SOLUTION: Please help me to solve the following problems: Solve each proportion: 34) b/3=-3/4 Use a proportion to solve each problem: 44) Fast Food. If four out of five docto

Question 88388: Please help me to solve the following problems:
Solve each proportion:
34) b/3=-3/4

Use a proportion to solve each problem:
44) Fast Food. If four out of five doctors prefer fast food, thn ata convention of 445 doctors, how many prefer fast food?
Thank you very much-

Answer by checkley75(3666) (Show Source): You can put this solution on YOUR website!
B/3=-3/4 NOW WE NEED TO CROSS MULTIPLY. THUS:
4B=-3*3
4B=-9 NOW WE DIVIDE BOTH SIDES BY 4. THUS:
B=-9/4
B=-2.25
PROOF
-2.25/3=-3/4
-2.25*4=-3*3
-9=-9

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