Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 329898: simplify and show work

Click here to see answer by Alan3354(31532)

Question 330044: #1, Hat sizes are determined by measuring the circumference of one's head in either inches or centimeters. Use ration and proportion to complete the following table.
Hat Size Head Circumference Head Circumference
(to nearest 1/5 inch) (to nearest centimeter)
7 1/2 23 3/5 60
7 3/8 _____ ______
#2, The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 30 mph can stop in 50 ft., how many feet will it take the same car to stop when it is traveling 20 mph?

Click here to see answer by stanbon(57967)

Question 330056: How can you find the solutions of a quadratic equation by looking at a graph. How do you find the vertex?
Click here to see answer by Fombitz(13828)

Question 330100: How many real-number solutions does 0 = x 2 - 7x + 1 have?
(A) None (B) One (C) Two (D) All real numbers
(E) It is impossible to determine.
Click here to see answer by mananth(12270)

Question 330123: Wrie a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. Solution 3, only solution. The solution is?
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Question 330143: I'm on college and math is not my subject. I have tried to work these problems, but I just can't get them. Please help me solve the Quadratic equation x2-2x-13=0 and 4x2-4x+3=0 Thanks so much.
Click here to see answer by privani(34)

Question 330163: s^2+s-42=0 solve for s
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Question 330166: (x+6)(x-15)(x+2)is greater than 0 what is the solution set?
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Question 330165: (-3t)^2(2t^8)^3=
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Question 330169: x^2+18x-4=0 solve for x
Click here to see answer by mananth(12270)

Question 330251: how do i get the answer to
1)X 2power - 2x - 13 =0
2) 4x 2power - 4x + 3 =0
3) x 2power + 12x - 64 = 0
4) 2x 2power - 3x - 5 = 0
please help me out

Click here to see answer by solver91311(17077)

Question 330251: how do i get the answer to
1)X 2power - 2x - 13 =0
2) 4x 2power - 4x + 3 =0
3) x 2power + 12x - 64 = 0
4) 2x 2power - 3x - 5 = 0
please help me out

Click here to see answer by Fombitz(13828)

Question 330255: I need help please. I need to solve this problem. (x+10)(x-3)(x+5)>0 Choose correct choice. A. The solution set is {x/what?} (need to fill in for x) or B. The solution is all real numbers. or C. There is no solution. Thank you.
Click here to see answer by solver91311(17077)

Question 330274: Model A takes 2 hours to assemble.
Model B takes 3 hours to assemble.
Model A costs $25 to make per bike.
Model B costs $30 to make per bike.
If your company has a total of 34 hours and $350 available per day for these two models, how many of each model can be made in a day?
• Solve the equations for the different bicycle models that can be made daily with the desired technique learned (graphing, substitution, elimination, and matrix).
• Explain how to check your solution for both equations.

Click here to see answer by Fombitz(13828)

Question 330278: Solve. 10x^4 -29x^2 +10=0. The solution is x=? Simplify and use radicals as needed. Rationalize all denominatiors. Use comma to seprarate answer.
Click here to see answer by Fombitz(13828)

Question 330307: how do i solve:
x^2-7x+3=0
Click here to see answer by jim_thompson5910(28715)

Question 330287: Jack usually mows his lawn in 4 hours. Marilyn can mow the same lawn in 7 hours. How much time would it take for them to mow the lawn together? It would take tham how many hours of they worked together?
Click here to see answer by scott8148(6628)

Question 330263: Use the FOIL method to find the product. (6x^2-4)(x^8-9).
Click here to see answer by ankor@dixie-net.com(15746)

Question 330408: use the discrimant to determine the kinds of numbers that will satisfy the equation x2=3x-4. do not solve.
Click here to see answer by mananth(12270)

Question 330417: begin with ax2+bx+c=0 and derive the quadractic formula by completing the square
Click here to see answer by jim_thompson5910(28715)

Question 330433: Please help with this problem. The book says find all real and imaginary solutions by method of choice.

2x - 5 = √7x+7
Click here to see answer by Earlsdon(6294)

Question 330422: Solve x2=-3x+7 using the quadractic formula?
Click here to see answer by solver91311(17077)

Question 330477: What is the sum of the solutions to the equation 9 x^2 - 6x = 8?
Click here to see answer by mananth(12270)

Question 330488: The length of a rectangle is 3 cm more than 2 times its width. If the area of the rectangle is 93 square centimeters, find the width of the rectangle to the nearest thousandth.
Thank you for the service you offer
Click here to see answer by mananth(12270)

Question 330489: Complete the table of values for the given quadratic equation:
Complete the table of given values for the function:
y = x2 + 3x.
Put the y values in the indicated blank.
x y
-3 blank 1
-2 blank 2
-1 blank 3
0 blank 4
1 blank 5

Click here to see answer by mananth(12270)

Question 330382: Complete the table of values for the given quadratic equation:
Complete the table of given
values for the function:
y = x2 + 3x.
Put the y values in the
indicated blank.
x y
-3 blank 1
-2 blank 2
-1 blank 3
0 blank 4
1 blank 5

Thanks again for the service You provide
Click here to see answer by Fombitz(13828)

Question 330517: 7/v=9/v-1/3 what is the solution for v
Click here to see answer by mananth(12270)

Question 330519: Jack can mow a lawn in 5hrs. Mary can more the same lawn in 4 hrs. How long will it take for them to mow the same lawn together.
Click here to see answer by mananth(12270)

Question 330516: If the sides of a sqaure are lengthened by 5cm. and the area becomes 81cm^2. What was the length of the original square?
Click here to see answer by mananth(12270)

Question 330528: Solve for x.
x^2 + 52 = 8x
Click here to see answer by Fombitz(13828)

Question 330528: Solve for x.
x^2 + 52 = 8x
Click here to see answer by mananth(12270)

Question 330509: Find the vertex,the line of symmetry, the maximum or minimum value of the quadratic function, and graph the function. f(x)=-2x^2+2x+8
Click here to see answer by Fombitz(13828)

Question 330626: 1. How many solutions exist for a quadratic equation? Explain and example
2. How do we determine whether the solutions are real or complex? Example.

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Question 330684: Look at the graph above and comment on the sign of the discriminant. Form the quadratic equation based on the information provided and find its solutions.
* This graph is a Parabola type. You can tell by its horse shoe shape and in a upright position
* The x2 coefficient term is positive, because of the upward opening. This tells me the formula ax^2 + bx + c = >0 is used. In addition, two real roots exist for a positive.
* Because the graph crosses the x axis, one or more real roots exist.
* A visible symmetrical (lowest point) exist and is called the vertex. This position is on coordinates (-0.16,-2). Additionally, the vertex is located between a mirror image of the left and right lines.

Click here to see answer by solver91311(17077)

Question 330706: how do i factor 9x^4+42 x^3+49x^2
Click here to see answer by scott8148(6628)

Question 330859: How many solutions does the following system of equations have?
y = x^2 - 4 and y = 3x^2 + 6x + 2

Click here to see answer by Fombitz(13828)

Question 330880: Solve the formula for the given letter. Assume all variables represent non-negative numbers.
a^2+r^2=j^2, for a
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Question 330878: Solve by completing the square.
x^2+3/2x=3
What is the solution?
x=___?
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Question 330864: w-7/w-9-w+1/w+9+w-45/w^2-81. sovle I'm thinking that the denominator for this one is (w-9)(w+9) stuck from there.
Click here to see answer by Alan3354(31532)

Question 330855: In solving the following system of equations, what is the value of the discriminant in the resulting equation? y = x2 - 2x + 1 and y = 1/4x^2 + 1/2
Click here to see answer by Alan3354(31532)

Question 330877: Give exact and approximate solutions to three decimal places.
x^2-5x+3=0
The exact solutions are x=__?
(use radicals as needed. Use commas to separate answers)
The approximate solutions to three decimal places are x=___?
(use a comma to separate answers)
Click here to see answer by Alan3354(31532)

Question 330925: (s+1/4)(s+1/5) Multiply for an answer
Click here to see answer by Fombitz(13828)

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