Angle x is the largest angle in triangle xyz. angle y is the smallest angle. how does the sum of the measures of angles y and z compare to the measure of angle x? explain.

Well we could use the fact that the sum of the angles of any triangle gives 180 degrees, so we have:
x + y + z = 180
y + z = 180 - x
or
x = 180 - y - z
of course we cannot the actual values but this is an approach