Answer:
m=24°
Explanation:
it's a 90° angle so all the expressions and angles shown in the picture will add to 90°
this can b shown like
m+7+2m+11°=90°
now u just find what m is
m+7+2m+11°=90°
take away 11°
m+7+2m=79°
take away 7
m+2m=72
add all the m's together
3m=72
now divide by 3 to get m alone
m=24°