Step-by-step explanation:

Let a=1, b=-12, c=-54
Use formula

You will get

Answer:
3285
Step-by-step explanation:
5x3144=15720
3990
15720+3990=19710
19710/6=3285
Yosef's average weekly fuel cost would be $2537.
<h3>What is the unitary method?</h3>
The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Yosef drove 12,900 miles last year. His truck's fuel efficiency averages 15 mpg.
Karla used 12900/15 = 860 gallons to drive 12900 miles.
The average cost of gas last year was $2.95 per gallon.
Therefore, Yosef's average weekly fuel cost would be
2.95 x 860 = $2537
Learn more about the unitary method;
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Answer:
58.03
Step-by-step explanation:
What I did first to make it easier was make 5.5 to .055 and when you multiply those two together you get 3.025 which if you round it up becomes 3.03 and when you add 55 you get 58.03
Answer:
2 1/20
Step-by-step explanation: