Ebony G.

asked • 12/03/16

A=Vf-Vi/tf-ti solve for tf

The f's and the i's are subscripts. 

1 Expert Answer

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Mark M. answered • 12/03/16

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A = (Vf - Vi) / (tf - ti)
A(tf - ti) = (Vf - Vi)
Atf - Ati = (Vf - Vi)
Atf = Vf - Vi + Ati
 
Can you do the last step?
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Ebony G.

No, I know that I would have to cancel out, right? But I don't know which or how. 
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12/03/16

Mark M.

"Cancel" is not an algebraic operation. Divide both sides by "A."
If you are in precalculus you should know how to solve for a variable - usually learned in Algebra 1.
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12/03/16

Ebony G.

So the answer then would be tf = Vf -Vi+ ti/a? Sorry, thank you for your help! 
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12/03/16

Mark M.

You must enclose the entire numerator in parentheses, (       ) / A
You are welcome!
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12/03/16

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