The formula for the axis of symmetry of a quadratic equation in standard form is x
=
−
b
2
a
. Which formula can be used to determine b, given x and a?
A. b=2ax

B. b= x/ax

C.
b=-2ax
D.
b= -2a/x

Awrestling tournament begins with 128 competitors. in the first round, each competitor has 1 match against another wrestler. the winner of each match moves on to the next round until there is a winner. write a sequence in which the terms represent the number of players still in the tournament at the end of each round. describe the sequence? how many rounds are in the tournament?

Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step

Need same math paper but the back now i hope your able to read it cleary i need with hw