Answer:
6 hours
Step-by-step explanation:
500=165+55h
-165
335=55h
-------------
55
h=6.090909...
h=6 hours max
Answer: it has a 20% increase
Brian-90×5+85=535
Christina-90×5+65=515
So after 5 weeks Brian will do 535 push ups and Christina will have done 515.
Answer:

Step-by-step explanation:
Hello,
What you did is correct...

... and you found A by identifying the term in
to get A = 5, right?
<u>What about the other terms?</u>
<u />
We can then identify the like terms:
>>> term in 
A = 5
>>> term in x
-2A+3=B
>>> constant term
6 = 6
As we know that A=5 it means that B = -2*5-3=-13
Hope this helps.
Do not hesitate if you need further explanation.
Thank you