtract that from the original amount 6 cookies.
Explanation:
4. Plug 2 for x and solve. 2 times 2 is 4 plus 3 is 7.
5. y is the total amount after his sister eats the cookies. He has six cookies, and every hour his sister eats 2, So 6 - 2x. X is the amount of hours. This can be rewritten as -2x + 6
6. You multiply the number of hours by 2 because 2 cookies are eaten every hour. You subtract that from the original amount of cookies to get the amount of cookies left over after the hours.