The measure of an angle is 7y. Which expression should be used to determine its supplement?(1 point)
Responses
180−7y
180 minus 7 y
180+7y
180 plus 7 y
90−7y
90 minus 7 y
90+7
180-7y
is this correct?why wouldnt it be addition
The supplement of an angle means the angle that when added to the original angle results in a sum of 180 degrees.
So, the expression to determine the supplement of an angle is 180 - 7y, not 180 + 7y. In this case, addition would result in a sum greater than 180, which is not the definition of the supplement of an angle.