Let

, where

and let

be any real constant.
Given this definition of scalar multiplication, we can see right away that there is no identity element

such that

because
PEMDAS so you do 3*4 which equals 12, then you add 8=20 20/2=10
Answer:
<h2>hope it helps you see the attachment for further information </h2>
Answer:
7x + 8
Step-by-step explanation:
2×2+7x+4
4 + 7x + 4
7x + 8
One metre=10 decimetres.
Therefore 30 metres = 30*10=300 decimetres.