V(r)=c((r^3)-72.25r) solve for c

  c = V/((r^3)-72.25r)

Step-by-step explanation:

V is proportional to c, so you can simply divide by the coefficient of c.

  c = V/((r^3)-72.25r)

coins of silver or gold

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