Answer:
absolutely no idea if this is right but i put the first one
Step-by-step explanation:
Answer:
X-6
Step-by-step explanation:
Represent the unknown number with a variable then introduce the minus sign
18- j
19- c
20- h
Hope this is right lol
Answer:
The domain is discrete
Step-by-step explanation:
Given

Required
What type of domain is it?
<em>Based on the given options, the domain is continuous.</em>
From the question, we understand that x represents the hours spent in climbing the rock.
The climber can decide to climb for 1 hour, 2 hours, ½ hour, ⅓ hour, ¼ hour, etc..
A domain is said to be discrete if it can only take integers (i.e. whole numbers), if otherwise, it is continuous;
So, since x is not limited to only whole numbers, then we can conclude that the domain of x is continuous
3(x+3)-2x
Distribute the 3
3x+9-2x
Combine like terms
x+9
Set equal to zero if you need to do this part
x+9=0
Get x by itself
x=-9