After arranging the terms in descending powers of a variable, select the opposite of the polynomial. 9 - 12n2 + 4n3 - 7n

4 n3 + 12 n2 + 7 n + 9
-4 n3 - 12 n2 + 7 n - 9
4 n3 - 12 n2 - 7 n + 9
-4 n3 + 12 n2 + 7 n - 9

-4n3+12n2+7n-9

Step-by-step explanation: it basically the opposite sign (positive or negative) switched, and the order backwards. hope that helped

i would say the third one.

step-by-step explanation: liner would mean in a line and the only one that doesn't look like it's even thinking about forming a line would be the third one

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.