I need to know the answer ASAP

In the diagram, gef and hef are congruent. what is the value of x

20 ! jason orders a data set from least to greatest. complete the sentence by selecting the correct word from each drop-down menu. the middle value of the data set is a measure and is called the part a: center b: spread part b: mean a: mean absolute deviation b: median c: range

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