The expression
1 answer:
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Answer:
Serina should have solved for x in the second equation because it has a coefficient of 1.
Step-by-step explanation:
we have
----> equation A
---> equation B
we know that
To solve the system of equations in the most efficient way, solve for x equation B and then substitute the value of x in equation A
so
----> equation C
substitute equation C in equation A
solve for y
Find the value of x
substitute the value of y in the equation C
The solution is (3,4)
therefore
Serina should have solved for x in the second equation because it has a coefficient of 1.
To find how many hours Sonia work on her science project,we can multiply the working hours of Tony by the times Sonia did:
Therefore Sonia work on her science project for 5 5/6 hours.
Hope it helps!
Therefore Sonia work on her science project for 5 5/6 hours.
Hope it helps!