Justify each step used to simplify the expression.
1. 3x+2y-2x+3=3x-2x+2y+2
2. =(3x-2x)+2y+2
3. =(3-2)x+2y+2
4. =x+2y+2

See below.

Step-by-step explanation:

To simplify the expression use properties of algebra to combine like terms:

1. Expression                          3x-2x+2y+2            

2. Associative Property         (3x-2x)+2y+2

3.  GCF                                    (3-2)x+2y+2

4.  Subtraction                         x+2y+2

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.