Answer: 
Step-by-step explanation:







They will have the same solution because the first equation of system b
is obtained by adding the first equation of system a to 4 times the
second equation of system a.
£555.84
1% of the original value ×20 is £92.64. Add that to the original value (£463.20)
∠DOC is the average of the given angle values,
(170° +44°)/2 = 107°
∠DOB is the supplement to that,
180° -107° = 73°
The appropriate choice is
B) 73°
He wants to believe that he can change his circumstances by being in the right place at the right time.