Saturday

March 28, 2015

March 28, 2015

Posted by **Anonymous** on Saturday, January 21, 2012 at 4:06am.

- algebra -
**Reiny**, Saturday, January 21, 2012 at 9:36amRate of A = 60 nails / 20 sec = 3 nails/sec

rate of B = 50 nails / 10 sec = 5 nails/sec

combined rate = 8 nails/sec

time at combined rate = 400/8 seconds

= 50 seconds

**Answer this Question**

**Related Questions**

math1 - (ii) A factory has two machines. Past records show that the first ...

Math - A factory has 3 machines that produce the same item. Machines 1 and 2 ...

mathematics - A bell rings every 2 seconds, and a bird chirps every 3 seconds. ...

Math - A bell rings every 2 seconds, and a bird chirps every 3 seconds. If the ...

statistics - A machine produces 49 titanium bolts every 2 hours. At this rate ...

Health Physics - As a result of doing work, a person supplies a machine with ...

Physics - As a result of doing work, a person supplies a machine with 1100 J of ...

physics - As a result of doing work a person supplies a machine with 1100 J of ...

math (NEW ANSWERS) - identify the fraction that is equivalent to 3/8. A.15/32 B....

math - a red light winks every 6 seconds, a white one every 10 seconds, and a ...