Answer:
10x−31
Step-by-step explanation:
Let's simplify step-by-step.
10x+9−40
=10x+9+−40
Combine Like Terms:
=10x+9+−40
=(10x)+(9+−40)
=10x−31
Hope this helps and can you please give me brainliest ;-)
14.4, if my calculator was correct
Answer:
16
Step-by-step explanation:
if x=23, 23-7=16
81 is the perfect square because 9 * 9