Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 172941: Find the x-intercepts
y = x^2 + 4x - 1
Click here to see answer by jojo14344(1512)

Question 172956: I have been trying this problem and I am stuck and need help! my final is monday.
One positive integer is 7 less than twice another. The sum of their squares is 202. What are the integers? Define a variable. Set up a quadratic equation. Solve, show all your work.
If you could show me all the work too that would be great so I can know how to do it next time.
Thank you
Click here to see answer by Alan3354(30993)

Question 172939: The current in a stream moves at a speed of 3 mph. A boat travels 45 mi upstream and 45 mi downstream in a total time of 8 hr. What is the speed of the boat in still water?
Click here to see answer by nerdybill(6951)

Question 173026: find the line of symmetry
y=3x^2-8x-5
Click here to see answer by stanbon(57282)

Question 173026: find the line of symmetry
y=3x^2-8x-5
Click here to see answer by checkley77(12569)

Question 173023: graph y=(x-2)^2+1
Click here to see answer by checkley77(12569)

Question 173033: Hi, we just started learning about quadratic equations today, and I found some problems that I needed help with.
Define a variable and write a quadratic function to describe each situation.
30. the product of two numbers whose sum is 45
31. the area of a circle in terms of its radius
32. the product of two numbers whose difference is 15
any help would be appreciated, thank you!
Click here to see answer by Alan3354(30993)

Question 173065: If you could solve this for me...

Thank you!
Click here to see answer by stanbon(57282)

Question 173108: how do i convert this into a form i can solve as a quadratic equation?
9(p-300)^2= 1.02^2 *p(400-p)
Click here to see answer by Alan3354(30993)

Question 173122: Please help me with the following problem.
4/m^2-7 = 1
Click here to see answer by jim_thompson5910(28536)

Question 173128: Can I please get some help with this problem?
Solve for t h= 16t^2 + vt + s
Click here to see answer by stanbon(57282)

Question 173145: I'm not sure I understand what they are asking us to do for this problem. Evaluate the discriminant b^2 - 4ac. Then use the answer to state how many real-number solutions exist for the equation.
y = x^2 + 8x + 16
Click here to see answer by Alan3354(30993)

Question 173144: I need help with this problem of finding the x intercepts.
y = x^2 + 4x -1
Click here to see answer by Alan3354(30993)

Question 173144: I need help with this problem of finding the x intercepts.
y = x^2 + 4x -1
Click here to see answer by stanbon(57282)

Question 173140: Help! My final is on Monday and I can't figure out this word problem. Please write it out step by step so I will be able to do it on the final. Thank you.
The height of a triangle is 8 centimeters greter than the base. The area of the triangle is 90 square centimeters. Find the length of the base and height of the triangle. Define a variable. Set up a quadratic equation. Solve. Show all work.
I'm really stuck, I thought I knew it but I've been at it most of the day.
Click here to see answer by jim_thompson5910(28536)

Question 173166: ms.noemi jogged at a total distance mof 6600 yards in threee nights.If each night she incr5eased her distance to 440 yards,how far did she jog on the first night.
Click here to see answer by stanbon(57282)

Question 173165: how many gallons of water that is 74% of alcohol must be mixed with gallons of one that is 90% alcohol in order to obtain a mixture that is 84% alcohol?
Click here to see answer by stanbon(57282)

Question 173164: a fanner has three fields of equal size and pays each of his workmen 60 pesos per day.He paid a total of 450 pesos to the workmen after each,working alone,plowed on the field.these workmen together,plowed the third field in 1 13/15 days.how many days did it take each man to plow a field alone?
Click here to see answer by stanbon(57282)

Question 173214: What is the standard form of the quadratic function y=(x-4)²-11
Click here to see answer by Mathtut(3670)

Question 173223: Use the quadratic formula to solve 2x²+11x-4
Click here to see answer by sofiyacherni(99)

Question 173222: Use completing the square to solve x²+8x-11=0
Click here to see answer by jim_thompson5910(28536)

Question 173216: What are all the solutions of 4x²+3x-8=3x²+2
Click here to see answer by jim_thompson5910(28536)

Question 171822: True or false: The function "f(x) = 3x" grows three times faster than the function "g(x) = x". Explain
Click here to see answer by Alan3354(30993)

Question 173297: The distance an object falls is directly proportional to the square of the time it has been falling. After 6 seconds it has fallen 1296 feet. How long will it take to fall 2304?
Click here to see answer by Alan3354(30993)

Question 173310: How would I solve for (x+8)^2 -7= -12
since you can't have the square root of a negetive number?
Click here to see answer by jim_thompson5910(28536)

Question 173323: Is this trinomial a perfect square?
x² - 6x - 9
Please show work as to how it is or isn't. I asked this question last week but work wasn't shown. I need it explained to me so I can understand. PLEASE HELP!!
Click here to see answer by solver91311(16872)

Question 173348: I have a word problem but I am stuck.
the current in a stream moves at a speed of 3mph. A boat travels 45 mi upstream and 45 mi downstream in a total time of 8 hours. What is the speed of the boat in still water?
45/r-3 + 45/r+3 = 8
45(r+3) + 45(r-3)= 8(r+3)(r-3)
90r = 8r^2 - 72
and I'm stuck
Click here to see answer by jim_thompson5910(28536)

Question 173354: this algebra stuff is so confusing to me. I have a word problem that I don't know how to set up and solve.
The length of a rectangle is approximately 1.6 times the width. Find the dimensions of the rectangle is its are is 9000m^2
Click here to see answer by jim_thompson5910(28536)

Question 173359: Find the axis of symmetry.
y = x² - x + 5
Click here to see answer by jim_thompson5910(28536)

Question 173359: Find the axis of symmetry.
y = x² - x + 5
Click here to see answer by stanbon(57282)

Question 173360: This is about graphing quadratic equations and finding the ordered pairs for the vertex and the y-intercept. If anyone can explain this to me it would sure help.
y = x^2 + x - 2
Click here to see answer by jim_thompson5910(28536)

Question 173400: The equation has roots and , and the equation has roots and . find the value of and of .
Click here to see answer by Edwin McCravy(8893)

Question 173417: Solve for the specified variable
S = a/1 - r for r
Click here to see answer by stanbon(57282)

Question 173416: Solve. Round results to the nearest thousandth.
7x^2 - 6x - .4255 = 0
Click here to see answer by stanbon(57282)

Question 173415: Try factoring first. If factoring is not possible or is difficult, use the quadratic formula.
2x^2 + 8x = -1
Click here to see answer by stanbon(57282)

Question 173414: Round to the nearest tenth, if necessary. A rock falls from a tower that is 432 feet high. As it is falling, its height is given by the formula h = 432 - 16t^2. How many seconds will it take for the rock to hit the ground (h=0)?
Click here to see answer by stanbon(57282)

Question 173413: Solve the equation by completing the square
p2 + 3p - 9 = 0
Click here to see answer by nerdybill(6951)

Question 173413: Solve the equation by completing the square
p2 + 3p - 9 = 0
Click here to see answer by KnightOwlTutor(293)

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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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, 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