Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 108279: Find the length of a simple interest loan with P=$640, r=8.5%, and I=$95.20.
Click here to see answer by stanbon(57282)

Question 108286: A store selects four item from a selection of 6 items to arrange in a display. How many different arrangements are possible?
Click here to see answer by stanbon(57282)

Question 108282: I need help with this question. I have puzzled my brain for too long.
How much should be invested at 8% compounded semiannually in order to have $5000 at the end of 8 years. Thanks,
Click here to see answer by scott8148(6628)

Question 108289: For a sample of size n-100, proportion p-0.6, and at a 95% confidence level, What is the upper bound of the proportion?
Click here to see answer by stanbon(57282)

Question 108288: A student applies for two different scholarships. The probability of receiving the first scholarship is 0.3 and the probability of receiving the second is 0.4. What is the probability of the student receiving one scholarship? The decisions are made independently.
Click here to see answer by stanbon(57282)

Question 108287: If the probability that at least one person makes an A on the final exam is 0.15, what is the probability no one makes an A?
Click here to see answer by stanbon(57282)

Question 108285: A group of people consists of 14 men and some women. One man and one woman can be selected in 252 ways. How many women are in the group?
Click here to see answer by wgunther(43)

Question 108277: f(x)=(x+2)(2x-3). f(-2)=__
Click here to see answer by HyperBrain(694)

Question 108234: Hi, I need some help on solving this problem. I need to solve the quadratic equation by extraction of roots:
(2x-3)^2=-25
Thanks!
Click here to see answer by HyperBrain(694)

Question 108320: Determine the number of real solutions of the quadric equation
Please help me solve the number or real soultions for this equation.
}
Thank you
Click here to see answer by stanbon(57282)

Question 108322: Please help me find all real soultions for this equation.
{{2y^2=15+y}}}
The teacher said there are two answers which are 3 and -5/2. I can not get to either of these answers.
Thank you
Click here to see answer by stanbon(57282)

Question 108283: The future value of an annuity is A=$32,000. Periodic payments are made quarterly for four years and the annuity earns 8% compounded quarterly. What are the periodic payments?
Click here to see answer by Fombitz(13828)

Question 108339: I have been trying to solve this word problem and could use someone's help(note that the chapter is on quadratic equations):
A garden area is 30 ft long and 20 ft wide. A path of uniform width
is set around the edge. If the remaining garden area is 400 ft2, what is the width of the path?
Click here to see answer by stanbon(57282)

Question 108368: Please help me solve this equation (X+5)^2=144
Click here to see answer by Fombitz(13828)

Question 108380: 4-7i/3i
Click here to see answer by Fombitz(13828)

Question 108379: completing the square
-1/2x²+4x-6=0
Click here to see answer by stanbon(57282)

Question 108379: completing the square
-1/2x²+4x-6=0
Click here to see answer by Fombitz(13828)

Question 108378: finding square root
1/4(x+1)²-16=0
Click here to see answer by Fombitz(13828)

Question 108392: 2y²+6=y²
Click here to see answer by checkley71(8403)

Question 108519: The question ask is to "solve by factoring" the problem listed below. The answer given is -1, -12.
x^2-13x=-12
x^2-13x+12 = -12+12
x^2-13x+12 = 0
I'm stuck past this point!

Click here to see answer by stanbon(57282)

Question 108522: Solve using the square root property:
(x+6)^2=4
Click here to see answer by Fombitz(13828)

Question 108495: please help me on my homework.
1.the sum of the numbers is 15. the sum of the squares of the numbers is 113. find the numbers.
2. one number is 6 larger than the other number. the square of the larger number is 132 greater than the square of the smaller number. what are the numbers?
3. 5 years hence, a boy's age will be 4 times the square of his age 9 years ago. how old is this boy?
4. the perimeter of a square is numerically 4 more than its area. find the length of its side.
5. the width of a rectangle is 9 cm shorter than its diagonal and 7 cm shorter than its length. how long is the diagonal?
Click here to see answer by ankor@dixie-net.com(15645)

Question 108554: Solve using quadratic formula
x^2-7x-1=-7
Thanks in advance!!
Click here to see answer by stanbon(57282)

Question 108575: Write the equation listed below in quadratic form and then solve it by factoring
9x(x-19)= -810
Click here to see answer by Fombitz(13828)

Question 108591: what is the sum of the roots of the quadratic equation: ax^2 + bx + c = 0, where a, b, and c are all non-zero real constants
Click here to see answer by Fombitz(13828)

Question 108595: The following matrix is obtained from the augmented matrix of a system of equations.

1 0 3 20
0 1 2 -2
0 0 1 4
What is the solution to the system is?

Click here to see answer by stanbon(57282)

Question 108593: The following augmented matrix represents the system of what equstions:
1/3/2/4
2/-1/5/-2
-3/1/6/1
Click here to see answer by checkley71(8403)

Question 108588: For the following probability distribution u=_____
xi 250/300/400
pi 0.30/0.50/0.20
Click here to see answer by stanbon(57282)

Question 108578: The height h (in feet) of an object that is dropped from the height of s feet is given by the formula h = s-16t^2, where t is the time the object has been falling. A 4 foot tall woman on a sidewalk looks directly overhead and sees a window washer drop a bottle from 6 story. How long does she have to get out of the way? Round to the nearest tenth. (A story is 12 feet.)

Click here to see answer by stanbon(57282)

Question 108567: Solve by using square root property
2x^2-35=15
Thanks!!
Click here to see answer by Fombitz(13828)

Question 108574: Solve using the quadratic formula:
x^2-7x-1=-7
Click here to see answer by checkley71(8403)

Question 108582: The hypotenuse of right triangle is 2.8 units long leg is 1.7 units longer than the shorter leg. Find the length of the sides of the triangle.
Click here to see answer by Fombitz(13828)

Question 108571: Solve each equation.
5y^2-25y=0
Click here to see answer by checkley71(8403)

Question 108576: How many ways can three prints be selected from a collection of 10 prints?
Click here to see answer by checkley71(8403)

Question 108572: What is the solution to the system of equations
x+3y=12
4x-y=-17
Click here to see answer by checkley71(8403)

Question 108569: What is the equation of the line through (8,6) and (2,-4)?
Thanks,
Click here to see answer by checkley71(8403)

Question 108551: Solve using square root property
2x^2-35=15
Thanks in advance!!
Click here to see answer by checkley71(8403)

Question 108630: The augmented matrix
1 3 2 4
2 -1 5 -2
-3 1 6 1
Represent the systems of equations.
Click here to see answer by checkley71(8403)

Question 108668: If the sqaure of a positive integer is added to three times the integer, the result is 28. Find the integer.
Need help setting up the problem and possible solving. Once it is set up, I am good with solving it. PLEASE help~
Click here to see answer by scott8148(6628)

Question 108667: The square of an integer is equal to twice the integer. Find the integer.
I am havin a hard time with these kinds of problems. Once I get the equation set up I can do it, but its just getting the inital problem on the paper to do so.... PLEASE help! Thanks
Click here to see answer by scott8148(6628)

Question 108660: I submitted this earlier not sure what happened to it. Sorry if it doubled.
A travel agency advertises all expenses paid trips to the grey cup game for special groups. Transportation is by bus which seats 48 passengers, and the charge per person is $80, plus an additional $2 for each empty seat.
a. if there are X empty seats, find the equations for
i) how many passengers are on the bus and
ii) how much does each pay?
b. What are the travel agency's total revenue when there are X empty seats?
c. Find the maximum receipts.
Could anyone help please? thank you
Click here to see answer by scott8148(6628)

Question 108756: Solve using the quadratic formula:
x^2 - 3x = 7x - 2
Click here to see answer by Fombitz(13828)

Question 108813: I was just needing help with this problem. 2(x-5)^2=3 I am suppose to solve for x.
Click here to see answer by Earlsdon(6287)

Question 108812: 2x^2-5x=3 I am having trouble figuring this out.I am suppose to use the quadratic formula
Click here to see answer by jim_thompson5910(28536)

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