I’m confused on how to work this out?

x = 54

Step-by-step explanation:

The angles of a triangle add up to 180.

This is an isosceles triangle so the angles at the base of the 2 congruent sides are equal.

One of the angles at the bottom is 63 deg. so the other one is 63 too.

We solve for x knowing the first fact.

x = 180 - (63 + 63) = 54

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.

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation: