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Question 473510: Carrie can inspect a case of watches in 5 hours.James can inspect the same case of watches in 3 hours.After working alone for 1 hour,Carrie stops for lunch.After taking a 40 minute lunch break,Carrie and James work together to inspect the remaining watches.How long do Carrie and James work together to complete the job?
(A)1 hour and 30 minutes
(B)1 hour and 45 minutes
(C)2 hours
(D)2 hours and 15 minutes
(E)2 hours and 30 minutes
Thank you so much!
Click here to see answer by MathTherapy(1479)

Question 473570: Find the distance travelled by a car if it travelled
for 2 1/2 hours at a constant rate of 85 kph
Click here to see answer by oberobic(2304)

Question 473572: in a stream whose current flows at the speed of 3 km/hr ,a man rowed upstream and returned to his starting point in 6.25 hrs .If the man rows at a speed of 5 km/hr in still water,how long did he row upstream?
Click here to see answer by stanbon(57940)

Question 473629: how long would it take to cover 4 miles flying at 210 mph
Click here to see answer by Alan3354(31487)

Question 473667: A girl moves with the speed of 6km/h for 2hrs and with the speed of 4km/h for the next 3hr.Find the average speed of the girl and the total distance moved.
Click here to see answer by Alan3354(31487)

Question 473569: Find the distance travelled for 2 1/2 hours at a constant rate of 85 kph

Click here to see answer by Alan3354(31487)

Question 473576: One third of a certain journey was covered at the speed of 25 km per hour. One forth at the rate of 30 km per hour and the rest at the rate of 50 km per hour. find the average per hour of the whole journey?
Options-
1. 33 1/3 km/hr
2. 25 km/hr
3. 60 km/hr
4. 65 km/hr
5. none.
please answer it and explain it.
Thanks.
Click here to see answer by Alan3354(31487)

Question 473708: a train travel 69 kilometers in one hour.How far can it travel in 4 hours

Click here to see answer by ashleighb84(7)

Question 473719: driving at 43 mph one cover 18 miles in
Click here to see answer by jorel1380(2518)

Question 473746: A student tries to solve the problem:how long does it take a car to travel 240 miles if the car's rate is 60 mi/h? The student uses unit analysis to check problem. Which set of units is correct?
a. h over mi/h
b. mi/h over mi
c. mi over mi/h
d. mi/h over h
Click here to see answer by Theo(3504)

Question 473754: A boat travels 30 miles upstream and 30 miles downstream. The total time for both parts of the trip is 8 hours. the speed of the boat in still water is 8 mph. Find the speed of the current.
I have worked this problem 2 different ways and came up with 2 different answers both with radicals.
1. 30=(8+r)t <~~ I solved this one for t=30/(8+r)
30=(8-r)t
30=(8-r)(30/(8+r) the answer I got was 8+or- 2(squareroot of 15)
2. I used one from the website as a reference and worked it like this...
Current = X
upstream - x+8
downstream - 8-x
30/(x+8)+30/(8-x)= 8
LCM=(x+8)(8-x)
the answer I got was 2(squareroot of 31)
Where am I going wrong!?
Click here to see answer by ankor@dixie-net.com(15745)

Question 473844: driving at 37mph, one would cover 17 miles in how many seconds?
Click here to see answer by stanbon(57940)

Question 473957: A biker bikes 2.7 hours to the city. Bikerbikes .9 hrs more coming back at 3 miles per hours slower. What is the total distance biker biked?
Click here to see answer by josmiceli(9817)

Question 474006: How Many seconds does it take to travel 18 miles moving 35 miles an hour
Click here to see answer by mananth(12270)

Question 473975: Suppose a car and a truck leave from joburg. the car leaves at 09:00 and the truck leaves 45 minutes earlier. the car travels at 120km/h and the truck at 90km/h. how far away from Joburg will they meet?
Click here to see answer by mananth(12270)

Question 474046: If car 1 leaves @ 50mph..Car 2 leaves from the same point after car 1 reaches those miles.. how long until car 2 reaches car 1.. How many minutes?
Click here to see answer by Alan3354(31487)

Question 474127: A rowing team rowed with the current for 2 hours and travelled 40 Km. Rowing against the current the team travelled 16 Km in 2 hours. Find the team‘s rowing rate in calm water and the rate of the current?
Click here to see answer by Alan3354(31487)

Question 474137: IF car 1 leaves at 50mph from one spot and car 2 leaves at 60mph from the same spot after car 1 reaches miles.. How long until car 2 reaches car 1? How many minutes?
Click here to see answer by ankor@dixie-net.com(15745)

Question 474116: At 06:00 hours two joggers start from opposite ends of an 8- km course. One jogger is running at 4km/hour and the other is running as a rate of 6km/hour .At what time will the joggers meet?
Click here to see answer by ankor@dixie-net.com(15745)

Question 474118: A passenger train leaves a station 2 hours after a freight train leaves the same station . The freight train is 20km/hour slower than the passenger train. Find the rate of each train if the passenger train overtakes the freight after 3 hours
Click here to see answer by ankor@dixie-net.com(15745)

Question 474189: At what speed must a biker return from Town B to Town A, a distance of 30 miles, if the trip there took 2 hours and 30 minutes, and he wishes to average 15 miles per hour for the entire trip?
Click here to see answer by ewatrrr(10682)

Question 474145: if p/q=(2/3)^3+(3/2)^-3 then what is (p/q)^3-10 ??????????
Click here to see answer by Tatiana_Stebko(1326)

Question 474026: Two bicyclist riding on a circular riding track start at the same time. Oce can make the full circle in 8 minutes. The other takes 10 minutes to make a full circle. How long will it take the fast bicyclist to catch up again with the slow bicyclist?
Click here to see answer by ankor@dixie-net.com(15745)

Question 474332: hooks law states that the distance d that a spring is stretched by a hangin object varies directly as the weight w of the object. if a spring is stretched to 40 cm by a 3-kg barbell, what is the distance stretched by a 5-kg barbell?
Click here to see answer by stanbon(57940)

Question 474297: Two planes are 60 kilometers apart. Flying towards each other, they meet in 10 minutes. When flying in the same direction (at the same speeds as before), the faster plane overtakes the slower plane in 30 minutes. What is the speed of each plane in kilometers per hour?
Click here to see answer by mananth(12270)

Question 474385: A motorboat traveling with the current can go 24 m. in 2 hrs. Against the current it takes 3 hrs. to go with the same distance. Find the rate of the motorboat in calm water and the rate of the current?
Click here to see answer by mananth(12270)

Question 474354: At the beginning of a walk, Roberto and Juanita are 4.4 miles apart. if they leave at the same time and walk in the same direction, Roberto overtakes Juanita in 11 hours. If they walk towards each other, they meet in 1 hour. What are their speeds?
Click here to see answer by mananth(12270)

Question 474398: Nasser rode his bicycle 66 miles in 4.5 hours. for the first 40 miles he averaged a certain rate, and then for the last 26 miles he reduced his rate by 3 miles per hour. find his rate for the last 26 miles.
Click here to see answer by mananth(12270)

Question 474433: It took the pilot an hour and a half to make a flight of 240 miles when flying against a headwind. The return trip took an hour and twelve minutes (the wind had not shifted nor changed its speed). What was the spped of the wind?

I have to solve this in Cramer's Rule and I know the process of solving it using that method, but my problem is that I don't or I'm confused on how to form the two equations needed.
Click here to see answer by Theo(3504)

Question 474436: Two cars start at the same place. They drive in opposite directions for 11 miles, they both turn to their left and drive 6 miles, then they both turn to their left and drive 3 miles, and stop. How far apart are they when they stop?
Click here to see answer by Theo(3504)

Question 474505: driving at 38 mph how long would it take to travel 18 miles?
Click here to see answer by rfer(12726)

Question 474518: If traveling 52mph how long will it take to go 19 miles?

Click here to see answer by sofiyac(695)

Question 474587: A cab driver drove from the airport to a passenger’s home at an average speed of 55 miles per hour. He returned to the airport along the same highway at an average speed of 45 miles per hour. What was the driver’s average speed over the entire trip?
Click here to see answer by jorel1380(2518)

Question 474449: A can run 2 kilometers for 6 minutes while B can run it for 7 minutes. B has a 1 minute headstart, how many minutes would it take A to overtake B?
Click here to see answer by ankor@dixie-net.com(15745)

Question 474664: A motorboat travels 268 km in 4 hours going upstream.It travels 420 km going downstream in the same amount of time. What is the rate of the boat in still water and what is the rate of the current?
Click here to see answer by stanbon(57940)

Question 474731: if your driving 40 mph to somewhere thats 60 miles away how long will it take to get there ?
Click here to see answer by rfer(12726)

Question 474798: Wallace and Vernonville are 208 miles apart. A car leaves Wallace travailing towards Vernonville, and another car leaves Vernonville at the same time, traviling towards Wallace. The car leaving Wallace avarages 10 miles per hour more than the other, and they meet after 1 hour and 36 minutes. What are the avetage speeds of the cars?
Click here to see answer by mananth(12270)

Question 474799: At the beginning of a walk, Roberto and Juanita are 3.3 miles apart. If they leave at the same time and walk in the same direction, Roberto overtakes Juanita in 11 hours. If they walked towards each other, they meet in 1 hour. What are their speeds?
Click here to see answer by mananth(12270)

Question 474516: A car and a truck simultaneously leave two towns 364mi apart am head toward each other. The car travels 70mph and the truck drives 10mph slower. How long will it take the two to meet?
Click here to see answer by ankor@dixie-net.com(15745)

Question 474895: Two cyclists leave towns 70mi apart at the same time and travel toward each other. One cyclist travels 3mi/h faster than the other. If they meet in 2 hours, what is the rate of each cyclist?
Click here to see answer by lwsshak3(6742)

Question 474891: Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels 16 miles per hour slower than the westbound train. If the two trains are 900 miles apart after 5 hours, what is the rate of the eastbound train?
Do not do any rounding.
Click here to see answer by lwsshak3(6742)

Question 474989: Two planes leave the same airport and go in opposite directions at
the same time, at 600 mph and 350 respectively. In how many hours
will they be 2850 miles apart?
Click here to see answer by mananth(12270)

Question 475137: On Monday, Roger drove to work in 2 hours. On Tuesday, he averaged 15 miles per hour more, and it took him 30 minutes less to get to work. How far (in miles) does he travel to work?
Click here to see answer by solver91311(17059)

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