Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 143077: What are the steps needed to solve this equation 4(9x - 1) = 9x(4 - x)
Click here to see answer by stanbon(57356)

Question 143105: 3x+y=-4
Click here to see answer by jim_thompson5910(28595)

Question 143100:
a. Solve using the quadratic formula: x^2-6x-7=0
Click here to see answer by jim_thompson5910(28595)

Question 143114: Find the slope, if it exists of the line containing the pair of points
(2, 5) and (3, -9)
The slope m = ?
Will someone please help me with this I do not understand.
Click here to see answer by Earlsdon(6287)

Question 143110: Find the domain of the function.
p(x)=x2-2x+7 (the 2 by the x is a little 2 that is above the x, not a regular number 2)
Will someone help please, how do I figure this out? The =x2 actually equls 4?is that correct? HELP.
Click here to see answer by oscargut(891)

Question 143158: Solve using the quadratic formula:
y^2-3y-10=0
Click here to see answer by checkley77(12569)

Question 143109: I have a few more questions today, and I really need your help please. Thank you all for your past help it is really appreciated and lots of help to me. Thanks again!!!
The function H described by H(x) = 2.75x + 71.48 can be used to predict the height, in centimeters, of a woman whose humerus bone is X cm long. Predict the height of a woman whose humerus is 33 cm long. Do I add the 2.75+71.48 then dived by 33?? I do not understand this makes no sense will someone please help me??
Click here to see answer by checkley77(12569)

Question 143173: I,need some help in solving these problem,here i'm looking for the domain in these two problem. g(x)=log(x+3) and g(t)=In(t-1).Could you please help me in finding the answer? Thanks :)

Click here to see answer by oscargut(891)

Question 143113: Solve the system of equations by graphing. Then classify the system as consistant or inconsistant, dependent or indepenent?
9x-9y=63
9y-9x=-63
Help me please with this one.
Click here to see answer by MathTutorer(13)

Question 143086: Is it possible to have different quadratic equations with the same solution?
Click here to see answer by pcsp_kumat(6)

Question 143265: Graph the equation y=4. Now with this I would simply put the point on the 'y' line on a graph. That is the up and down line not the straight across right??
Click here to see answer by jim_thompson5910(28595)

Question 143264: y - 5 > -17
Is the answer -12? and I also have to graph this also. Would the graph be an [ on the -12 on the graph line and the arrow point towards minus -13, and -14 ect? Or is it not the [ or a ), ( instead? So cinfused with these. Help please.
Click here to see answer by jim_thompson5910(28595)

Question 143293: I am confused. o.k. the problem is xsquared+7x+9=0 i do not get how to find the vertex . i know it has to do with the it being max or miminmum . right ?
Thanks for the help !!
- confused

Click here to see answer by stanbon(57356)

Question 143295: what are the steps to solving quadratic equations by using the quadratic formula??
like what to do is steps (step 1,step 2,step 3..............
Click here to see answer by checkley77(12569)

Question 143280: A rectangular painting has dimensions X and X+10. the painting is in a frame 2 in. wide. The total area of the picture and the frame is 900 in^2. What are the dimensions of the painting?
Click here to see answer by checkley77(12569)

Question 143330: Which of the following pair of points is indicative of a zero per the Intermediate Value Theorem?
a. (0,0) and (2,-3)
b. (-2,-3) and (2,3)
c. (2,0) and (0,-3)
d. (3,-4) and (-6,12)
Click here to see answer by stanbon(57356)

Question 143403: 50-word response to the following: How do you know when an equation has infinitely many solutions? How do you know when an equation has no solution?
Will someplease explain this to me in just plain old english so that I understand it?
Click here to see answer by solver91311(16890)

Question 143425: I need your help how do you solve x^2-2x-9=0

Click here to see answer by mathgeek102(3)

Question 143435: 2. You are trying to decide how to most efficiently use your oven. You do not want the oven running at a high temperature when it is not baking, but you also do not want to waste a lot of time waiting for the oven to reach the desired baking temperature.
The instruction manual on the industrial oven suggests your oven temperature will increase by 45 degrees Fahrenheit per minute. When the over is initially turned on, the temperature is 70 degrees Fahrenheit. What will the temperature of the oven be after 7 minutes? Write an expression and explain how you arrived at your answer.
Now HOW do I figure and write this expression? Help please.

Click here to see answer by stanbon(57356)

Question 143436: WIll someone please help me with this word problem? I do not understand these AT ALL???? Please and thank you all for your help. It is much appreciated.
In your industrial oven, you bake two baking sheets with 12 scones each, two baking sheets with 20 cookies each, and one baking sheet with 2 scones and 10 cookies.
Write an expression that illustrates the total cost of all baked goods in the scenario above using the variable s to represent the cost of scones and the variable c to represent the cost of cookies. Simplify your expression by combining like terms.
Suppose you have decided to price the scones at $2.28 each and the cookies at $1.19 each. How much total revenue would result from selling all the scones and cookies baked in the oven at one time?

Click here to see answer by solver91311(16890)

Question 143444: i forgot what to do if the equation is not equal to zero. a fast response would be aprreciated
Click here to see answer by Earlsdon(6287)

Question 143398: What are some examples of word problems from day to day life that can be translated to quadratic equations?
Click here to see answer by nabla(475)

Question 143300: (x+7)(x-9)= 1-2x
Click here to see answer by nabla(475)

Question 143484: For this formula find the (a)vertex; (b)axis of symmetry;(c)determine whether there is a maximum or minimum value and find that value; and (d) graph the function:
g(x) = -2x^2 + 2x +1
I know the answer--its in my book, but I cannot seem to figure out how to get to that answer. please help!!!!
Click here to see answer by nabla(475)

Question 143466: For this formula find the (a)vertex; (b)axis of symmetry;(c)determine whether there is a maximum or minimum value and find that value; and (d) graph the function:
g(x) = 2x^2 + 6x + 8
I know the answer--its in my book, but I cannot seem to figure out how to get to that answer. please help!!!!
Click here to see answer by nabla(475)

Question 143518: Write the quadratic formula_____________________
Click here to see answer by nabla(475)

Question 143522: The process of writing a quadratic equation in the form (x + a)2nd power = b is called what?__________
Click here to see answer by jim_thompson5910(28595)

Question 143562: Just need help with d), unless of course the others are wrong. Which very well could be. Any help would be of help. Thank you.
What are the intercepts of the equation from part a of this problem? What are the intercepts from part b of this problem? Where would the lines intersect if you solved the system by graphing?
1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city.
a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56 houses available. Use x to represent floor plan #1 and y to represent floor plan #2. Write an equation that illustrates the situation. x + y = 56
b) The sales representative later indicates that there are 3 times as many homes available with the second floor plan than the first. Write an equation that illustrates this situation. Use the same variables you used in part a. x = 1x y = 3x
c) Use the equations from part a and b of this exercise as a system of equations. Use substitution to determine how many of each type of floor plan is available. Describe the steps you used to solve the problem. x = 14 y = 42
d) What are the intercepts of the equation from part a of this problem? What are the intercepts from part b of this problem? Where would the lines intersect if you solved the system by graphing?

Click here to see answer by solver91311(16890)

Question 143563: Again I beleive I have a, b done but need help with c, can someone help please?
2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it.
a) The sales representative here tells you they also have two floor plans available, but they only have 38 homes available. Write an equation that illustrates the situation. Use x and y to denote floor plan #1 and floor plan #2 respectively. x + y = 38
b) The representative tells you that floor plan #1 sells for $175,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $7,200,000. Write an equation that illustrates this situation. Use the same variables you used in part a. $175000x + $200000y = 7200000
c) Use elimination to determine how many houses with each floor plan are available. Explain how you arrived at your answer.

Click here to see answer by stanbon(57356)

Question 143564: Need help with this word problem if some one would have the time please, and thank you!!
3. You recently started the paperwork to purchase your new home, and you were just notified that you can move into the house in 2 weeks. You decide to hire a moving company, but are unsure which company to choose. You search online and are interested in contacting two companies, Heavy Lifters and Quick Move, to discuss their rates. Heavy Lifting charges an $80 fee plus $35 per hour. Quick Move charges $55 per hour with no additional fees.
a) Which mover provides a better deal for 2 hours of work? How did you arrive at your answer?
b) Which mover provides a better deal for 15 hours of work? How did you arrive at your answer?
c) For what values h (hours) does Quick Move offer the better deal? Express your answer as an inequality. Explain how you reached your answer.

Click here to see answer by stanbon(57356)

Question 143568: How do I solve? Find the value of the discriminant to determine the number of real-number solutions for thi quadratic equation:
x^2-8x+3=0
Click here to see answer by stanbon(57356)

Question 143511: solve the quadratic formula.
4 + 4x = 2x to 2nd power
Click here to see answer by checkley77(12569)

Question 143579: How do I solve? Use the dicriminant to determine whether the graph of each quadratic function intersects the x-axis in zero, one, or two points:
p=-3q^2+4q+2
Click here to see answer by scott8148(6628)

Question 143606: Hello, I am completely stumped on the following 2 questions. Any help would be appeciated.
Question #1 is -6/x - 3/x^2 = 2
Question #2 is - 6/x + 6/x+9 = 1
It says I can solve by any method, but I cannot figure how to solve these with either the quadratic equation or by completing the square. If you can point me in the right direction. Thanks.
Click here to see answer by nabla(475)

Question 143597: please help me to answer this question, the directions are:
determine the intervals of increasing and decreasing.
f(x)=-2x^3-3x^2+12
Click here to see answer by nabla(475)

Question 143569: How do I solve? Find the value of the discriminant to determine the number of real-number solutions for this quadratic equation:
2m^2-m-6=0
Click here to see answer by nabla(475)

Question 143576: How do I solve? Use the discriminant to determine whether the graph of each quadratic function intersect the x-axis in zero, one, or two points:
y=2x^2-4x-6
Click here to see answer by vleith(2825)

Question 143626: Thank you in advance for your help with this problem. p=sqrt(-4p+17)+3
Click here to see answer by scott8148(6628)

Question 143650: x^2 + 20x = 200
Click here to see answer by jim_thompson5910(28595)

Question 143661: (3x+5)²
Click here to see answer by jim_thompson5910(28595)

Question 142662: Find the slope. Will someone please help with this?
(2,5) (3,-9)

Click here to see answer by zephyr(9)

Question 143660: (3x+5)2 = 0 [2 is a square sign ]
Click here to see answer by jim_thompson5910(28595)

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