Giá trị a, b để hệ phương trình ⎧⎩⎨x+2y+az=33x−y−az=22x+y+3z=bcó nghiệm duy nhất là Select one:

a.∀a, b∈R

b. a≠212v a` ∀b∈R

c. Không tồn tại a, b∈R

d. a=212v a` ∀b∈R

Whats the name of the vertical axis

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?