Question

a 23 centimeter piece of rope is cut into two pieces. If one piece is z centimeter's long, express the other length as an algebraic expression in z

Answer 1

`23 - z`

Explanation:

Given

`Length =23cm`

`One\ Piece = z`

Required

Derive an expression for the second piece

Represent the second piece with x,

So, we have:

`x + z = 23cm`

`x + z = 23`

Subtract z from both sides

`x + z - z = 23 -z`

`x = 23 -z`

Hence:

An expression for the second piece is
`23 - z`