Answer:
x= 5<em>/9</em>
Step-by-step explanation:
y=-9x+5
0=-9x+5
9x=5
x=5/9
The equation of Q(n) is 
<h3>How to determine the formula of Q(n)?</h3>
The functions are given as:


From the question, we understand that:
d = P(n)
This means that:
d = 88n + 23
Substitute d = 88n + 23 in R(d)

Also, from the question
Q(n) = R(n)
So, we have:

Hence, the equation of Q(n) is 
Read more about composite functions at:
brainly.com/question/10687170
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Answer:
60 packets
Step-by-step explanation:
Given that :
Unit cost of 20 packets
$5.49 / 20 =$0.2745
Unit cost of 60 packets :
$10.97 / 60 = $0.1828333
Unit cost of 90 packets :
$18.95 / 90 = $0.2105555
The 60 packets has the least cost per unit, hence it is the best buy.
Answer:
10 and 4
Step-by-step explanation:
2/5 of 10 is 4 so that is it
Answer:
First option
Step-by-step explanation:
