Answer:
Coach pug charges $45 only one time, and an additional of $20 per session.
So if you take x sessions, the total cost will be:
c(x) = $45 + $20*x
Dr. Doberman charges only $30 per session, then the cost for x sessions will be_
d(x) = $30*x
Now, which one is better for you?
We need to see the value of x such that:
d(x) = c(x)
$30*x = $45 + $20*x
$30*x - $20*x = $45
$10*x = $45
x = $45/$10 = 4.5
This means that if you take 4 sessions or less, is better the Dr. Doberman, because in this case we do not have an y-intercept.
If you want to have 5 sessions or more, is better Coach Pug, because the slope of the equation is smaller, so the costs for larger values of x will be smaller.
This is not true.
where is 
is any integer. So suppose we pick some value of 
other than these, say 
. Then
Note that:
I = 1, V = 5, X = 10, L = 50, C = 100
XX = 20, II = 2
20 + 2 = 22
XXII = 22
Find the number on the next page (pg.23)
23 = XXIII
XXIII is your answer
hope this helps
Yes you are correct with that answer
