7 A principal estimated that 400 people attended the performance of the school play. After counting the
tickets, he found that 423 people attended. What was
the percent error in the principal's estimate?
Show your work.
575

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)

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