5a+5-3a=13 i needed to make it 20 charatcers

a=4

Step-by-step explanation:

5a+5-3a=13

Subtract 5 from both sides

5a-3a=8

2a=8

Divide both sides by 2

4

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.