Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 865253: Multiply
(x-3) (x+4)
Click here to see answer by rfer(16322)

Question 865566: How many 4 cm by 4cm tiles are needed to cover an area which measures 20cm by 28cm
Click here to see answer by ewatrrr(24785)

Question 865572: A piece of wire 536cm long is cut into 2 parts such that the longer part is 3 times as long as the shorter Part what are the lengths in cm of 2 parts
Click here to see answer by ewatrrr(24785)

Question 865629: One of the roots of the equation y= -2x^2+kx+(k+2) is located at x=3
A) determine the value of k
B) determine the other root of this equation
Click here to see answer by htmentor(1343)

Question 865655: What is the quadratic formula? What is it used for? Provide a useful example
Click here to see answer by richard1234(7193)

Question 865725: A rectangle has a length of x and a width of 2x+3. It has an area of 200 cm^2.
a) Writ ean equation using the dimensions and the area
b) Graph the related funtion using a graphing calculator
c) find the demensions of the rectangle
Ok, so I know how to Graph it and find the dementions.... When I have an equation. We've been using ax^2*bx+c and I honestly could not figure out how to turn it into a enterable equation. Help with finding the answer to "a" please?
Click here to see answer by Alan3354(69443)

Question 865801: 6xsq.(2x+3)-5x(2x+3)=4(2x+3)
Click here to see answer by mananth(16946)

Question 865830: Hello Tutors! Im working on my chapter review (quadratic functions and equations) and this question stopped my momentum totally. Any help is greatly appeciated. Working together, Dani and Cheri can reply to a days worht of customer service e mails in 4 hours. Working alone, Dani takes 6 hours longer than Cheri. How long would it take Cheri alone to reply to these emails?
Im interested in how to set this up, thanks again, may the force be with you!
Click here to see answer by josgarithmetic(39617)

Question 866019: f(x)=x2+6x+10
Click here to see answer by ewatrrr(24785)

Question 866044: Jack is building a rectangular dog pen that he wishes to enclose.the width of the pen is 2 yards less than the length.if the area of the pen is 15 square yards,how many yards of fencing would he need to completely enclose the fence?

Click here to see answer by josgarithmetic(39617)

Question 866079: solve this problem.....
f(x)=2x^2+24x using the quadratic formula
Click here to see answer by richwmiller(17219)

Question 865657: Quadratic equations, which are expressed in the form of ax� + bx + c = 0, where a does not equal 0, may have how many solutions? Explain why.
Click here to see answer by richwmiller(17219)

Question 866114: the vertex of a parabola is it (-4,-3). If one x-intercept is -11, what is the other x-intercept
Click here to see answer by Edwin McCravy(20054)

Question 866131: In an unknown fraction the denominator is one more than twice the numerator.When 2 (1/10) is added to this fraction,the result is equal to the reciprocal of the unknown fraction.find the unkown fraction.
Click here to see answer by ankor@dixie-net.com(22740)

Question 866137: The area of the front cover of a daily journal is 273 cm^2 and the length is 8 cm greater than the width. What are the dimensions of the cover?
Click here to see answer by farbonara(13)

Question 866262: How do I write an equation with root 2 and -3.
Click here to see answer by fcabanski(1391)

Question 866289: Given x= √2 + √3 is a solution to the equation f(x)= 0, find f(x)
Many thanks
Click here to see answer by Fombitz(32388)

Question 866548: When i purchased my new boots, I saved 15% off the marked price because of my loyalty card. if i saved $57,what was the actual marked price of these boots in the store?
Click here to see answer by jim_thompson5910(35256)

Question 866741: y^2 = 0.25
Click here to see answer by jim_thompson5910(35256)

Question 866740: Solve each of the following quadratic equations by factorising.
1/3x^2 - 1/2x = - 1/6
Click here to see answer by Alan3354(69443)

Question 866737: Solve each of the following quadratic equations by factorising.
2 (x^2 + 1) = 5x
Click here to see answer by Fombitz(32388)

Question 866714: 4(t+6)^2=160
Click here to see answer by Fombitz(32388)

Question 866821: The age of a man is twice the square of the age of his son.8 years hence, the age of the man will be 4 years more than 3 times the age of his son. Find their present ages.
Click here to see answer by dkppathak(439)

Question 866829: (2x^3 + 3x^2 - 30x +3)/ (x-3)
Find the quotient. Cannot figure out
Click here to see answer by ewatrrr(24785)

Question 867045: A rectangular tract of land 40 feet by 46 feet is to have a rectangular swimming pool built in the middle of it. The pool is to occupy 60% of the area of the tract. The edges of the pool area are to be the same distance from the edges of the tract. What are the dimensions of the pool?
Click here to see answer by josgarithmetic(39617)

Question 867179: A shopkeeper buys a certain number of books for Rs.720.if the cost per book was Rs.5 less, thenumber of books that could be bobought for Rs.720 could be 2 more.taking the original cost of each book to be Rs.x, write an equation and solve it.
Click here to see answer by richwmiller(17219)

Question 867155: An aeroplane flying with a wind of 30km/hr takes 40 minutes less to fly 3600 km, than what it would have taken to fly against the same wind.Find the plane's speed of flying in still air.
Click here to see answer by josgarithmetic(39617)

Question 867299: It would be greatly appreciated if you would be able to help me with:
Use the square-root method to find the x-intercepts for:
5x^2 -45=0
Thanks for your help!
Click here to see answer by ewatrrr(24785)

Question 867451: The height, h(t), in meters, of the trajectory of a ball is given by h(t)=1.8+25-4.9 t^2 , where t is the time in flight, in seconds. determine the maximum height of the ball and the time when that height is reached. show all your work.
Click here to see answer by solver91311(24713)

Question 867512: I need help with the following:
Write the equation of a hyperbola with the center at (-5,-3) vertices at (-5,-5) and (-5,-1) and co vertices at (-11,-3) and (1,-3)
Thank you
Click here to see answer by lwsshak3(11628)

Question 867556: Let A be a point on the curve C: x^2 + y^2 - 2x - 4 = 0. If the tangent line to C at A passes through the point P(4, 3) then the length of AP is _____
I've been stumped on this for hours, any help would be greatly appreciated. Thank you!
Click here to see answer by josgarithmetic(39617)

Question 867542: Find an equation of a parabola with
a) focus (5,0) and directrix x = -5
b) focus (0,-7) and directrix y = 7
Can you please help me out? Thanks so much in advance:)

Click here to see answer by josgarithmetic(39617)

Question 867606: Determine k such that the solutions of are complex numbers.
Click here to see answer by josgarithmetic(39617)

Question 867544: Find an equation of a parabola with
a) focus(0,-7) and directrix x = 7
b) focus(5,0) and directrix x = -5
Thanks so much in advance:)
Click here to see answer by lwsshak3(11628)

Question 867787: 16-12=+4 what are the conclusion for this problem I was trying to find the discriminant
Click here to see answer by Alan3354(69443)

Question 867810: trying to do quadratic formula of x^2-3x-8=0
Click here to see answer by josgarithmetic(39617)

Question 867750: what are the roots of the equation :- x^2 - underroot 3 = 0.

Click here to see answer by jsmallt9(3758)

Question 867715: if one root of the polynomial p(x)=5x^2+13x+m is the reciprocal of the other find the value of m
Click here to see answer by jsmallt9(3758)

Question 867900: I need help on setting this problem up!? "A rectangular garden is fenced on 3 sides with a wall forming the 4th side. The total length of the fence is 30m. The area of the garden is 112m squared. Find the dimensions of the garden."
Click here to see answer by ankor@dixie-net.com(22740)

Question 868017: rewrite each relation in the form of y=(x-s)(x-t).
solve. y=-2x^2+2x+4
Click here to see answer by ewatrrr(24785)

Question 867883: Solve the following equation.
(x^2)/(x^2+4x) - (5x-10)/(x^2+2x-8) = 0
Click here to see answer by Fombitz(32388)

Question 868294: Determine the quadratic function f whose graph is given.
The vertex is (4,-3) and the other point is (3,-1)
f(x)=a(x-h)^2+k
write answer in form: ax^2+bx+c
Answer= 2x^2-16x+29
Can someone break this down for me, especially how to get the 29.
Thank you.

Click here to see answer by ewatrrr(24785)

Question 868338: The expression for the length of a rectangular garden is x+3 and the expression for width is x-4 if the area of the garden is 60 square feet find the value of x
Click here to see answer by stanbon(75887)

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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, 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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, 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