Cho đường tròn tâm O đường kính AB. Trên đường tròn lấy D khác A, B sao cho góc DAB lớn hơn 60 độ. Trên đường kính AB lấy C khác A, B và kẻ CH vuông góc với AD tại H. Phân giác trong của góc DAB cắt (O) tại E (E KHÁC A) và cắt CH tại F. Đường thẳng OF cắt (O) tại N. Khi AD=BC, chứng minh rằng DN đi qua trung điểm AC

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

Christine wong has asked dave and mike to her move into a new apartment on sunday morning. she has asked them both, in case one of them does not show up. from past experience, christine knows that there is a 40% chance that dave will not show up and a 30% chance that mik a. what is the probability that both dave and mike will show up? (round your answer to 2 decimal places.) b. what is the probability that at least one of them will show up? c. what is the probability that neither dave nor mike will show up? (round your answer to 2 decimal places.)e will not show up. dave and mike do not know each other and their decisions can be assumed to be independent.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g