Find the product of each expression using properties of complex numbers. 1. (x + 3i)(x − 3i) 2. (x − 4i)(x + 4i) 3. (x + 8i)(x − 8i)

An equation where variables are used to represent known values—function notation true or false

Icould really use some with this question.

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60