Chứng minh rằng tập hợp A = {–1, 1} là một nhóm con của nhóm nhân các số hữu tỉ khác 0, nhưng không là nhóm con của nhóm cộng các số nguyên.

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?