Pls limited time. precal 1. if c and d are matrices and c is the inverse of d, which of the following is true? a. c-d=d-c=i b. c+d=d+c=i c. c/d = d/c=i d. cd=dc=i 2. if a and b are matrices and ab = i, which of the following represents the value of b? -1 4 a= -3 8 a. 1/4 1 -3/4 -2 b.-1/4 -1 3/4 2 c.-2 1 -3/4 1/4 d.2 -1 3/4 -1/4

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.