Answer:
Lets say m is how many you type per minute and W is the time it would take to do 400 words
3om = 400
Step-by-step explanation:
Answer:No
Step-by-step explanation: 3x and 4y have different variables.
Answer:
A. add 81; 
Step-by-step explanation:
The perfect square formula

Rewrite expression
as follows:

So, to form a perfect square,
is missed.
When we add
we will get

Answer:
Step-by-step explanation:
option 4
Answer:
B = 135
Step-by-step explanation:
An octagon has 8 equal sides, and in total is 1080 degrees. Each angle is 135 degrees which adds up to 1080. Or:
135 × 8 = 1080.
Hope this helped.