Answer:
Step-by-step explanation:
ΔXYZ
m∠X = 52°, m∠Y = 106°, m∠Z = 180° - (106° + 52°) = 22°
=
= 0.5
first one
Step-by-step explanation:
First you want to isolate the variable, do this by adding 18 to both sides. You're left with 12r = 13r + 36, then subtract 13r to get the variables alone. You're then left with -1r = 36, multiply by -1 to remove the negative. The final result would be (1) r = 36.