Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 509152: What is the simplified version of 9 over ((x+1 over x-1)-1)
and the domain
Thanks
Click here to see answer by swincher4391(726)

Question 509154: What is the simplified version of 9 over ((x+1 over x-1)-1)
the last -1 is in the denominator
Thanks
Click here to see answer by swincher4391(726)

Question 509170: Solve by factoring:
2a^2-3a=-5
Guys I really need help quickly please help.

Click here to see answer by Alan3354(30968)

Question 509170: Solve by factoring:
2a^2-3a=-5
Guys I really need help quickly please help.

Click here to see answer by swincher4391(726)

Question 509175: 26.Solve.
15t^2 + 7t = 2

Solve:#14
Rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 hr. The speed of the river is 5 km/h. Find Abby’s speed in still water.

My math friends please help me with these I am on a deadline, thank you.I really am desperate here.
Click here to see answer by Alan3354(30968)

Question 509230: Solve the equation 4x^2 +12x=0
f(x) =4x^2+12x=0 where c is a constant
And part b
Given that f(x) =0 has equal roots find value of c and hence solve f(x) =0
Click here to see answer by solver91311(16868)

Question 509261: 1. In solving the equation (x – 1)(x – 2) = 30, Eric stated that the solution would be
x – 1 = 30 => x = 31
or
(x – 2) = 30 => x = 32
However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please help Eric to understand better; solve the problem yourself, and explain your reasoning.

MATH GENIUS I NEED HELP I AM LOST AND ON A DEADLINE!!
Click here to see answer by richard1234(5390)

Question 509273: 5. Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
4x + 8y = 16
-2x + 5y = 55

please help!
Click here to see answer by Alan3354(30968)

Question 509384: please someone help me to answer this problem, I have no idea how to do this question:4m^2+7m=0
i have no idea where to begin please help asap thanks
Click here to see answer by nerdybill(6948)

Question 509391: plese help me anwer this question i willput down the answer i originally recived but need to know if it is right or not if it is not please help me to get it right....x^2+11=6x
it has to be facotred i think or solved this is what i got so far
(x-3)^2+2=0
x^2-6x+11=0
-1/2(x-3)^2=1 is this right or not...i am not sure of it!
Click here to see answer by Alan3354(30968)

Question 509441: a rectangle has a perimeter of 400 feet... express its area in terms of one of its sides,x
Click here to see answer by richard1234(5390)

Question 510297: 11. Use polynomial long division to divide
-12x^3 – 8x^2 + 17x – 5
by
4x^2 – 4x + 1
MATH WORLD PLEASE HELP I AM ON A DEADLINE!!

Click here to see answer by rfer(12646)

Question 510301: ALMOST FINISHED PLEASE PLEASE HELP ME!
12. Multiply
-5x + 4
by
4x^2 + x
Click here to see answer by rfer(12646)

Question 510334: I need help in figuring out how to set this problem up and solving same:
Five divided by the sum of a number and 7, minus the quotient of 3 and the difference of the number and 7 is equal to 6 times the reciprocal of the difference of the number squared and 49. What is the number?
Thank You To Any and All ...
Click here to see answer by edjones(7569)

Question 510341: 7. Express in terms of i.
2√-36

Click here to see answer by swincher4391(726)

Question 510597: x2-19x+7=-7x-4
Click here to see answer by lwsshak3(6463)

Question 510663: 7(3X+6)=11-(X+2)
Click here to see answer by faceoff57(82)

Question 510959: Find b2 – 4ac and the number of real solutions for the given equation.
16-24+9x^2=0
Click here to see answer by stanbon(57224)

Question 511153: To determine the number
of ounces of fluid that a person should drink in a
day, divide his or her weight in pounds by 2 and then
add 0.4 ounce for every minute of exercise.
(a) Write a function that gives the fluid requirements
for a person weighing 150 pounds and exercising
x minutes a day.
(b) If a 150-pound runner needs 89 ounces of fluid
each day, determine the runner’s daily minutes of
exercise.

Click here to see answer by John10(245)

Question 511256: Solve the equation after making an appropriate substitution:
x^4-11x^2+28=0

Click here to see answer by Alan3354(30968)

Question 511416: I'm stuck on the below:
t = u + uqp ;solve for u
I divide both sides by qp but cant figure out what to do about the u + u...
Please assist
Click here to see answer by Alan3354(30968)

Question 511584: suppose the ball was 2.74 feet above ground when Josh hit it, and that it reached a maximum height of approximately 116.3 feet when it was approximately 215.3 feet away from where he hit the ball. The ball lands after traveling a ground distance of approximately 433.1 feet. find the other root?
Click here to see answer by stanbon(57224)

Question 511411: 1) Solve the following quadratic equation by factoring:
a) x2 − 6x −16 = 0

b) Solve the quadratic equation 6x2 + 3x – 18 = 0 using the quadratic formula.
Read the information in the assignment list to learn more about how to type math
symbols, such as the square root.

c) Compute the discriminant of the quadratic equation and then
write a brief sentence describing the number and type of solutions for the
Click here to see answer by richard1234(5390)

Question 511668: please help me.......
two school buildings are 7 inches apart on a city map. if the map scale is 4 inches to 3 miles, find the actual distance between the buildings.
Click here to see answer by bucky(2189)

Question 511746: the sum of two numbers is 16 and the product is 63. what is the two numbers?
Click here to see answer by Maths68(1474)

Question 512047: I am so confused about my MAT 117 Appendix F. Can someone help me, any help would be appreciated.
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 ? 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(57224)

Question 512143: State the value of the discriminant and then describe the nature of the solutions. 19x^2-5x+4=0
Click here to see answer by jim_thompson5910(28476)

Question 512298:

Click here to see answer by Edwin McCravy(8880)

Question 512295: I don't get how do we find the solution set for . Thank You very much :)
Click here to see answer by Edwin McCravy(8880)

Question 512355: How do you solve quadratic equations with a faster method, more pertaining to larger numbers?
Click here to see answer by stanbon(57224)

Question 512939: 〖(3x-5)〗^2=48
Click here to see answer by Alan3354(30968)

Question 513375: A quadratic function has zeros at x=2 and x=4 and a y-intercept at -16. What is the quadratic function in standard form?
I know I have to unfoil it, but I don't see how it is possible. If y=-16, wouldn't one of zeros have to be negative?
Click here to see answer by oberobic(2304)

Question 513463: I need help solving this problem.
Your company has determined that the profit equation (in thousands of dollars) of producing x thousand smartphones is as follows:
Profit = –x2 + 110x – 1,000
(If the number of smartphones is 40,000, for example, then x = 40). The break-even point is the number of smartphones sold and produced that would result in a profit of zero.
Use your preferred method for solving the quadratic equation to determine the break-even point. Clearly demonstrate how the answer is determined, and interpret the result in real-life terms.

Click here to see answer by stanbon(57224)

Question 513533: use the quadratic formula to solve the equation x2-4x+7=0?
Click here to see answer by jim_thompson5910(28476)

Question 513496: if y-mx-b=0, then:
solve for y in terms of m, x, and b.
and
find y when m=2/3, x=-12, b=-5
Click here to see answer by solovelyy<3(3)

Question 513643: Aki's Bicycle Design has determined that when x hundred bicyles are built, the average cost per bicycle is given by C(x)=0.2x^2-0.5x+8.256, where C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle?
Click here to see answer by stanbon(57224)

Question 513646: Divide 12 into two parts such that the sum of their squares is 74. We need to find the two numbers.
Click here to see answer by htmentor(788)

Question 514272: a mother is 60 years old and her child is 24 years old. when in the past was the product of their age 160?
Click here to see answer by stanbon(57224)

Question 514733: complete the square of y = ax 2+bx+c
Thank You:)
Click here to see answer by stanbon(57224)

Question 514776: 6y+19=95 what is the value of y
Click here to see answer by jim_thompson5910(28476)

Question 514802: a number divided by negative six is no less than 5
Click here to see answer by jim_thompson5910(28476)

Question 514817: this question i completel do not get and have not attempted any solution that makes sense. it asks: write the equation of the graph of y=x^2 after a shift left 2 and up 3?
Click here to see answer by oberobic(2304)

Question 515213: Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. The solutions are -6,3.
Click here to see answer by mananth(12270)

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