SOLUTION: 5. How much pure antifreeze must be added to 12 gallons of
20% antifreeze to make a 40% antifreeze solution?
a.2 gallons
b.4 gallons
c.6 gallons
d.8 gallons
6. One computer
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-> SOLUTION: 5. How much pure antifreeze must be added to 12 gallons of
20% antifreeze to make a 40% antifreeze solution?
a.2 gallons
b.4 gallons
c.6 gallons
d.8 gallons
6. One computer
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Question 618385: 5. How much pure antifreeze must be added to 12 gallons of
20% antifreeze to make a 40% antifreeze solution?
a.2 gallons
b.4 gallons
c.6 gallons
d.8 gallons
6. One computer printer can print a company's mailing labels in
40 minutes. A second printer would take 60 minutes to print the labels. How
long would it take the two printers, operating together, to print the labels?
a.30 minutes
b.24 minutes
c.50 minutes
d.32 minutes
Hi,
How much pure antifreeze must be added to 12 gallons of
20% antifreeze to make a 40% antifreeze solution?
antifreeze = antifreeze
x = 4 gal
One computer printer can print a company's mailing labels in
40 minutes..A second printer in 60 minutes
Time Togeiher: PER min KEY
1/40 + 1/60 = 1/x
60x + 40x = 2400
100x = 2400 |Multiplying thru by 2400x so as all denominators = 1
x = 24 min
