The local youth club has a stage for karaoke competitions. The main stage is a square. The technical crew needs to increase the length by 2 feet and the width by 1 foot for their equipment. A plan for the stage is shown below. Write expressions for the area of each part of the stage.

Write an expression for the total area of the stage.

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

it would be 6xy and -16xy.

there is no grid

step-by-step explanation: