Need help with standard deviation questions!!

What type of mathematics is this?

Step-by-step explanation:

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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pls mark as brainliest

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