Rocky is standing on a sidewalk made of cement squares. He will toss a coin 4 times. For each head, he'll move one square forward. For each tail, he'll move one square backward. What is the probability that after 4 tosses he'll be back in the square where he started? Express your answer as a common fraction..

step-by-step explanation:

see if this :

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  

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation:

whose power in the senate is equal to the power of the speaker of the house?

step-by-step explanation: