There are 10 balls numbered 1-10 in a paper bag.  Amanda picks out a ball without looking and puts it back.  If she does this 3 times, what is the probability that she will pick the number 4 each time?

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

only 10/60 isn't equivalent

hope this : )

idc

step-by-step explanation:

idk

the answers are in the images, i received 100% on this assignment. hope this !