Andre went hiking near his house. the first trail he hiked on took him 4.5 miles away from his house. the second trail he hiked took him 2.4 miles closer to his house. the thrid trail took him 1.7 miles further away from his house. after andre hiked the three trails, how far from his house was he?

He is 3.8 miles away from his house.

Explanation :

Distance the first trail took him away = (+) 4.5 miles

( We will show it with positive sign as it increase the distance away from the house)

Distance the second trail took him closer = (-) 2.4 miles

(We will show it with negative sign as it decreases the distance)

Distance the third trail took him far away = (+) 1.7 miles

Now , total distance = 4.5-2.4+1.7

                                  = 3.8 miles

∴  He is 3.8  miles far his house.

b

step-by-step explanation:

ez

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.