Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 138541: x + 11 < - 2 or x + 11 > 4
The solution is xlx??
Can someone please help with this i do not understand these at all.
Click here to see answer by vleith(2983)

Question 138535: The body mass index, I, can be used to determine an individual's risk for heart disease. An index less than 25 indicates a low risk. The body mass index is given by the formula, or model,I= 700 W/H2(little 2 over the H) , where W=weight, in pounds, and H=height, in inches. Francis weighs 176pounds and stands 68 inches tall. What is his approximate body mass index? Find an inequality describing all weights W that Francis can have and be in the low-risk category.
Francis approximate body mass index is??
Can someone help me with this??
Click here to see answer by vleith(2983)

Question 138554: Please help solve for vertex, axis of symmetry, y-intercept.
(y=1/2x^2+4X+3)
Click here to see answer by stanbon(75887)

Question 138539: Solve: -10 <_ 3x-9 <_ -2 (the _ are supposed to be under the <)
{x | ?? <_ x <_ ??} (again the _ is supposedto be under the <)
Can someone hlp me with this. Do i add 2 to each equation first??
Click here to see answer by stanbon(75887)

Question 138574: Graph the system of inequalities.
y >_ -2
x >_ 5 Of coure the _ is supposed to be under the >
Can you help with this please. I am baffled.
Click here to see answer by solver91311(24713)

Question 138589: The price of a barrel of crude oil in 1998 was $25. By 2004, the price had increased to $54 per barrel. Assuming oil prices exhibit exponential growth, what year will the price of oil be $123 per barrel?
Click here to see answer by checkley77(12844)

Question 138588: Solve: (logbase16 x)(logbase16 x)=1/4
Click here to see answer by stanbon(75887)

Question 138595: 1.Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city.
a)The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use x to represent floor plan #1 and y to represent floor plan #2. Write an equation that illustrates the situation.
Would this be x= 1, y= 2 ? Is this right or should the number 56 be divided by x and y also? HELP
Click here to see answer by stanbon(75887)

Question 138601: 2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it.
(HELP can you please help)
a) The sales representative here tells you they also have two floor plans available, but they only have 38 homes available. Write an equation that illustrates the situation. Use x and y to denote floor plan #1 and floor plan #2 respectively. x = 19, y = 19, is this correct?
b) The representative tells you that floor plan #1 sells for $175,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $7,200,000. Write an equation that illustrates this situation. Use the same variables you used in part a. x=$175,000, y = $200,000 is this correct????

Click here to see answer by stanbon(75887)

Question 138583: The approximate distance above sea level,d, in kilometres, is given by the formula d= (400(log(P/2)-2.5))/30, where P is the barametric pressure in kilopascals(kPa). What is the barometric pressure 12 kilometres above sea level? PLEASE HELP ME :)
Click here to see answer by ankor@dixie-net.com(22740)

Question 138591: The midpoint of AB is (3sqrt5,2sqrt3). If the coordinates of the endpoint B are (-sqrt5,1/2sqrt3), then what are the coordinates of endpoint A?
Click here to see answer by stanbon(75887)

Question 138585: Solve for x: logbasex(3x+10)=logbase7 49
Click here to see answer by edjones(8007)

Question 138581: Solve: (x/x+2)- (4/x-4)=(1/2)
Click here to see answer by edjones(8007)

Question 138562: 0.7x + 1 <_ 1.5x - 6 (I cannot get the_to go under the < like it should be)
Can someone help me with this one please.
Click here to see answer by edjones(8007)

Question 138562: 0.7x + 1 <_ 1.5x - 6 (I cannot get the_to go under the < like it should be)
Can someone help me with this one please.
Click here to see answer by MathHelperer(1)

Question 138571: Graph the inequality on a plane.
y > 4x
HELP please. Not sure how to do this this is new to me.
Click here to see answer by vleith(2983)

Question 138681: I have been working on this problem for the pass two days and all I have is a bunch of mumbule jumbule. Can some work the problen in a way that I can understand it please:)
-----------------------------------------------------

Marriage penalty eliminated. The value of the expression
3910 + 0.25(x-28,400)
is the 2003 federal income tax for a single taxpayer with
taxable income of x dollars, where x is over $28,400 but
not over $68,800.
a) Simplify the expression.
b) Find the amount of tax for a single taxpayer with
taxable income of $40,000.
c) Who pays more, a married couple with a joint taxable
income of $80,000 or two single taxpayers with
taxable incomes of $40,000 each?
Click here to see answer by stanbon(75887)

Question 138740: Solve by using the quadratic formula. I can not reach the correct answer for:
3x2-10x-21=0
I did: -(-10)+-(-10)2 -4(3)(-21) divided by 2(3) =
10=-100+252 divided by 6
10+-352 divided by 6
10+-18.8 divided by 6
correct answer: 5+-2(rad)22 over 3. Please show me what I am doing wrong. Thank you for your attention.
Kathy
Click here to see answer by stanbon(75887)

Question 138818: What is the y-intercept of -1/6(y+3)=(1/2)^x-3???? I think the answer is (0,-51) BUT I am not sure :(
Click here to see answer by Edwin McCravy(20054)

Question 138748: I did try to work these out but not sure if i am right...please take a look for me...thanks
You recently started the paperwork to purchase your new home, and you were just notified that you can move into the house in 2 weeks. You decide to hire a moving company, but are unsure which company to choose. You search online and are interested in contacting two companies, Heavy Lifters and Quick Move, to discuss their rates. Heavy Lifting charges an $80 fee plus $35 per hour. Quick Move charges $55 per hour with no additional fees.
a) Which mover provides a better deal for 2 hours of work? How did you arrive at your answer? For this it would be $110 for the Quick move, and $150 for Heavy Lifting. So Quick move would be cheaper correct?
b) Which mover provides a better deal for 15 hours of work? How did you arrive at your answer? If you didnt get charged for a heavy lifting charge heavy lifting would be better, but if you got the lifting charge it would be better to go with the other one. So how do I no??? It doesnt say.
c) For what values h (hours) does Quick Move offer the better deal? Express your answer as an inequality. Explain how you reached your answer.
THIS ONE??? b = 55, a = 115
Can someone Help me with this word problem I hate these things, I never understand exactly what I am supposed to do... DId I get any of these right??

Click here to see answer by scott8148(6628)

Question 138838: I hope someone can help me with this problem. I keep getting different answers.
The endpoints of segment FG have coordinates F(1/2a,-b)and G(a,1/4b). What is the expression for the length of the segment? I got 1/4sqrt4a^2-25b^2 or 1/4sqrt4a^2+9b^2 or 1/4sqrt4a^2+25b^2 or 1/4sqrt12a^2-17b^2 :( PLEASE HELP ME.
Click here to see answer by stanbon(75887)

Question 138886: -2x < x + 1 < 7
the solution is {xlx?? Can someone explain this to me again.
Click here to see answer by edjones(8007)

Question 138910: Describe what the graph of interval [-4,10] looks like.
HELP PLEASE. How do i explain this???

Click here to see answer by nabla(475)

Question 138917: heres the question: FInd a quadration function that fits the set of data points (0,-9),(-2,-13),(3,27) please help I have no idea how to do this.
Click here to see answer by ankor@dixie-net.com(22740)

Question 138938: Please show me how to solve the quadratic equation, I need to get the vertex, axis of sym., and y-intercept to graph.
2y=X^2+4X+5

Click here to see answer by stanbon(75887)

Question 138885: Solve.
0.5x + 6 <_ 1.3x - 3
HELP PLEASE!! WIll someone help.
Click here to see answer by ankor@dixie-net.com(22740)

Question 138911: This question is a word problem using the quadratic formula A rectangular poool has dimensions of 40 ft and 60 ft. If the pool has a patio area around it that equals the area of the pool, how wide is the distance from the pool edge to the patio edge.
Click here to see answer by ankor@dixie-net.com(22740)

Question 139028: I was absent from school the day my class went over this and need help. The question is:
Find the equation of the axis of symmetry and the coordinates of the vertex of the graph of each function.
Problem 1:
.
Click here to see answer by solver91311(24713)

Question 139043: x(x-32)=0
Click here to see answer by oscargut(2103)

Question 139109: Solve the system of equations by graphing. Then classify the system as consistant or inconsistant and the equation as dependent or independent.
x + y = 7
x - y = -5
What is the solution of the equations?
Can someone please explain to me how to do this?? I am so stumped with this problem.
Click here to see answer by checkley77(12844)

Question 139115: Lee can frame a cabin in 4 days less than ron When they work together they will do the job in 4 4/5 days how l ong would each of them take to frame the cabin alone.
Click here to see answer by checkley77(12844)

Question 139114: Three girls laura, Tammy, and jeri can wash the family cars clean the pool and mow the lawn in one hour and 20 minutes if jeri did all the work she would take twice as long as Tammy and 2 hours longer than laura how long would each girl take to the the jobs alone.
Click here to see answer by stanbon(75887)

Question 139128: Calculate the value of the discriminant of x^2+2x+1=0
Click here to see answer by edjones(8007)

Question 139101: This is another word problem question. One leg of a right triangle is 96 inches. Find the hypothesis and the other leg if the length of the hypotenuse exceeds 2 1/2 times the other leg by 4 inches.
>>>i tried working it out and got 2 1/2 times leg + 4 eguals hypotenuse
and 2 1/2 divided leg - 4 eguals leg.
Click here to see answer by edjones(8007)

Question 139129: How many and what type of solutions will the equation have? 4a^2 + 4a + 2 = 0, can you graph this equation? what might it look like? I have the final answer as -1/2 + 1/2i, -1/2 - 1/2i, i don't know if this is correct?
Click here to see answer by stanbon(75887)

Question 139130: Do these equations have a maximum or a minimum? What is the maximum or minimum point? g(x) = -x^2 + 4x + 5 and f(x) = 2(x+3)^2 - 4....i can't really show what i have tried because i don't know how to figure this out, sorry!! please help?!
Click here to see answer by stanbon(75887)

Question 139155: Please help me translate the following into a quadratic equation and solve it. Thanks!
The length of a rectangle garden is three times it width; if the area of the garden is 75 square meters; what are its dimensions?
Click here to see answer by scott8148(6628)

Question 139153: What three techniques can be used to solve a quadratic equation? Please could you demonstrate all three techniques using the following equation. Thanks!
12x^2 - 10x - 42 = 0
Click here to see answer by checkley77(12844)

Question 139162: Please help! Given the Vertex, Axis of Sym., and y-intercept what is the equation? Thanks!
vertex (4,11)
A of S = x=4
y-intercept (0,3)

Click here to see answer by scott8148(6628)

Question 139161: Please help! Given the Vertex, Axis of Sym., and y-intercept what is the equation? Thanks!
vertex (4,11)
A of S = x=4
y-intercept (0,3)

Click here to see answer by scott8148(6628)

Question 139141: In a right triangle, find the lenghth of the side not given.
b=2 c=sqrt 29 a=?

Click here to see answer by checkley77(12844)

Question 139188: I have tried this problem and I have the answer but im not getting the answer... I get another one. the problem is 25x2-20x=-3 I changed the problem to read 25x2-20x+3=0 then used the quadratic formula of X=-b+-the square root of b-4ac over 2a I came up with X=2+-1/5 the answer is supposed to be 1/5 and 3/5
Click here to see answer by solver91311(24713)

Question 139177: Please help me translate this into a quadratic equation and solve.
A designer attempts to arrange the characters of his artwork in the form of a square grid with equal numbers of rows and columns, but finds that 24 characters are left out. When he tries to add one more row and column, he finds that he has 25 too few characters. Find the number of characters used by the designer.

Click here to see answer by ankor@dixie-net.com(22740)

Question 139174: Please help me translate into a quadratic equation and solve.
Steve traveled 200 miles at a certain speed. Had he gone 10 MPH faster, the trip would have taken 1 hour less. Find the speed of his vehicle.
Click here to see answer by ankor@dixie-net.com(22740)

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, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 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, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240