Tracy, joyce, mark and sarah collect key chains. they have an average of 68 keychains. joyce has half as many as mark. sarah has 28 fewer than the total number of keychains that joyce and mark have. how many keychains does mark have?

y=3n + 1

step-by-step explanation:

this is wrong because it says the second number is one less and i added one instead

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