21 - 16.75 is 4.25. Do the problem on a calculator and you'll get it.
Answer:
Mistake in Line 2
Step-by-step explanation:
Line 1
7(6) ÷ 5 + 42
Line 2
7(6) ÷ 5 + 16
Line 3
42 ÷ 5 + 16
Line 4
42 ÷ 21
Line 5
2
To simplify any expression we use order of operation
Line 1 is 7(6) ÷ 5 + 42
Order of operation is PEMDAS
First we start with parenthesis
so we multiply 7(6) in line 2
7*6- 42
So Line 2 is 42 ÷ 5 + 42
Hence there is a mistake in Line 2
Answer: 
Step-by-step explanation:
Step 1:-
Given equations are y=-2 x+30........(1)
another equation is y=4 x ..........(2)
Step 2:-
solving these two equations (1) and (2)
Equating both equations are 


Step 3:-
The final answer is 
Answer:
6 is most directly associated with the flow rate of customers
Step-by-step explanation:
Reason:
0.25 is the number of customers in the gift shop at a given point of time is WIP inventory
7.5 is the average time spent by customer in the shop and it is the throughput time.
Flow rate = WIP inventory/Throughput time
=0.25/7.5
= 0.0333 per minute = 2 per hour or 6 per 3 hour as given in question.
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