Which equation is a linear function?
y=-5
y= 22 +7
y=22 - 1
y= ? +3

let ? be x

every linear equation is y=mx+c

so the answer would be y=?+3

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  

the answer is 96 degrees

step-by-step explanation:

you have to realize that a line equals 180 degrees