Cho tam giác ABC vuông tại A có C=30° Đường cao AH lấy D thuộc HC Sao cho HD=HB . Qua C kẻ CE vuông góc với AD. a, Chứng minh rằng: tam giác ABH= tam giác ADH. b, Chứng minh ABC đều. c, Chứng minh: AH= CE .d, Gọi I là giao điểm củ AH và CE. Chứng minh rằng ID⊥AC

step-by-step explan mxfcg'k; uafwgzfgjhklhgation:

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.