X=-2y+1 and x+2y=9. solve the system of equations, and show work

  there is no solution

Add 2y to the first equation and you get ...

  x + 2y = 1

Compared to the second equation

  x + 2y = 9

you find the equations are "inconsistent." That is, they describe parallel lines, so there are no values of x and y that satisfy both equations.

There is no solution.

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.