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Question 77738: Science and medicine. A passenger train can travel 325 mi in the same time a freight train takes to travel 200 mi. If the speed of the passenger train is 25 mi/h faster than the speed of the freight train, find the speed of each.
Click here to see answer by stanbon(57203)

Question 77772: A high school computer club needs to raise $1,200.00 divided equally amongst the members. When 8 new members join, the individual amount is reduced by $7.50. How many members are in the club?
Here is what I have done so far:
X is the original number of members and X + 8 is the new number of members.
The total amount to raise never changes. 1,200/X is the original amount each member would need to contribute and 1,200/X + 8 is the new amount.
I am not sure how to set this up and solve to find the number of members. Your help would be much appreciated. Thanks
Click here to see answer by checkley75(3666)

Question 77811: The police discover the body of a murder victim. Critical to solving the crime is determining when the murder was committed. The coroner arrives at the murder scene at 12:00 P.M. She immediately takes the temperature of the body and finds it to de 94.6 degrees. She then takes the temperature 1 hour later and finds it to be 93.4 degrees. The temperature of the room is 70 degrees. When was the murder committed?
Click here to see answer by stanbon(57203)

Question 77808: The difference between two positive integers is 52. One integer is three times as great as the other. Find the integers.
Click here to see answer by fetter6(6)

Question 77809: Two angles are complementary. The second angle measures 32 degrees less than the first angle. What is the measure of the first angle?
Click here to see answer by ptaylor(2048)

Question 77739: Science and medicine. Ariana took 2 h longer to drive 360 mi on the first day of a trip than she took to drive 270 mi on the second day. If her speed was the same on both days, what was the driving time each day?
Click here to see answer by ptaylor(2048)

Question 77841: The sum of the digits of a two-digit number equals 1/7 of the number. If the digits are reversed, the new number is 27 less than the original number. Find the original number.
Click here to see answer by ptaylor(2048)

Question 77848: If the probablility of an event is .857, what is the probability that the event will not occur?
Click here to see answer by stanbon(57203)

Question 77842: In order for the following fraction to be defined, what value(s) can x not assume?
7/[(2/x)-(3/5)]
Click here to see answer by ptaylor(2048)

Question 78044: One number is 3 less than another. If 10 times the smaller number minus 4 times the larger numberis 24, find the two numbers.
Click here to see answer by stanbon(57203)

Question 78045: The lenghth of a rectangle garden is 9 ft less than 4 times its width. If the perimeter of the garden is 52 ft, find the dimensions of the garden
Click here to see answer by sulekha_hi(1)

Question 78023: 1. Find the length of a chorter leg of a right triangle if the longer leg is 10 miles more than the shorter leg and the hypotemuse is 10 miles less than twice the shorter leg.

2. The sum of two numbers is twenty-five and the sum of their square is three hundred and five. Find the number.
Click here to see answer by checkley75(3666)

Question 77975: Can you please help me with this problem?
How many 7-digit telephone numbers are possible if the first digit cannot be 0 and
(a) only odd digits may be used?
(b) the telephone number must be a multiple of 10, (that is, it must end in 0)
(c) the telephone number must be a multiple of 100?
(d) the first 3 digits are 481?
(e) no repetitions are allowed?
Thanks
Click here to see answer by stanbon(57203)

Question 78166: If one-half of one integer is subtracted from three-fifths of the next consecutive integer, the difference is 3. What are the two integers?
Click here to see answer by stanbon(57203)

Question 78171: A plane flies 720 mi against a steady 30 mi/h headwind and then returns to the same point with the wind. If the entire trip takes 10 hours, what is the plane's speed still in the air?
Click here to see answer by jim_thompson5910(28476)

Question 78300: the length of a rectangle is 3 times the width, and the perimeter is 22. find the dimensions of the retangle.
width is length is
Click here to see answer by mathman409(67)

Question 78299: one number is 800 less than 3 times a number, and their sum is 1,200. find the numbers.
Click here to see answer by stanbon(57203)

Question 78382: The only part of the height equation we have not discussed is the constant. You have probably noticed that the constant is always equal to the initial height of the ball (80 m in our previous exercises.) Now let’s have you develop a height equation. A ball is thrown upward from the roof of a building 100 m tall with an initial velocity of 20m/s.
h = -5t^2 + 20t +100
37. Science and medicine. How long does it take the ball to fall back to the ground?

Click here to see answer by stanbon(57203)

Question 78361: Construction. A garden area is 30 ft long and 20 ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400 ft^2, what is the width of the path?
Click here to see answer by ankor@dixie-net.com(15622)

Question 78380: This is a statistics problem, Can someone help? I am so confused.
An instructor gives a 100 point exam in which the grades are normally distributed. The mean is 60 and the standard deviation is 10. If there are 5% A's and 5% F's, 15% B's and 15% D's and 60% C, find the scores that divide the distribution into those categories
Click here to see answer by stanbon(57203)

Question 78406: A sporting goods store sells right-handed and left-handed baseball gloves. In one month, 12 gloves were sold for total revenue of $561. Right-handed gloves cost $45 and left-handed gloves cost $52. Howmany of each type of glove did they sell?
Click here to see answer by stanbon(57203)

Question 78381: Crafts. A solar collector is 2.5m long by 2.0m wide. It is held in place by a frame of uniform width around its outside edge. If the exposed collector area is 2.5m^2, what is the width of the frame, to the nearest tenth of a centimeter?
Click here to see answer by checkley75(3666)

Question 78414: If there are 17 different ingredients for a burrito, how many different combinations can be made? How many years would it take to try all the combinations?
Click here to see answer by stanbon(57203)

Question 78367: Science and Medicine. The equation h = -16t^2 gives the height of an arrow, shot upward from the ground with an initial velocity of 112 ft/s, where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to reach a height of 180 ft.
Click here to see answer by ankor@dixie-net.com(15622)

Question 78442: At Ajax Plastics the shipping clerk,the stockgirl, the sales woman, and the cashier are rose, hannah, gerladine, and mary jo, but mr. bigwid, the presiden of ajax, cant remember who is which. bigwig does, however, know these facts. Hannah likes both the saleswoman and the cashier, Mary Jo rides to work with the saleswoman and the cashier, and the shipping clerk comes to work alone. Rose is slightly jealus of the cashier.
Match up the eomwn with their occupations.
Click here to see answer by stanbon(57203)

Question 78491: The combined resistance of two resistors R 1 and R 2 in a parallel circuit is given by the formula Rt=_1______
1/R1+1/R2 Simplify the formula

The Rt, R1 and R2 have the t,1 and 2 below the R. I am confused as to what this means. First time I've seen them written like this before. Help!!!
Click here to see answer by stanbon(57203)

Question 78492: An experienced accountant can balance the books twice as fast as a new accountant. Working together, it takes the accountants 10 hours. How long would it take the expereinced accountant working alone.
Click here to see answer by stanbon(57203)

Question 78590: Joe is 10 years older than James. In 8 years, twice Joe's age will equal three times James's age. How old is each now?
{James is yrs., Joe is yrs.}

Click here to see answer by ankor@dixie-net.com(15622)

Question 78591: A man has two more nickels than dimes. He has $1.15 in all. How many coins of each kind does he have?
{dimes, nickels}

Click here to see answer by checkley75(3666)

Question 78588: The length of the base of an isosceles triangle is 4 inches less than the length of one of the two equal sides of the triangles. If the perimeter is 32, find the three sides of the triangle.

Click here to see answer by checkley75(3666)

Question 78587: One of two supplementary angles is five times the other. Find the angles.
(Recall that supplementary angles are angles whose sum is equal to 180 .)

Click here to see answer by bucky(2189)

Question 78586: One of two complementary angles is 4 more than the other. Find the angles.
(Recall that complementary angles are angles whose sum is equal to 90.)
Click here to see answer by ptaylor(2048)

Question 78655: Steve was born in 1950. HIs grandmother was born in a year which is the product of two prime numbers- one of which is one less than twice the other. in what year was Steve's grandmother born?
Click here to see answer by Edwin McCravy(8879)

Question 78741: A rectangular parking lot has a length of 3 yards greater than the width. The area of the parking lot is 180 square yards. Find the length and the width.
Click here to see answer by chitra(359)

Question 78740: The length of a rectangular sign is 3 feet longer than the width. If the sign's area is 54 square feet, find the length and the width.
Click here to see answer by bucky(2189)

Question 78739: A supporting wire is to be attached to the top of a 32 ft. atenna If the wire must be anchord 32 feet from the base of the attena, what length of wire is required?
Click here to see answer by tutor_paul(490)

Question 78777: A computer store received 2 shipments of software. The 1st shipment contained 12 word processing programs and 10 financial programs with a total value of $6520. The 2nd shipment, valued at $3940, contained 6 word processing programs and 7 financial programs. Find the cost of each program?
Click here to see answer by tutor_paul(490)

Question 78775: Shivam & Hakim went to cedar point for rides. Shivam used 20 tickets to ride the roller coaster, corkscrew 3 times and the Blue Streak twice. Hetal used 12 tickets to ride the corkscrew twice and the Bluestreak once. Howmany tickets were needed to ride Corkscrew and howmany tickets were needed for Blue streak?
Click here to see answer by mathdoc314(58)

Question 78804: If ten ounces of water evaporate from 40 ounces of a 15% saltwater solution, what percent of the new solution is salt?
Click here to see answer by stanbon(57203)

Question 78803: Four brothers decided to buy a stereo that cost $280. THeir contributions were in the ratio 4:2:3:5. What was the largest single contribution in dollars?
Click here to see answer by stanbon(57203)

Question 78802: Beth is 10 years old, and her dad is 40 years old. How many years ago was Beth 1/7 as old as her dad?
Click here to see answer by ankor@dixie-net.com(15622)

Question 78845: A common mistake when solving equations is the following:
The equation: 2(x-2) = x + 3
First step to solve: 2x-2=x + 3
write a clear explanation of what error has been made. What could be done to avoid this error
Click here to see answer by mathdoc314(58)

Question 78855: I hope you can help me.. I am learning algebra, however my teacher gave us this problem to due today.. My mother and father came up with 2 different answers.. I am confused.. Here is the problem..
Ten students in a class play soccer and 12 students play basketball. Seven students play both soccer and basketball. Half of the students in the class don't play either sport. How many students are in the class? (i did make a venn diagram ).. any help on this would be great.. thanks..VB
Click here to see answer by jim_thompson5910(28476)

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