Start by putting two coins on each side of the scale. If one side is higher, then the light coin must be in that pair (use a second weighing to determine which of that pair is the lightest.)
If the initial weighing shows the two pairs to be even, discard those four and go to the three others. Put two of the coins on the scale - one on each side. If one side stays higher, that coin is your light one. If however they are equal, the final unweighed coin must be the lighter coin.

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3 years ago

Evaluate 4r(t – v) if r = 3, t = 5, and v = 2.

V125BC [204]

4r(t-v) r=3, t=5, and v=2
4*3(5-2)
12(3)
36

7 0

3 years ago

Read 2 more answers

A band expects to put 12 songs on their next CD. The band writes and records 25% more songs than they expect to put on the CD.

melamori03 [73]

They only have 3 left on the final CD:

12 + (.25 x 12) = 15

15 + (.8 x 15) = 3

I hope this helped!

~Travis

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