Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 76134: Hi, I need desperate help in solving quadratic equations, I just can’t seem to understand it and keep getting the wrong answers when I try.
I need help on page #575 on question #24. I need to solve the roots of each quadratic equation using the factoring method, and place the equation in standard form before factoring:

P^2+15p+25=6p+5

Please help, Thanks!

Click here to see answer by checkley75(3666)

Question 76107: The demand and supply equations for a certain item are given by
D = 5p + 40
S= -p^2 + 30p -8
Find the equilibrium Price.
I am needing serious help with this. I am lost with this problem and need some help. Thanks.
Click here to see answer by ankor@dixie-net.com(15622)

Question 76221: Write the following phrase, using symbols.
The sum of m and n, divided by the difference of m and n

Click here to see answer by stanbon(57203)

Question 76225: The kinetic energy of a particle of mass m is found by taking one-half of the product of the mass (m) and the square of the velocity (v). Write an expression for the kinetic energy of a particle.
Click here to see answer by stanbon(57203)

Question 76226: Suppose that the temperature outside is dropping at a constant rate. At noon, the temperature is 70oF and it drops to 58oF at 5:00 pm. How much did the temperature drop each hour?
Click here to see answer by bucky(2189)

Question 76224: It is estimated that the Earth is losing 4000 species of plants and animals every year. If S represents the number of species living last year, how many species are on Earth this year?
Click here to see answer by scott8148(6628)

Question 76222: Write the following phrase, using symbols.
The quotient when 3 more than a number is divided by 3 less than that same number

Click here to see answer by scott8148(6628)

Question 76237: A triangle has 3 sides,3x + 7,4x - 9, and 5x + 6. find the expression that represents its perimeter.
Click here to see answer by chitra(359)

Question 76235: The simple interest I on a principal of P dollars at interest rate r for time t, in years, is given by I = Prt. Find the simple interest on a principal of $6000 at 3% for 2 years. (Hint: 3% = 0.03)
Click here to see answer by chitra(359)

Question 76234: At 7 am, the temperature was - 15oF. By 1 pm, the temperature had increased by 18oF. What was the temperature at 1 pm?
Click here to see answer by chitra(359)

Question 76155: How do you write 4*x^3*y-20*x^2*y+16*x*y as a product? I got part of the question and factored the problem to 4xy(x^2-5x+4) but how do you finish the problem?
Click here to see answer by jim_thompson5910(28476)

Question 76242: Ramon owes $780 on his VISA account. He returns three items costing $43.10, $36.80, and $125.00 and receives credit on his account. Next, he makes a payment of $400. he then makes a purchase of $82.75. How much does Ramon still owe?
Click here to see answer by chitra(359)

Question 76249: When using the quadratic formula to solve a quadratic equation ax2 + bx + c = 0, the discriminant is b2 - 4ac. This discriminant can be positive, zero, or negative. (When the discriminant is negative, then we have the square root of a negative number. This is called an imaginary number, sqrt(-1) = i. )
Explain what the value of the discriminant means to the graph of y = ax2 + bx + c. Hint: Chose values of a, b and c to create a particular discriminant. Then, graph the corresponding equation?
Click here to see answer by Edwin McCravy(8879)

Question 76243: Ramon owes $780 on his VISA account. He returns three items costing $43.10, $36.80, and $125.00 and receives credit on his account. Next, he makes a payment of $400. he then makes a purchase of $82.75. How much does Ramon still owe?
Click here to see answer by tutorcecilia(2152)

Question 76233: Ramon owes $780 on his VISA account. He returns three items costing $43.10, $36.80, and $125.00 and receives credit on his account. Next, he makes a payment of $400. he then makes a purchase of $82.75. How much does Ramon still owe?
Click here to see answer by Poohbear272(22)

Question 76281: Solve (x-5)^2 = 6
I just need to verify my answer of . Is this correct? Thanks so much for your help.
Click here to see answer by bucky(2189)

Question 76279: I really need some help with this. Please. Find the axis of symmetry.
Y = x^2 + 5x -9
Thanks
Click here to see answer by stanbon(57203)

Question 76350: 1) Using the quadratic equation x2 - 6x + 8 = 0, perform the following tasks:
a) Solve by factoring.
Answer:
Show work in this space.

b) Solve by using the quadratic formula.
Answer:
Show work in this space.

Click here to see answer by jim_thompson5910(28476)

Question 76383: Amanda has 400 feet of lumber to frame a rectangular patio (the perimeter of a rectangle is 2 times length plus 2 times width). She wants to maximize the area of her patio (area of a rectangle is length times width). What should the dimensions of the patio be, and show how the maximum area of the patio is calculated from the algebraic equation. Use the vertex form to find the maximum area.
Answer:
Show work in this space.

Click here to see answer by stanbon(57203)

Question 76424: Can you help me with this please??
When using the quadratic formula to solve a quadratic equation ax2 + bx + c = 0, the discriminant is b2 - 4ac. This discriminant can be positive, zero, or negative. (When the discriminant is negative, then we have the square root of a negative number. This is called an imaginary number, sqrt(-1) = i. )
Explain what the value of the discriminant means to the graph of y = ax2 + bx + c. Hint: Chose values of a, b and c to create a particular discriminant. Then, graph the corresponding equation.

Click here to see answer by Edwin McCravy(8879)

Question 76406: For the function y = x2 - 6x + 8, perform the following tasks:
Put the function in the form y = a(x - h)2 + k.

Click here to see answer by galactus(183)

Question 76454: Need to solve the quadratic formula and state if there are no real roots or not for question #8 on page #588:
X^2+9x+7=0
The help is greatly appreciated!

Click here to see answer by checkley75(3666)

Question 76447: On page #588, question #20, I need to solve the quadratic formula and state if there are no real roots or not. Can someone please help?
3x^2-4x+2=0
Thanks for your help!

Click here to see answer by checkley75(3666)

Question 76446: I need help on page #575 on question #20. I need to solve the roots of each quadratic equation using the factoring method, and place the equation in standard form before factoring:

X^2=10x-24

Thanks for your time. =)

Click here to see answer by checkley75(3666)

Question 76458: I really need some help - my assignment is due tomorrow night and I have about 6 more problems. Here is one, if someone can help me:
for the function of y = x2 - 6x + 8 what is the equation for the line of symmetry for the graph of this function.
Any help will be so appreciated.
Thanks
Click here to see answer by scott8148(6628)

Question 76453: I need to write in standard form and determine the values of a, b, and c, for question #4 on page #575:
4x^2+20x= 0
I tried it like this, but don’t know if it is correct:
A= 4
B= x^2
C=20
Thanks for the help!

Click here to see answer by checkley75(3666)

Question 76539: Need to solve the quadratic formula and state if there are no real roots or not for question #10 on page #588:
3x^2+7x-6=0
Thanks!

Click here to see answer by jim_thompson5910(28476)

Question 76538: I need to solve the quadratic formula and state if there are no real roots or not for question #14 on page #588:
3=7x-4x^2
Appreciate the help.

Click here to see answer by jim_thompson5910(28476)

Question 76541: I don't know exactly how to get this form y=a(x-h)^2+k from the function y=x^2-6x+8. I don't know how to get this function into this particular form.
Click here to see answer by scott8148(6628)

Question 76563: I have the problem:
12q to the second -36 q+27
I was asked to factor. I did but I don't think I did it right and would like to compare to someone. Thanks for the help
Click here to see answer by rmromero(383)

Question 76574: I don't know exactly how to go about solving this one problem. Here's is the question I have to answer. Amanda has 400 feet of lumber to frame a rectangular patio (the perimeter of a rectangle is 2 times length plus 2 times width). She wants to maximize the area of her patio ( area of a rectangle is length times width). What should the dimensions of the patio be, and show how maximum area of the patio is calculated from the algebraic equation. Use the vertex form to find the maximum area. I can only get so far and don't know how to go about solving it.
Click here to see answer by Earlsdon(6287)

Question 76578: I need help factoring this: 2xsquared-x+1
Click here to see answer by jim_thompson5910(28476)

Question 76581: u to the 8th power x u to the 3rd power
Click here to see answer by checkley75(3666)

Question 76650: This is an application question which I am not sure how to make into an equation
Engine failure forced Geraldine to pilot her Cessna 150 to an emergency landing. To land, Geraldine's plane glided 17,000 ft over a 15,000 ft stretch of deserted highway. From what altitude did the descent begin?
Click here to see answer by psbhowmick(529)

Question 76673: Square root of 2t minus t + 4 = 0
Click here to see answer by funmath(2925)

Question 76705: I get so confused with these problems I just don't understand.
It says Solve the Quadratic equations by factoring
(2x-7)(7x+2)=0 And so how would I go about solving this?
turn it into 14x(squared)-45x-14=0??? and then? ugggghh
Some one please help me!!
Thank you for yout time.
Click here to see answer by checkley75(3666)

Question 76707: Hi I just want someone to check to see if I did this right.
Quadratic equation
4x cubed -36x=0
4x (x squared -9) = 0
4x (x-3)(x+3) = 0
x=3 , x=-3 , and x=0
Is this right?
Thanks you

Click here to see answer by checkley75(3666)

Question 76783: I am having trouble finding the particular equation for the quadratic function described in the following situation.
The quarterback is standing on the opponents' 40-yard line. He throws a pass toward their goal line. The ball is 2 meters above the ground when the quarterback lets it go. It follows a parabolic path, reaching its highest point, 14 meters above the ground, as the 20-yard line.
Can you help
Click here to see answer by Nate(3500)

Question 76792: Simplify.
I am having a really hard time with this problem and need some help please thanks.
Click here to see answer by chitra(359)

Question 76793: Simplify.
This problem seemed very difficult and need to verify that my answer of is correct. Thanks so much for your time.
Click here to see answer by chitra(359)

Question 76795: Evaluate , if possible.
I have tried to figure this one out but I have not reached and acurate solution. I am acutally not sure if the solution should be 2 or -2. Could you please help me with this? Thanks.
Click here to see answer by checkley75(3666)

Question 76794: Use a calculator to approximate to the nearest hundredth.
I came up with 5.29. Is this correct?
Click here to see answer by checkley75(3666)

Question 76791: Solve by completing the square. x^2 -14x +49 = 0
I came up with the answer of 7, 7 for this problem. Is this correct? ______________________________________________________________________-
Solve. (x-2)^2 =7
I came up with two answers for this problem but the answer given for the test has only one and I need some help...Thanks. My answer is x=,x=. The options for this problem are:
a)+ 51
b)+
c)-2 +
d)2 +
________________________________________________________________________________
Solve.
I came up with the answer of -3 for this problem. Is this correct? The answer options are:
a)0
b)-2
c)-3
d)No Solution
_____________________________________________________________________________--
Find the distance between (10, 0) and (-1, 0).
I am not sure how to do this...the answers it provids is :
a)9
b)11
c)
D)19
Thanks for your help, it is very much appreciated in advance.

Click here to see answer by checkley75(3666)

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