Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 80228: Solve each of the equations for x
25x^2=13
thanks
Click here to see answer by checkley75(3666)

Question 80195: what are the steps to do a quadratic equation
Click here to see answer by checkley75(3666)

Question 80319: Solve by factoring
4x^2 - 12x + 9 = 0
I came up with -3/2 or 3/2 but it does not work. Thank you for your help
Click here to see answer by sofiyacherni(99)

Question 80328: Hello, I am trying to solve this problem and need help.
Directions are to solve, apparently there will be 6 answers.

Thank you!!!
Click here to see answer by checkley75(3666)

Question 80328: Hello, I am trying to solve this problem and need help.
Directions are to solve, apparently there will be 6 answers.

Thank you!!!
Click here to see answer by mathtutor777(6)

Question 80324: HELP ASAP!!!! An object is propelled vertically upward from the top of a 112-foot building. The quadratic function s(t) = -16t^2 + 176t + 112 models the ball’s height above the ground, s(t) in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary.
Click here to see answer by ankor@dixie-net.com(15649)

Question 80352: The length of a rectangle is four less than three times the width. The area is 20 square centimeters. Find the dimensions of the rectangle.
Click here to see answer by checkley75(3666)

Question 80349: The sum of two numbers is -15. Their product is -100. Find the two numbers.
Click here to see answer by checkley75(3666)

Question 80348: The sum of two numbers is 12. Their product is 36. Find the two numbers.
Click here to see answer by stanbon(57307)

Question 80242: Construction. 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 ft^2, what is the width of the path?
thank you
Click here to see answer by ankor@dixie-net.com(15649)

Question 80350: The length of a rectangle is four times the width. The perimeter is 150 inches. Find the dimensions of the rectangle.
Click here to see answer by tutor_paul(490)

Question 80427: Can someone help me please?
The average number of diners in a restaurant can be modeled with the function
D(t)= -2t^2+20t+15 , where t is the number of hours after 8:00 A.M. At what time is the number of diners at its maximum?
thanks so much!
Click here to see answer by stanbon(57307)

Question 80444: 5(x)+6=34
Click here to see answer by tutorcecilia(2152)

Question 80472: I am havin such a hard time please help me? The length of one leg of a right triangle is 3 in. more than the other. If the length of the hypotenuse is 8 in., what are the lengths of the two legs?

Click here to see answer by ankor@dixie-net.com(15649)

Question 80484: I hope you can help with this word problem. I don't know where to begin and I cannot find an example in the book to go by. Thank you
Problem
Time to swing
The speed T (time in seconds for one complete cycle) of a pendulum is related to the length L(in feet) of the pendulum by the formula 8T^2 = pi^2L. If a child is on a swing with a 10-foot chain, then how long does it take to complete one cycle of the swing.
Hope someone can help please.
Click here to see answer by checkley75(3666)

Question 80491: if f(x)=4x-3 find f(-1)
Click here to see answer by tutor_paul(490)

Question 80487: you have at least $30 in change in your drawer, consisting of dimes and quarters. write and inequality that shows the different number of coins in yur drawer. Can some one please help me with this?
Click here to see answer by checkley75(3666)

Question 80489: rewrite this equation as a function of x
-3x+4y=11
Click here to see answer by checkley75(3666)

Question 80501: help me someone please!!
The length of a rectangle is 1 cm longer than its width. If the diagonal
of the rectangle is 4 cm, what are the dimensions (the length and the width) of the rectangle?
Click here to see answer by checkley75(3666)

Question 80511: Directions: decide whether the graph of the equation opens up or down. Then find the coordinates of the vertex.as in ... y=3x^2 and/or y=2x^2-4x+3
Click here to see answer by stanbon(57307)

Question 80505: a rock 80m up the face of a cliff breaks loose. about how long does it take for the rock to fall to the ground?
Click here to see answer by Edwin McCravy(8908)

Question 80490: graph the function
f(x)=-2x-5
Click here to see answer by tutorcecilia(2152)

Question 80616: The height h in feet of an object after t seconds is given by the function
h=-16t^2+90t+4
how long will it take the object to hit the grown? Round to the nearest thousandth
Click here to see answer by stanbon(57307)

Question 80634: I'm having trouble solving this word problem. The product of 2 positive integers is 30. Find the integers if the larger is 4 less than twice the smaller. We need to represent the variable(s), write the equation, and solve the equation. I believe the 2 positive integers are 5 and 6, but i don't know how to write the equation to be able to solve it. Thank you,
Jennie
Click here to see answer by ankor@dixie-net.com(15649)

Question 80633: We are solving quadratic equation. I tried to sole this problem, but I'm having some trouble. Please help me solve this quadratic equation: . Any help will be appreciated. Thank you,
Jennie

Click here to see answer by ankor@dixie-net.com(15649)

Question 80630: (x)=xsquared-7x+10
find f (0)
find f (5)
find f (-2)
Click here to see answer by praseenakos@yahoo.com(507)

Question 80670: If f(x)=5x-1 , find the following
f(a-2)
f(a-2)=
Click here to see answer by praseenakos@yahoo.com(507)

Question 80675: The boundary line for the linear inequality has been graphed. Determine the correct half-plane and complete the graph.
y is greater than 3
Click here to see answer by stanbon(57307)

Question 80666: Graph the function

f(x)- -2x-5
Hint: This is just like the equation y = mx + b

Click here to see answer by praseenakos@yahoo.com(507)

Question 80669: If f(x)=5x-1 , find the following
f(a-2)
f(a-2)=
Click here to see answer by rapaljer(4667)

Question 80667: Graph the function

f(x)= -2x-5
Hint: This is just like the equation y = mx + b

Click here to see answer by rapaljer(4667)

Question 80631: if f(x)=5x-1
find (a-2)
Click here to see answer by tutor_paul(490)

Question 80678: Graph the following inequality.
3x-4y is less than 12
Click here to see answer by sprolden(40)

Question 80652: 2. A professor started a project with a group of students, 60% of whom were boys. Due to some unavoidable reasons, six girls couldn't turn up, so the professor had to make some changes in the group. He admitted six boys. In doing so, the percentage of boys in the project increased to 75%. Find the number of boys and girls involved in the project initially.
Click here to see answer by ankor@dixie-net.com(15649)

Question 80698: Can you please help me solve this equation i have been trying for the past 7 hours and it just dosent make any sense:
A rectangle is initially 6cm wide and 12cm long. If a strip of uniform width is added to the outside of each of the four sides, the resulting area is 160 square cm. Determine the width of the strip?
Click here to see answer by stanbon(57307)

Question 80653: 3. Steve traveled 600 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle.
y=time
xy=600
(x+20)(y-1)=600
Now what do I do?
Click here to see answer by ankor@dixie-net.com(15649)

Question 80707: can some one please help me solve this?
x^2+7=23
Click here to see answer by nidhi_mundra_5(2)

Question 80709: can you help me by solving completing the square?
x^2-2x-35=0

Click here to see answer by dolly(163)

Question 80708: I thank you guys for helping me so much. Up into now i have been doing pretty well now that i am doing quadratic i need severe help i am in my last two weeks of class and now i am scarred please can you help me with this?
1. (x+5)^2=7
2. (x-3)^2=9
3. x^2-96=0
Click here to see answer by Earlsdon(6287)

Question 80704: A basketball player takes a shot a a regulation basket, 10 feet off the floor. He releases the ball with an initial upward velocity of 19 feet per second from a height of 7 feet off the floor. How long does it take for the ball to pass through the basket? The vertical motion model is: h=-16T^2+vT+s, where h is the height infeet as a function of time, T is the time in motion in seconds, v is the initial velocity in feet per second, and s is the height in feet.
Click here to see answer by stanbon(57307)

Question 80650: 4. Rita rows 12 km upstream and 12 km downstream in 3 hours. The speed of her boat in still water is 9 km/hr. Find the speed of the stream
Click here to see answer by ankor@dixie-net.com(15649)

Question 80766: can i get help with this equation please?
x^2-96=0
Click here to see answer by stanbon(57307)

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