What is the sum of a 7-term geometric series if the first term is -6, the last term is -24 576, and the common ratio is 4?

and yes, we know the that the last -6*4⁶ = -24576, however we don't need it for the sum equation.

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.

the answer to 1/4x+5/3x-4=2-1/12x is x=3

hope this if needed hmu