In right triangle abc, ∠a and ∠b are complementary angles and sin a =8/9 . what is cos b?

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

35 ! insert < , > , or = to make the sentence true. 12 __ 25 > =

Is a triangle with sides of length 6ft, 21 ft, 23 ft. a right triangle?