Find the exact length of the third side.

50

Step-by-step explanation:

Using the pythagorean theorem:

a²+b²=c²

30²+40²=c²

900+1600=c²

c²=2500

c=50

x = -2

y = 848

step-by-step explanation:

plug in the numbers

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.