Answer:
A pound of potato costs $3.10
A dozen egg costs $5.5
A wheel of cheese costs $6.25
Step-by-step explanation:
Represent
- a dozen egg with D
- a wheel of cheese with W
- a pound of potato with P
For Adam:
---- (1)
For Barry:
---- (2)
For Charles:
---- (3)
Make D the subject in (2)
Substitute 36.50 - 10P for D in (3)
Collect Like Terms
Solve for P
Substitute 3.1 for P in
Substitute 3.1 for P and 5.5 for D in
Solve for W
Answer:
10 hours
Step-by-step explanation:
Let 
represent the distance the train heading north has traveled
Let 
represent the distance the train heading south has traveled
Let 
represent the number of hours that has passed
It is 729
We get this by doing 3x3x3x3x3x3
Answer:
6
Step-by-step explanation:
-3+10-1
10-4
=6
hope this helps
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