Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 1125481: x2+8x+1=0
Click here to see answer by ikleyn(52776)

Question 1125487: Y= -4.9x^2+25x
What is the value of x and y
Click here to see answer by josmiceli(19441)

Question 1125487: Y= -4.9x^2+25x
What is the value of x and y
Click here to see answer by ikleyn(52776)

Question 1125542: Mrs. Inere can sell 50 brownie boxes each month if she charges $95 for each box. She estimates that for every $5 increase in price, she will sell 2 boxes less. Find the price that would yield the maximum revenue.
Click here to see answer by Theo(13342)

Question 1125540: Two numbers have a difference of 10. What are the numbers if the product is a minimum?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1125541: A bus company carries about 20,000 riders for a fare of 90 cents. A survey indicates that if the fare is decreased by 5 cents, the number of riders will increase by 2,000. What price would result to the greatest revenue?
Click here to see answer by josmiceli(19441)

Question 1125638: H(t)=-4.9t^2+68.6t the function above gives the height of a model rocket,in meters,t seconds after it is launched from ground level.What is the maximum height,to the nearest meter,attained by the model?
Click here to see answer by josgarithmetic(39616)

Question 1125744: the equation of the path of a cricket ball thrown is y = x - x^2/50, where x m and y m are the horizontal and vertical heights, travelled respectively. Calculate the greatest vertical height reached and the horizontal distance travelled.
Click here to see answer by Alan3354(69443)

Question 1125823: Find the quadratic function that has given vertex and goes through the given point. (5,6), point (-1,0)
Click here to see answer by MathLover1(20849)

Question 1125823: Find the quadratic function that has given vertex and goes through the given point. (5,6), point (-1,0)
Click here to see answer by josgarithmetic(39616)

Question 1125823: Find the quadratic function that has given vertex and goes through the given point. (5,6), point (-1,0)
Click here to see answer by MathTherapy(10551)

Question 1126073: Hi,
I solved this question , but not getting the correct answer which is 16m. Kindly help.
Question--
The playing field at the local high school measures 140m by 50m. By increasing this rectangular area by the same amount on all sides, the new area will be exactly double the area of the field. By how much was each dimension increased, to the nearest metre?
Click here to see answer by greenestamps(13198)

Question 1126092: Need assistance please!
I am asked to Solve a quadratic equation and show check of the potential answer's. Additionally, any excluded values should also be identified.
a-4/a^2+5a -2/a+5=1/a^3+7a^2+10a
I worked through the problem and came up with a solution of a=-3.
Performing the check has me confused as I believe this is what will tell me if the values are excluded?
I did (-3+3)^2 which =0
I know 0 is an excluded value, but is the above the right approach or am I doing something wrong?
Thank you!
Click here to see answer by MathLover1(20849)

Question 1126226: Find the least value of the expression y= -x^2 - 6x +16 if x lies in the interval -11
Click here to see answer by rothauserc(4718)

Question 1126339: if 321n=232seven,find n

Click here to see answer by Alan3354(69443)

Question 1126407: find f(x) and g(x) such that h(x) = (fog)(x) h(x) = (3x^2-2x+1)^7
Click here to see answer by MathLover1(20849)

Question 1126420: A dog trainer has 108 ft of fencing that will be used to create a rectangular work area for dogs. If the trainer wants to enclose an area of 560 ft2, what will be the dimensions of the work area?
Click here to see answer by josgarithmetic(39616)

Question 1126427: parabolic bridge please solve
this is the equation:
Total length= 3770
Arches= 1650 feetx2=3300feet=6600 palms
Inches high= 5280
Steel work= 52800tonnes

Click here to see answer by greenestamps(13198)

Question 1126466: Consider the following system of equation: 3x-4y=0 and 4x-5y=k where k is a constant Real number. Solve the system for (x,y) in terms of k. Do not replace the constant k with a numerical value. Give your solution as an order pair in terms of k
Click here to see answer by josgarithmetic(39616)

Question 1126477: P(x)=-x^2+6x+7
a. find x and y intercepts
b. if this function represents the profit a company makes (in thousands of dollars), then find the maximum profit they can make selling x item.
Click here to see answer by josmiceli(19441)

Question 1126474: In the triangle where angle DHF=90, |EF|=9 cm, |HE|=x cm, |DE|=(x+3) and |DF|=2x cm. Obtain a quadratic equation in X.
Click here to see answer by ikleyn(52776)

Question 1126487: One number is three more than another number. The sum of their squares is 45. Find the numbers
Click here to see answer by Alan3354(69443)

Question 1126487: One number is three more than another number. The sum of their squares is 45. Find the numbers
Click here to see answer by josgarithmetic(39616)

Question 1126704: Use as a substitution to solve ++
Thanks
Click here to see answer by FrankM(1040)

Question 1126756: Ix x>0, y>0 and , find the exact value of .

Thanks.
Click here to see answer by josgarithmetic(39616)

Question 1126756: Ix x>0, y>0 and , find the exact value of .

Thanks.
Click here to see answer by ikleyn(52776)

Question 1126757: Find all the solutions of the equation
Click here to see answer by Alan3354(69443)

Question 1126759: Quartic equations of the form , (A does not equal 0), are reducible to quadratics using the substitution and grouping terms appropriately. Solve for x given .
Click here to see answer by greenestamps(13198)

Question 1126754: The equation has irrational roots. Find them by expressing the equation in the form .
Click here to see answer by greenestamps(13198)

Question 1127011: hello, I have this problem that I need to explained to my daughter. please help.
"A rocket is launched and follows a parabolic reaching a maximum height of 14 km when is is 8 km away from launch pad, which 250 m above the ground. Determine the height of rocket as a function of its horizontal distance from lunch pad."

thank you for your help
Click here to see answer by jim_thompson5910(35256)

Question 1127051: If the roots of the quadratic equation ax*2+bx+c=0 are in the ratio of 2 : 3,
then prove that 6b*2=25ac
Click here to see answer by greenestamps(13198)

Question 1127113: Find the zero�s of the function f(x)=4x^2=3x-3
Click here to see answer by josgarithmetic(39616)

Question 1127113: Find the zero�s of the function f(x)=4x^2=3x-3
Click here to see answer by Alan3354(69443)

Question 1127280: can the quadratic formula be used to calculate any type of real life situation regarding carbon 14
Click here to see answer by ikleyn(52776)

Question 1127304: Solve by completing the square: x^2+5x-50=0
Click here to see answer by math_helper(2461)

Question 1127312: Solve by completing the square.
(When I do this, I get a LOT of fractions. I feel like I'm missing something big in this problem.)
8x^2+10x=3
Click here to see answer by josgarithmetic(39616)

Question 1127353: A rectangular yard is to be fenced in with 80 m of fence. What must the dimensions of the yard be in order to maximize the area of the field?
Click here to see answer by addingup(3677)

Question 1127361: A truck with a height of 190 cm enters a tunnel with a parabolic ceiling. The width of the tunnel is 20 m and the maximum height of the tunnel is 10 m. At what minimal distance from the edge of the ground level can this truck pass through the tunnel?
Please anyone help me I've been stuck on this question for a while and I have a test coming up!!
Click here to see answer by solver91311(24713)

Question 1127352: A truck with a height of 190 cm enters a tunnel with a parabolic ceiling. The width of the tunnel is 20m and the maximum height of this tunnel is 10 m. At what minimal distance from the edge at ground level can this truck pass through the tunnel?
Click here to see answer by greenestamps(13198)

Question 1127363: Find the rule, in general form of a function with the unique zero -2 and passing through the point P(-1.3)
Click here to see answer by josgarithmetic(39616)

Question 1127363: Find the rule, in general form of a function with the unique zero -2 and passing through the point P(-1.3)
Click here to see answer by MathLover1(20849)

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, 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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, 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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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