Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 543969: r^2=9
Click here to see answer by umnikmo(75)

Question 544053: the area of a pond is 44 square meters. what is the radius?
Click here to see answer by JBarnum(2044)

Question 544108: Use the quadratic formula to solve the equation.
5x^2 + 12x + 3 = 0
here is what I have tried
5x^2+12x=-3
12/2 = 6^2 = 36
5x^2+12x+36=-3+36
5x^2+12x+36=33
factor
5(x+6)(x+6)=33
5(x+6)^2=33
5x+180=33
5x=-147
5x/5=-147/5
I am lost from here

Click here to see answer by richwmiller(9144)

Question 544789: Multiply
3x + 3
by
-4x2 + 4x – 2 (Points : 20)

Click here to see answer by rfer(12730)

Question 544834: Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.
8x2 + 2x + 4 = 0 (Points : 10)
Two different irrational solutions
Two different imaginary solutions
Exactly one rational solution
Two different rational solutions

Click here to see answer by stanbon(57967)

Question 544765: a ball is thrown straight up from a rooftop 240ft high. The ball misses the rooftop on the way down.When will the ball be at 120 ft. identify solution on a graph h=-16t^2+56t+240
Click here to see answer by stanbon(57967)

Question 544832: Use polynomial long division to divide
12x3 – 9x2 + 13x + 4
by
3x2 – 3x + 4 (Points : 20)

Click here to see answer by saifoo.khan(162)

Question 544831: Multiply
3x + 3
by
-4x2 + 4x – 2 (Points : 20)

Click here to see answer by saifoo.khan(162)

Question 544787: Use polynomial long division to divide
12x3 – 9x2 + 13x + 4
by
3x2 – 3x + 4 (Points : 20)

Click here to see answer by mananth(12270)

Question 544882: write a quadratic function in standard form for the given set of zeros: -5 and 4.
Click here to see answer by Earlsdon(6294)

Question 544350: how do we translate y=x^ to get a graph of y=(x-4)^ ??
Click here to see answer by jim_thompson5910(28715)

Question 544272: write a quadratic function using 5 and 3
Click here to see answer by jim_thompson5910(28715)

Question 545103: express in terms of i 2square root -36
Click here to see answer by jim_thompson5910(28715)

Question 545038:
what is the graph for ?
The vertex is (0, -7), and the axis of symmetry is x=0.
Click here to see answer by Earlsdon(6294)

Question 545297: Solve the equation.
2p^3 - 7p^2 - 50p + 175 = 0
I tried factoring out a p and then FOILing the remaining part while ignoring the " + 175 " part, but it didn't work. :(
Click here to see answer by jim_thompson5910(28715)

Question 545459: x^2+40x-45=0
Click here to see answer by jim_thompson5910(28715)

Question 545446: use the quadratic formula to solve:3x^2+2x-4=0?
A)x=-1
B)x=sqrt(13)
C)x=-1-sqrt(13)
D)x=-1/3
E)=-1+sqrt(13)/3
Click here to see answer by jim_thompson5910(28715)

Question 545461: solve (x-3)(x+2)=x+2

thank you
Click here to see answer by josmiceli(9817)

Question 545590: give exact and approximate solution to three decimal places
x^2+14x+49=1

Click here to see answer by jerryguo41(162)

Question 545464: factor completely: a^2p^2 + q^2-p^2 - a^2q^2

thank you
Click here to see answer by ankor@dixie-net.com(15746)

Question 545713: andy's average driving speed for a 4 hour trip was 45 miles per hour. during the first 3 hours he drove 40 miles per hour. what was his average speed for the last hour on his trip?

Click here to see answer by smmoore(10)

Question 545788: 2x+√x+1=8
Click here to see answer by saifoo.khan(162)

Question 545791: 1\x-1=x\x+1
Click here to see answer by saifoo.khan(162)

Question 545809: solve for x: x^2-x=7
Click here to see answer by JBarnum(2044)

Question 545879: what could be a real life example of a exponential function?
Click here to see answer by mananth(12270)

Question 545879: what could be a real life example of a exponential function?
Click here to see answer by Alan3354(31522)

Question 545993: Determine the graph of the quadratic equation y = x2 - 2x + 3
Click here to see answer by JBarnum(2044)

Question 546238: x²+6=0
Determine the nature of the solutions of the equation.
I need help please

Click here to see answer by KMST(1936)

Question 546484: Pleasehelpmesolvethisequatio(ax2+bx+c=0)
Click here to see answer by JBarnum(2044)

Question 546693: how do i create an equation (in standard form) of a parabola?
Click here to see answer by Edwin McCravy(8999)

Question 546819: A rectange shed covers 300 feet of ground. It is 6 feet longer than it is wide. What is the width of the shed to the nearest tenth of a foot?
This is what I tried:
x = width
x + 6 = length
Area of a Rectangle = 300
What I set up: 300 = x(x + 6)
Which then I got: 300 = x^2 +6x
That is all I could figure out.
Click here to see answer by Earlsdon(6294)

Question 546739: A towns old street sweeper can clean the streets in 60h. The old sweeper together with the new sweeper can clean the street in 15h. How long would it take the new one to do the job alone?
Click here to see answer by ankor@dixie-net.com(15746)

Question 546898: Directions say to factor completely
7r-3rt+7s-3st
I don't know what to do next help!
Click here to see answer by mananth(12270)

Question 547048: the illumination produced by a light source depends on the distance from the source. For a particular light source, this relationship can be expressed as i=(4050)/(d^2), where i is the amount of illumination in footcandles and d is the distance from the light (in feet). How far from the source is the illumination equal to 50 footcandles?
Click here to see answer by ankor@dixie-net.com(15746)

Question 547162: A concrete bridge over a river has an underside in the shape of a parabolic arch. At the water level, the arch os 20m wide. It jas a maximum height of 10m about the water. The minimum vertical thickness of the concrete is 1.5m.
a) find an algebraic relation that represents the shape of the arch.
Click here to see answer by ankor@dixie-net.com(15746)

Question 547628: x^2+12x+18 Whats the Answer For this problem i need Help
Click here to see answer by saifoo.khan(162)

Question 547618: 3x^2+39x+108=0
Click here to see answer by mananth(12270)

Question 547764: Solve:(5w + 2)^2 - 3(5w + 2) - 4 = 0
Appreciate all help/feedback.
Click here to see answer by mananth(12270)

Question 547768: State the values of a, b, c for the equation. Then find the value of the discriminant for the equation 3x^2-5x=2. And please show the work
Click here to see answer by mananth(12270)

Question 547867: Find the equation of the quadratic function with zeros 10 and 14 and a vertex at (12, -8)
Click here to see answer by scott8148(6628)

Question 548128: (x-1)^2=20
Click here to see answer by mananth(12270)

Question 548108:
Keith leaves his house for Sarah’s house riding his bicycle at 8 miles per hour. At the same time, Sarah leaves her house heading toward Keith’s house walking 3 miles per hour. The system of equations that represents the distance, d, each is from Sarah’s house in h hours is given below:
d=8.25-8h
d=3h
what does the solution of this system represent?

Click here to see answer by mananth(12270)

Question 548218: Write a quadratic function in standard form with zeros 6 and -8?
Click here to see answer by nerdybill(7008)

Question 548218: Write a quadratic function in standard form with zeros 6 and -8?
Click here to see answer by mathie123(224)

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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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