Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 118816: What are the values o k which will give 4x^2+(k+7)x+(k+4)=0 equal,real roots? Please help me?
Click here to see answer by ilana(307)

Question 118821: In the geometric sequence the first three terms are ( 5x-8,3x,2x+2,...).What is the value of x ? Please help me :)
Click here to see answer by Earlsdon(6287)

Question 118817: What function has x-intercepts -2/7 and 5/3 ? I think the answer is y=21x^2-29x-10 but I'm really not sure if I know what I'm doing. Can someone please explain it to me? Thanks.
Click here to see answer by Earlsdon(6287)

Question 118837:
Pat has a garden next to her house with the dimensions 3m by 10m. She wants to double the area of her garden by digging a border of even width around three of its sides. How wide of a border should she dig
Click here to see answer by checkley71(8403)

Question 118843: A 14 foot ladder leans against the side of a house. How high does the ladder reach if the distance between the bottom of the ladder and the house is 11 feet less then the distance between the top of the ladder and the ground.
Click here to see answer by checkley71(8403)

Question 118786: driving down a mountain, tom finds that he has descended 1800 ft in elevation by the time he is 3.25 mi horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundredth.
Click here to see answer by checkley71(8403)

Question 118849: xy+10x-4y-40 factor by grouping

Click here to see answer by jim_thompson5910(28595)

Question 118862: What are the procedures to write a quadratic equation in vertex form?
Click here to see answer by MathLover1(6632)

Question 118862: What are the procedures to write a quadratic equation in vertex form?
Click here to see answer by Edwin McCravy(8909)

Question 118819: Given the quadratic equation x^2-15=2k(x-4),find k if there are two real and equal roots. I got k=5 and k=3 but I would appreciate it if someone could explain it in detail to me :) Thanks.
Click here to see answer by scott8148(6628)

Question 118938: kindly help me with this problem regarding quadratic equation - factoring method:
8x^2 = 3x
Click here to see answer by HyperBrain(694)

Question 118925: I have plugged this one into the solver and that confused me even more.
Solve by completing the square:
x^2 + 8x + 13 = 0
I get to (x+4)^2 =3 and then I hit a wall.
Please help!!
You guys are great and thank you in adavnce for your help.
Click here to see answer by tutor_paul(490)

Question 118942: If the first three terms of an arithmetic sequence are (2x+1,4x+2,10x-1,...), what is the value of x? Please can someone explain ? I think the answer is 1 but I don't really understand this question.
Click here to see answer by mayank(15)

Question 118944: What function best describes the sequence ( 7,-1,-9,-17,...)? I think it is tn= -8n+1 but I'm not sure . Can someone please explain this to me? Thanks.
Click here to see answer by mayank(15)

Question 118943: A quadratic function has a vertex at (-3,4) and a y-intercept at 1. What is the vertical stretch factor ? I'm guessing 1/3 or 3 but I'm not sure :( Please help me :)
Click here to see answer by MathLover1(6632)

Question 118963: x squared - 5x + c =0
How do you find "c"? I attempted factoring the left side, but my efforts amounted to nothing? I'm confused. Please help?
Click here to see answer by checkley71(8403)

Question 118945: A group of students decide to buy a Christmas gift for their math teacher. They agree to share the $32 cost equally. Unfortunately,3 students must back out at the last minute, thus increasing each person's share by $2.40. How many students contributed to the gift ? Write the equation and solve.
I wrote 32/x - 32/x-3 =2.40 but I'm not sure, can someone please explain this in detail to me ? Thanks :)
Click here to see answer by Fombitz(13828)

Question 118946: A quadratic equation is given by y=2x^2 - 6bx+3.What is the value of 'b' if the equation of the axis of symmetry is x=9 ? I think the answer is 6 but I really don't fully understand, can someone please explain this to me ?
Click here to see answer by jim_thompson5910(28595)

Question 118941: What is the value of k if one root root of (3k+1)x^2=-5 is 1? Please help me :)
Click here to see answer by stanbon(57346)

Question 119021: The sum of the base and height of a triangle is 25 cm. What is the maximum area of the triangle?
Click here to see answer by solver91311(16885)

Question 119027: I know its got to be simple, but I just don't understand quadratic equations. 12x^+5x-3=0 ^=squared
Click here to see answer by stanbon(57346)

Question 119027: I know its got to be simple, but I just don't understand quadratic equations. 12x^+5x-3=0 ^=squared
Click here to see answer by solver91311(16885)

Question 119051: can you explain this Quadratic equation in steps how to get the answer. y=-0.027x^2+1.35x
Click here to see answer by jim_thompson5910(28595)

Question 119071: (n-1)(n)(n+1)=210
Click here to see answer by checkley71(8403)

Question 119071: (n-1)(n)(n+1)=210
Click here to see answer by stanbon(57346)

Question 119086: kindly solve this quadratic equation using factoring method
m^2/18 - m/6 - 1 = 0
Click here to see answer by HyperBrain(694)

Question 119084: please solve this problem on quadratic equation using factoring method
(2x-3)^2 = 25
Click here to see answer by HyperBrain(694)

Question 119085: kindly solve this quadratic equation using factoring method
x(3x+2) = (x+2)^2
Click here to see answer by HyperBrain(694)

Question 119081: kindly answer this problem on quadratic equation using factoring method:
4x^2 = 9

Click here to see answer by HyperBrain(694)

Question 119093: Determine a quadratic equation with integer coefficients that has roots -1+-4sqrt2/2. Can someone please help explain this to me ?
Click here to see answer by Edwin McCravy(8909)

Question 119108: # 7 sketch graph of the function. label coordinates of vertex. lesson 9.4.
y=-x^2+2x-3

Click here to see answer by tutorcecilia(2152)

Question 119096: For what value(s) of 'p' would the equation px^2 + (2p+1)x+p=0 have two non-real roots? I think it is p=-1/4 but I'm only guessing.
Click here to see answer by jim_thompson5910(28595)

Question 119097: Determine the value of 'k' if the product of the roots of 3kx^2+2(x-1)+k=0 is 1.
Click here to see answer by josmiceli(9678)

Question 119097: Determine the value of 'k' if the product of the roots of 3kx^2+2(x-1)+k=0 is 1.
Click here to see answer by solver91311(16885)

Question 119129: 2x^2-7x=4
Click here to see answer by jim_thompson5910(28595)

Question 119129: 2x^2-7x=4
Click here to see answer by edjones(7569)

Question 119128: x/2-18/x+5/2=0
Click here to see answer by jim_thompson5910(28595)

Question 119083: please solve this using quadratic equatin with factoring method

t^2 - t/4 + 1/5 = 0
Click here to see answer by checkley71(8403)

Question 119095: The equation V=12(1.25)^t describes the value (V) of a hockey card t years after purchase.
a) What was the initial value of the hockey card?
b) What was tha rate of appreciation expressed as a percentage?
c) What will be the cards value 5 years after it was purchased?
d) Use the graphing calculator to determine the number of years it would take for the card to be worth $71.53.
For (a) I got $12 , for (b) I got 25% but I am not sure. Can someone please explain this to me. Thanks:)
Click here to see answer by Fombitz(13828)

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