What is negative 11 plus negatives 15

-11 + (-15) = -26

When adding a negative number with a negative number you will simply just add the  two numbers together and the sign of the answer will be negative as well.

Hope this helped!

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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.