To save for his first house, Patrick established a savings account that is not earning any interest. He planned to invest money according to the formula y=225x+150 , where y represents the total amount of money in his account and x represents the number of months since he started investing.

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.