Question 330897
To be complementary means that the angles add up to 90 degrees
therefore  <1 + <2=90 also since m<1=5x-9 and m<2=4x
then 5x-9 + 4x =90  and 9x-9=90 and x=99/9=11 so plug x=11 in 5x-9 and 4x to get your answer