Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 80669: If f(x)=5x-1 , find the following
f(a-2)
f(a-2)=
Click here to see answer by rapaljer(4671)

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(4671)

Question 80631: if f(x)=5x-1
find (a-2)
Click here to see answer by tutor_paul(519)

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(22740)

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(75887)

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(22740)

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(6294)

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(75887)

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(22740)

Question 80766: can i get help with this equation please?
x^2-96=0
Click here to see answer by stanbon(75887)

Question 79279: Write the equation of the line passing through each of the given points with the indicated slope. Give you results in slope-intercept form, where possible.

(0,5),m=-3/5
Click here to see answer by vertciel(183)

Question 80780: I am having such a hard time please help me? the length of a rectangle is 5 cm more than 2 times its width. if the area of the rectangle is 68cm^2, find the dimensions of the rectangle to the nearest thousandth
Click here to see answer by vertciel(183)

Question 80771: how can i solve by using the quadratic formula?5x^2+x+7=0
Click here to see answer by vertciel(183)

Question 80703: The length of a rectangular scarf is 9 inches more than five times its width. The area of the scarf is 308 square inches. Determine the length and width of the scarf?
Click here to see answer by stanbon(75887)

Question 80785: How do you find the X Intercept?
Click here to see answer by checkley75(3666)

Question 80797: I have been trying to figure this out for two days. I really need help!!(This is Applications of Linear Equations)
An art dealer sold two artworks for $1520 thereby making a profit of 25% on the first and 10% profit on the other, whereas if he had approached any exhibition he would have sold them together for $1535 with a profit of 10% on the first and 25% on the other artwork. Find the actual cost of each artwork.
Click here to see answer by dolly(163)

Question 80798: can some one please help me i have to solve by using the quadratic formula
3x^2=11x+4
Click here to see answer by praseenakos@yahoo.com(507)

Question 80808: can some one check this for me please?
solve by using quadratic formula
5x^2+x+7=0
x=_+sqrt-2^2-5*5*7/2*5
(2)+sqrt(-4)5(7)/2(5)
2+16-49/2
2+sqrt33/2
Click here to see answer by stanbon(75887)

Question 80807: hello can some one check this for me please?
i have to find the x intercepts
y=x^2+2x-3
y=0
o=(x+4)(x-2)
x=-4
or
x=2
Click here to see answer by stanbon(75887)

Question 80807: hello can some one check this for me please?
i have to find the x intercepts
y=x^2+2x-3
y=0
o=(x+4)(x-2)
x=-4
or
x=2
Click here to see answer by Earlsdon(6294)

Question 80811: I'm stuck and need help! I have spent three long hours trying to figure out how they reduced a certain part of Quadratic Equation application problem. This is a part I must reduce before I can put the equation into Quadratic Formula Form. Once I get past this, the rest will not be a problem. Here is the part of the problem: X[(110/Xsquared)/600], and it reduces to: 121/6X. I can't firue out how it reduces to 121/6X. This part was derived from the formula where the cost of fuel for a van is C=Vsquared/600 where V is the speed in miles per hour. The driver is paid $5.00 per hour. Find the speed if the cost for wages and fuel for a 110-mile trip is $20.39. Can you help me?
Thanks,
Ed Smith

Click here to see answer by stanbon(75887)

Question 80817: please help! i need to identify the axis of symmetry and create a sutible table of values then graph the equation i can graph the equation i need help doing it.
y=x^2-4x
Click here to see answer by stanbon(75887)

Question 80824: can someone check this for me please!please check this for me
2x^2-6x+3=0
2^2+(-6)+3=0
1^2+(-3)+1.5=0
-3/4^2+x=1.5
x=1.5-(-3)/4^2=0.75
(-3/2)^2+(-0.75)=0
(13/2)=sqrt0.75
and
(-3/2)=-sqrt0.75
Click here to see answer by stanbon(75887)

Question 80827: can someone please check this for me?
(x-3)^2=9
=x=-3+-9
x=3+-sqrt9
Click here to see answer by Earlsdon(6294)

Question 80827: can someone please check this for me?
(x-3)^2=9
=x=-3+-9
x=3+-sqrt9
Click here to see answer by stanbon(75887)

Question 80815: can someone please help me i am no good with quadratics i have been practicing for a week and feel that i am wrong.
x^2=-5x+8
(x+3)(x+4)=0
x=-3
x^2=16
x^2=16=0
Click here to see answer by ankor@dixie-net.com(22740)

Question 80825: Can someone please check this for me?
solve by using the quadratic formula
x^2=5x+8
x^2=25+8
=-5+-sqrt33/2
Click here to see answer by stanbon(75887)

Question 80825: Can someone please check this for me?
solve by using the quadratic formula
x^2=5x+8
x^2=25+8
=-5+-sqrt33/2
Click here to see answer by Earlsdon(6294)

Question 80598: solve by using the quadratic formula?
x^2=-5x+8
Click here to see answer by checkley75(3666)

Question 80864: help needed!
problem 16 on page 298.
f(x)= ax^3 + bx^2 + cx + d (a different from 0)
Find conditions on a, b, and c to ensure that f is always increasing or always decreasing on (negative infinitif, positive infinitif).
1 solution
Please do not contact:allmaiga@hotmail.com because I gave that email by mistake.
tanks.
Click here to see answer by Edwin McCravy(20054)

Question 80883: factor the polynomial completely
121rSQUARED-64tSQUARED
Click here to see answer by sofiyacherni(99)

Question 80883: factor the polynomial completely
121rSQUARED-64tSQUARED
Click here to see answer by bucky(2189)

Question 80891: For the general cubic polynomial f(x)= ax^3 + bx^2 + cx + d (a different from 0).
Find conditions on a, b, c, and d to ensure that f is always increasing or always decreasing on (-00, +00).
Click here to see answer by stanbon(75887)

Question 80881: Factor
5xSQUARED-13x+6
could u show me how u got this please
Click here to see answer by stanbon(75887)

Question 80874: solve the equation
(3w+4)(2w-7)=0

Click here to see answer by bucky(2189)

Question 80876: factor the trinomial
nSQUARED-12n-45
Click here to see answer by jim_thompson5910(35256)

Question 80875: factor the trinomial
xSQUARED-10x+9
Click here to see answer by jim_thompson5910(35256)

Question 80866: Hi, Can anyone help with this word problem? The height h in feet of an object after t seconds is given by the function h = �16t2 + 20t + 5. How long will it take the object to hit the ground? Round your answer to the nearest thousandth.
Click here to see answer by jim_thompson5910(35256)

Question 80851: factor the quadratic expression completely, and find the roots of the expression.
1. 135x2 - 222x + 91
2. 6x2 - 42x + 72
Click here to see answer by jim_thompson5910(35256)

Question 80897: I'm confused by this problem: "Find the x-intercepts y = x^2 + 3x". Can anyone show me how to solve and find the x-intercepts on this type of equation? All of the examples in my text involve equations with constant terms (something like y = x^2 + 3x + 6). This one has me a bit confused. Thanks.
Click here to see answer by ankor@dixie-net.com(22740)

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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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, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240