Prove [1, Theorem 11.1.7]: Suppose that X and Y are nonempty finite sets of the same cardinality. Then a function X → Y is an injection if and only if it is a surjection. [Hint: Use the pigeonhole principle and proof by contradiction.]

a

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

answer: 800

step-by-step explanation:

i believe it is the square root of 122 because when you turn it on it's side, to where the 5 inches is on the bottom, it looks like it is the same length.