Regression analysis is a statistical procedure for developing a mathematical equation that describes how options one independent and one or more dependent variables are related several independent and several dependent variables are related one dependent and one or more independent variables are related none of these alternatives is correct

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value