Answer:
111°
Step-by-step explanation:
Find Angle ACB then find angle DEC due to Isosceles triangle formation in CED.
Using the Property of Straight angel Subtract angle DEC from 180° to get 111°.
R = -2m + 11
S = n + 5
T = -m - 3n + 8
R - S + T
(-2m + 11) - (n + 5) + (-m - 3n + 8)
(-2m - m) + (n - 3n) + (11 - 5 + 8)
-3m - 2n + 14
Answer:
7
Step-by-step explanation: