There are 156 taking a boating safety course. the ratio of adults to students is 9 to 4. how many adults are taking the course?

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

the answer is 3/2 and for decimal: 1.5

hope i

-lavira: )