Sushil was thinking of a number. Sushil doubles it, then adds 20 to get an answer of 25.7. What was the original number?

2.85

Step-by-step explanation:

2x+20=25.7

2x+20-20=25.7-20

2x=5.7

2x/2=5.7/2

x=2.85

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.