If [ a ] = 5 cm , and [ b ] = 3a cm , find [ a + b ]

ANSWER=(Crying)

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- Jan 5th 2011, 06:29 PMDragonnicAlgebra problem dealing with lengths
If [ a ] = 5 cm , and [ b ] = 3a cm , find [ a + b ]

ANSWER=(Crying) - Jan 5th 2011, 06:31 PMpickslides
$\displaystyle \displaystyle a = 5, b=3a= 3\times 5 = 15 \implies a+b = 5+15=\dots$

- Jan 5th 2011, 06:34 PMDragonnic
the answer is?

- Jan 5th 2011, 07:32 PMpickslides
Take a guess, i dare you!