In a study designed to test the effectiveness of magnets for treating back pain, 20 patients were given a treatment with magnets. Pain was measured using the VAS scale. The average VAS reading of the sample was 5.0 with a standard deviation of 2.9. Construct a 95% confidence interval of the true mean.
Z D/2 = 2.09

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

noncoplanar points are points that do not lie on the same line.

step-by-step explanation:

a bicycle manufacturer uses the given expression to model the monthly profit from sales of a new model of bicycle, where x is the selling price of one bicycle, in dollars.