Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 213242: 5w^2-45 factored out completely
Click here to see answer by drj(1380)

Question 213308: Ticket Sales
Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office manager uses this information to anticipate staffing needs until the tickets sell out. You provide the manager with a quadratic equation that models the expected number of ticket sales for each day x. (x=1 is the day tickets go on sale). Tickets = -0.2x^2+12x+11
a.Does the graph of this equation open up or down? How did you determine this?
b.Describe what happens to the tickets sales as time passes?
c.Use the quadratic equation to determine the last day that tickets will be sold.(Note write your answer in terms of the number of days after ticket sales begin.)
d.Will tickets peak or be at a low during the middle of the sale?How do you know?
e.After how many days will the peak or low occur?
f.How many tickets will be sold on the day when the peak or low occurs?
g.What is the point of the vertex?How does this number relate to your answers in parts e and f?
h.How many solutions are there to the equation -2x^2+12x+11=0? How do you know?
i.What do the solutions represent? Is there a solution that does not make sense? If so, in what ways does the solution not make sense?
Click here to see answer by stanbon(57347)

Question 213173: A boy can row a boat at a constant rate of 3mi/hr in still water. He rows up-stream for 20 minutes and then rows down-stream, returning to his starting point in another 15 minutes. Find the total distance traveled.
Click here to see answer by stanbon(57347)

Question 213324: Solve for x in terms of the other letters. 4x(to the fourth power)y(to the fourth power) + 2x(squared)y(squared) + .75= 0
Click here to see answer by Alan3354(30993)

Question 213437: (x^2+7x)/2 =-3
I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.

Click here to see answer by drj(1380)

Question 213438: (x^2⁄2)- 4 – 6x = - 4
I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.
Click here to see answer by stanbon(57347)

Question 213436: Solve by factoring: 16x2 - 14x + 1 = -6x
I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.
Click here to see answer by rapaljer(4667)

Question 213435: Divide: (4 + 2i)/ (4 – 2i)
I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.
Click here to see answer by stanbon(57347)

Question 213434: Multiply: (1/7 – i)^2 I need help with this . Can someone please explain what to do for me using this example. I need to know the steps as well as how you got the answer. Thankyou for you time. Your are appreshated.
Click here to see answer by stanbon(57347)

Question 213428: f(x)=-3x^2 make a table and a graph

Click here to see answer by drj(1380)

Question 213552: how can i telln if a graph opens up or down by looking at the equation
Click here to see answer by rapaljer(4667)

Question 213552: how can i telln if a graph opens up or down by looking at the equation
Click here to see answer by drj(1380)

Question 213543: A box with an open top is to be constructed by cutting 3-inch squares from the corners of a rectangular sheet of tin whose length is twice its width. What size sheet will produce a box having a volume of 24in^3?
Click here to see answer by checkley77(12569)

Question 213520: a piece of wire 10 m long is to be cut into two pieces one of them is 2/3 as long as the other, how should the wire be cut ?
Click here to see answer by checkley77(12569)

Question 213589: Solve by using the quadratic formula.
(75/w^2) - (18/w) + 1 = 0
Click here to see answer by mathcrazygirl(1)

Question 213547: A college student has finished 49 credit hours with a GPA of 2.5. To get into the program she wishes to enter, she must have a GPA of 3.3. How many additional credit hours of 4.0 work will raise her GPA to 3.3?
Click here to see answer by ankor@dixie-net.com(15652)

Question 213788: I have a quadratic equation whos solution is 3+ 3 times radical 7i over six can this equation be reduced to 1+ radical 7i over two?
Click here to see answer by tutor_paul(490)

Question 213860: find the maximum or minimum and the value of x when it occurs using -b/2a (vertex) and then equation 10-10x-x^2
Click here to see answer by solver91311(16885)

Question 213846: 64x^6 - 1
Im confused.
Click here to see answer by nerdybill(6959)

Question 213902: Solve by using the quadratic formula.
(18/w^2) - (10/w) + 1 = 0
If your answer contains a radical, express it in simplified form.
Click here to see answer by drj(1380)

Question 213918: Solve by using the quadratic formula.
(18/w^2) - (10/w) + 1 = 0
If your answer contains a radical, express it in simplified form.
Do not convert to decimal form.
Click here to see answer by drj(1380)

Question 213950: Solve for T:
{t-1}^2 = {2t^2-8t+6}

***I know that this can only have at most 2 answers because the degree of the polynomial is 2. I know that {t-1}^2 is {t-1}{t-1} and that 2t^2-8t+6 is simplified to 2{t^2-4t+3}. I have tried to simplify it more but keep getting stuck and I know that one of the answers for t=1, but I cant find the other! Any help would be appreciated!
Click here to see answer by jim_thompson5910(28595)

Question 213832: Please help me solve for the indicated letter:
for r
s=1/3(pie)hr^2+4(pie)rh
Thank you
Click here to see answer by Alan3354(30993)

Question 213937: Completely factor the expression:
x^3+2x^2-4x-8
Click here to see answer by scott8148(6628)

Question 214042: 3x^2-19x+16=0
Click here to see answer by scott8148(6628)

Question 214041: Catarina and Tom want to buy a rug for a room that is 10 by 19 feet. They want to leave an even strip of flooring uncovered around the edges of the room.
How wide of a strip will they have if they buy a rug with an area of 52 square feet?
(10-2x)(19-2x)=52 <====not sure if that's how i set it up
Click here to see answer by scott8148(6628)

Question 214129:
Click here to see answer by jim_thompson5910(28595)

Question 214129:
Click here to see answer by drj(1380)

Question 214324:
Click here to see answer by Earlsdon(6287)

Question 214453: Solve
9x^2=18
Click here to see answer by rfer(12660)

Question 214441: a ball is kicked into the air and follows the path described by
h(t)-4.9t^2+6t+0.6. where t is the time in seconds and h is the height in meters abouve the ground. Detrmine the maximum height of the ball to the nearest tenth of a meter.
Click here to see answer by nerdybill(6959)

Question 214459: How do you find the x intercept and y intercept for quadratic functions and please give an example
thank you
monica
Click here to see answer by stanbon(57347)

Question 214480: Problem Solving
Yesterday the temprature started at 3 degrees Celsius,increased 5 degrees Celsius and dropped 15 degrees Celsius by midnight.What was the temperature at midnight?

PLEASE HELP ME I DONT GET IT!!!!
Click here to see answer by rfer(12660)

Question 214672: whats x2+4x+4=0
Click here to see answer by Earlsdon(6287)

Question 214670: Trains a and b are traveling in the same direction on parallel tracks. Train A is traveling at 80mph...? B is at 88mpr. Train A passes a station at 8:20pm. If train B passes the same station at 8:50pm; at what time will train B catch up to train A?
Click here to see answer by Alan3354(30993)

Question 214695: Solve. Round results to the nearest thousandth. x2 + 8x - 33 = 0
Click here to see answer by stanbon(57347)

Question 214152: 2 1/5 + 3 1/2 + 2 1/2x = 4 3/20
Click here to see answer by checkley77(12569)

Question 214778: complete the square
9x=3x eponent 2 -1

Click here to see answer by stanbon(57347)

Question 214855: I need an example of how to do this problem.
P=1000(sqrt)t + 3600
P =1000(sqrt)2 + 3600 is everything on this side squared and then square the "p"
P= 1000*1.41 + 3600 am I multiplying here?
p= 1410 + 3600
p= 5010
I don't believe this is correct. I thought I was supposed to square both sides but the radical is already on one side. I am confused. Am I leaving out a step or am I doing it wrong all together?
Click here to see answer by Alan3354(30993)

Question 214878: x^2+10x+1=0 what is x?
Click here to see answer by jim_thompson5910(28595)

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, 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