Find the value of unknown angle

x + 50° + 70° = 180°

or, x + 120° = 180°

or, x = 180° - 120°

•°• x = 60°

Step-by-step explanation:

x + 50° + 70° = 180° ( Due to Straight line )

let y equal to

the total fare and x is the mile of taxi ride. so the equation is

y = 0.55x + 1.75

since susie has

$10 to spend for a taxi cab, so he can have

10 = 0.55x +

1.75

x = 15 miles of

taxi ride

so the system of

inequality is

10 < 0.55x +

1.75

x > 2