Write the algebraic expression described. Simplify if possible.
-A 21-centimeter piece of rope is cut into two pieces. If one piece is z centimeters long, express the other length as an algebraic expression in z.
A) (z - 21) cm
B) (z + 21) cm
C) (21 - z) cm
D) (21 - 2z) cm

Question

Quizplus · Accepted Answer

The total length of the rope is 21 cm. If one piece is z cm long, the other piece must be the total length minus this piece, which is expressed as (21 - z) cm.

Write the Algebraic Expression Described. Simplify If Possible