What is the sum of the first 9th terms [S(9)]

1
∑ 5( 2n ) = 10+ 5 + 5/2 + 5/4 + 5⁄8 + + 5/128 i=-9

step-by-step explanation:

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