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Question 908390: A fireworks shell is shot straight up with an initial velocity of 80 feet per second. Its height s after t seconds is given by the equation
s = 80t − 16t2.
If the shell is designed to explode when it reaches its maximum height, how long after being fired, and at what height, will the fireworks appear in the sky?
time=_______ sec
height=_________ft
Click here to see answer by Alan3354(69443)

Question 908386: A passenger train leaves a depot 2 hours after a freight train leaves the same depot. The passenger train is travelling 10 mph faster than the freight train. Find the rate of each train if it takes 6 hours for the freight train to catch up.
Click here to see answer by lwsshak3(11628)

Question 908477: Suppose it took 19 riders a total of 11 days and 21 hours to ride from St. Joseph to Sacramento. If they all rode the same number of hours, how many hours did each rider ride?
Click here to see answer by richwmiller(17219)

Question 908489: two jets are traveling toward each other and are 3400 km apart. one jet is flying at 875 km/h. the other jet is flying at 825 km/h. In how many hours will the jets pass each other?
Click here to see answer by rfer(16322)

Question 908503: A chef is using a mixture of two brands of Italian dressing. The first brand contains 10% vinegar, and the second brand contains 15% vinegar. The chef wants to make 360 milliliters of a dressing that is
13% vinegar. How much of each brand should she use?
Click here to see answer by richwmiller(17219)

Question 908494: Dan left downtown greensboro, and three hours later, Sara left going 51 mph faster to catch up. after another two hours, Sara caught up. Find dan's average speed
Click here to see answer by ankor@dixie-net.com(22740)

Question 908531: An object is released from rest on a planet that has no atmosphere. The object falls freely for 3 m in the first second. What is the magnitude of the acceleration due to gravity on the planet?
a. 3 m/s^2
b.1.5 m/s^2
c. 6 m/s^2
d.12.0 m/s^2
e. 10 m/s^2
Click here to see answer by Alan3354(69443)

Question 908523: a person driving along the road moves at the rate of 54 miles per hour how far does the person drive in 3.5 hours ?
Click here to see answer by Alan3354(69443)

Question 908553: Allison drove to visit her aunt who lives 174 miles away. It took her 3 hours to get there. What was her average driving speed?

Click here to see answer by solver91311(24713)

Question 908555: Two planes, which are 2320 miles apart, fly toward each other. Their speeds differ by 80 mph. If they pass each other in 4 hours, what is the speed of each?

Click here to see answer by richwmiller(17219)

Question 908533: car A travels at 20 mph and car B travels at 15 mph; car A is 200 m behind car B; how long does car A have to travel before it catches up with car B?
Click here to see answer by richwmiller(17219)

Question 908568: What is the minimum speed (mph) for a bicyclist to get to work in forty five minutes if his work is 15 miles away?
Click here to see answer by jim_thompson5910(35256)

Question 908577: I am really bad with math/word problems. This is the problem, can you please help me to understand.
An airplane flew for 4 hours with a 20 mph tail wind. The return flight against the same wind took 5 hours. What was the speed of the plane if there was no wind?
Click here to see answer by josgarithmetic(39630)

Question 908572: How many integers satisfy this inequality: 2 \cdot x^{2}+5 \cdot x-12<0
Click here to see answer by Fombitz(32388)

Question 908569: (3x + 2)(2x - 1) > (5x - 2)(2x + 1)
Click here to see answer by Fombitz(32388)

Question 908598: A boat travels 168 miles downstream then turns around and travels 168 miles back to the starting position (336 miles total). The trip downstream took 12 hours while the trip back took 14 hours. Solve as a linear equation and find the speed of the boat when traveling downstream and the speed of the boat when traveling back.
Click here to see answer by ewatrrr(24785)

Question 908590: The perimeter of a rectangle is 42m. The length of the rectangle is 3m less than twice the width. Find the dimensions of the rectangle.
Click here to see answer by ewatrrr(24785)

Question 908589: The width of a rectangle id five more than twice the length, and the perimeter is 34. Find the dimensions.
Click here to see answer by ewatrrr(24785)

Question 908666: A truck took 6 minutes to travel between two warehouses that are 3 miles apart. what was the speed of the truck?
Click here to see answer by Alan3354(69443)

Question 908657: How far will a sports car traveling at 78 miles per hour go in 4 1/2 Hours?
Click here to see answer by Alan3354(69443)

Question 908667: A truck ordered to pick up at a factory 5 miles away. If the truck travels at an average speed of 40 miles per hour, the time it takes the truck to travel from one delivery to the other is?
Click here to see answer by Alan3354(69443)

Question 908622: two cyclists jumping at six two points , 306km away from each other and ride together. one traveling at 25km / h and the other at 26km / h . calculated using an equation to set the time they will meet each other
Click here to see answer by Alan3354(69443)

Question 908668: a driver averages 60 mph in going a distance of 240 miles. he made the return trip over the same distance in 6 hours. what was his average speed the entire trip?
Click here to see answer by ewatrrr(24785)

Question 908669: A truck completes a 10 mile trip in 20 minutes. If it does one half the distance at a speed of 20 miles per hour, then its speed for the remained of the distance must be....mph?
Click here to see answer by ewatrrr(24785)

Question 908644: Hans rides his bike to school everyday. 10 minutes after leaving home he is 8 miles from school. 15 minutes after leaving he is 7.25 miles from school.
a] write an equation that gives his distance from the school as a function of time.
b] how far from school is he after 18 mins?
c]when does he arrive at school? which part of function describes that?
Click here to see answer by richwmiller(17219)

Question 908707: how many miles do you travel at the speed of 550 mph
Click here to see answer by Fombitz(32388)

Question 908714: Question 3.3. Tran drove his car at a constant speed of 55 miles per hour.
Which is an equation for the distance Tran drove?
(Points : 1)
55d=t
d=55t
t/d=55
55/d=t

Click here to see answer by JulietG(1812)

Question 908573: a car travels 1 km in 1 minute. to travel 1 km in 40 seconds, by how many percent must the speed of the car be increased?
Click here to see answer by Alan3354(69443)

Question 908722: If an ambulance drives to a distant hospital at 100 mph and then returns at at 60mph, what is the average speed of the round trip?
Click here to see answer by Alan3354(69443)

Question 908761: a train left detroit and traveled west at 70 km/h. two hours later, another train left detroit and traveled east at 90 km/h. how many hours had the first train traveled when they were 1430 km apart?
please show the steps also!
Click here to see answer by JulietG(1812)

Question 908581: The time for the bus trip between two towns is 45 minutes shorter than the time for the train trip between the same two towns. if the towns are 360 km apart and the train speed is 15km/h slower than that of bus, find the speed of the bus in km/h.
Click here to see answer by josmiceli(19441)

Question 908774: How many hours will it take to drive 672

Click here to see answer by Alan3354(69443)

Question 908776: It took a crew 1 h 4 min to row 1 km upstream and back again. If the rate of flow of the stream was 7 km/h, what was the rowing speed of the crew in still water?
Click here to see answer by richwmiller(17219)

Question 908810: If Katy runs at a pace of 4 mph, how many miles can she run in 8 hours?

Click here to see answer by jim_thompson5910(35256)

Question 908841: You are biking at a speed of 18 miles per hour. You are three miles behind your friend, who is biking at a speed of 12 miles per hour. Write and solve an equation to find the amount of time it takes for you to catch up to your friend.
Click here to see answer by richwmiller(17219)

Question 908850: my friend karla and i like to ride bikes. she lives about 6 miles away from me. one day we decide to meet along the greenways trail that we both would travel to get to the others home. since we are very competitive, I want to reach karla at the pont where i have traveled 3.6 miles so that i can boast that i rode faster than she did. I anticipate that karla will ride at 12 mph. if we leave our house at the same time, how fast must i average to accomplish my goal
Click here to see answer by richwmiller(17219)

Question 908797: It took a crew 4 h 30 min to row 8 km upstream and back again. If the rate of flow of the stream was 7 km/h, what was the rowing speed of the crew in still water?
Click here to see answer by richwmiller(17219)

Question 908882: A car leaves Oakland for Las Vegas traveling an average of 40mph. Two hours later, a truck leaves the same place in Oakland for Las Vegas at 60mph. How long will it be before the truck overtakes the car?
Click here to see answer by richwmiller(17219)

Question 908887: A train leaves Mt. Carmel going west at 35 mph. Two hours later, a second train leaves Mt. Carmel traveling west at 45 mph on a track parallel to the first train. How far from Mt. Carmel will the two trains meet?
Click here to see answer by richwmiller(17219)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 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23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 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30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 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36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620