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Question 1210651: Precalculus
Michael Sullivan
Section 1.1
Q. 67
A Ford Focus and a Freightliner truck leave an intersection at the same time.
The Focus heads due east at an average speed of 30 mph, while the truck heads due south at an average speed of 40 mph. Find an expression for their distance apart d (in miles) at the end of t hours.
Click here to see answer by ikleyn(53940)   |
Question 1210650: Precalculus
Michael Sullivan
Section 1.1
Q. 68
A hot-air balloon, headed due east at an average speed of 15 mph and at a constant altitude of 100 feet, passes over an intersection. Find an expression for the distance d (in feet) from the balloon to the intersection t seconds later
Click here to see answer by ikleyn(53940) |
Question 957182: A cruise ship can sail 25 mph in calm water. Sailing with the Gulf Stream, the ship can sail 256 mi in the same amount of time it takes to sail 144 mi against the Gulf Stream. Find the rate of the Gulf Stream.
Click here to see answer by ikleyn(53940) |
Question 955979: Michael drove to work on Monday at 45 mph and arrived one minute early. The employee drove to work on Tuesday, leaving home at the same time driving 40 mph and arriving one minute late. How far does Michael live from work? What speed does he need to drive to arrive 5 minutes early?
Click here to see answer by josgarithmetic(39838) |
Question 955979: Michael drove to work on Monday at 45 mph and arrived one minute early. The employee drove to work on Tuesday, leaving home at the same time driving 40 mph and arriving one minute late. How far does Michael live from work? What speed does he need to drive to arrive 5 minutes early?
Click here to see answer by n2(91) |
Question 955979: Michael drove to work on Monday at 45 mph and arrived one minute early. The employee drove to work on Tuesday, leaving home at the same time driving 40 mph and arriving one minute late. How far does Michael live from work? What speed does he need to drive to arrive 5 minutes early?
Click here to see answer by ikleyn(53940) |
Question 975870: A and B are playing tag . A stay still while B runs from the same spot at a rate 2 meters per second.
After 60 seconds B keeps running . A now runs after him at a rate of 3 meters per second.
How long has A run when he caught up to B
My solution
3 (t-60) = 2t
3t - 180 =2t
3t-2t =180
t = 180
Click here to see answer by ikleyn(53940) |
Question 1161528: A boy throws a stone from the top of a building 46.0 m above ground. The
stone is thrown at an angle of 33.0° below the horizontal and strikes the
ground 55.6 m away from the building, find the following: (a) Time of flight.
(b) Initial speed. (c) The magnitude and the direction of the velocity of the
stone just before it strikes the ground.
Click here to see answer by KMST(5399)  |
Question 299160: a plane flew 500 km from atlanta to louisville. when returning to atlanta the flight took 1/2 hour less time.if the rate to Louisville was 50km/hr faster than the rate returning, find the two rates in km/hr.
Click here to see answer by ikleyn(53940) |
Question 626102: The question is......Two jets leave at the same time,one is flying eat, the other west. the speed of the jet that is flying west is 75km/h faster than the speed of the jet flying east. in 3 hr they are 3075km apart. let w represent the speed of the plane travelling west and e represent the speed of plane travelling east. you need to know the speed of each plane. write a system of equation to model this situation
Click here to see answer by MathTherapy(10858)  |
Question 290678: Plane A and Plane B are 500 kilometres apart and flying towards each other. If plane A is travelling at a constant speed of 240 k/m and plane B is travelling at a constant speed of 360 k/m when will the planes meet?
Click here to see answer by ikleyn(53940) |
Question 287905: Jan and Tariq took a canoeing trip, traveling 6 mi upstream against a 2 mi/h current. They then returned to the same point downstream. If their entire trip took 4 h, how fast can they paddle in still water? [Hint: If r is their rate (in miles per hour) in still water, their rate upstream is r - 2 and their rate downstream is r + 2.]
Click here to see answer by josgarithmetic(39838) |
Question 287905: Jan and Tariq took a canoeing trip, traveling 6 mi upstream against a 2 mi/h current. They then returned to the same point downstream. If their entire trip took 4 h, how fast can they paddle in still water? [Hint: If r is their rate (in miles per hour) in still water, their rate upstream is r - 2 and their rate downstream is r + 2.]
Click here to see answer by ikleyn(53940) |
Question 284297: Fred and Desi left Steamtown Mall at 9:00 am and began walking in opposite directions. At 1:00 pm that same day they were 20 miles apart. If Fred walks 0.5 mph slower than Desi, what is Desi's speed of walking?
A. 2.25 mph B. 2.75 mph C. 3.5 mph D. 5 mph E. None of these.
Click here to see answer by mccravyedwin(421)  |
Question 284297: Fred and Desi left Steamtown Mall at 9:00 am and began walking in opposite directions. At 1:00 pm that same day they were 20 miles apart. If Fred walks 0.5 mph slower than Desi, what is Desi's speed of walking?
A. 2.25 mph B. 2.75 mph C. 3.5 mph D. 5 mph E. None of these.
Click here to see answer by josgarithmetic(39838) |
Question 284297: Fred and Desi left Steamtown Mall at 9:00 am and began walking in opposite directions. At 1:00 pm that same day they were 20 miles apart. If Fred walks 0.5 mph slower than Desi, what is Desi's speed of walking?
A. 2.25 mph B. 2.75 mph C. 3.5 mph D. 5 mph E. None of these.
Click here to see answer by ikleyn(53940) |
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