Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 53228: 1) Using the quadratic equation x2 - 4x - 5 = 0, perform the following tasks:
a) Solve by factoring.
Answer:
Show work in this space.

b) Solve by completing the square.
Answer:
Show work in this space.

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

Thank You in Advance
Click here to see answer by funmath(2933)

Question 53308: The instructions say to sketch the graph of the quadratic function. Identify the vertex & x-intercept(s). I seem to be lost. I know to 1st factor it (I don't believe this can be factored). Then complete the square. I think this gives me x=2.549 & x-2.549 so,x={2.549,2.549} I do believe something went very wrong here & beyond. HELP!
Thanks Bunches
Click here to see answer by funmath(2933)

Question 53262: HI Everyone! I actually need help with my English homework and know there are alot of smart men and women working on here and cannot find any other help. I know this is really only for math but someone please help. Please let me know if it is okay to post my question about my english to one of you. Someone who is good with english grammr and writing. I hope one of you can help. \
Thanks
Click here to see answer by Nate(3500)

Question 53317: two consecutive postive integers sum of squares is 85
Click here to see answer by stanbon(75887)

Question 53317: two consecutive postive integers sum of squares is 85
Click here to see answer by EduDragon(8)

Question 53419: I am stuck on 3 math problems I have left for homework. COuld you please show me how to figure them out? thank you
I am supposed to define a variable, write the equation and solve.
Question:
The difference of 2 numbers is 12.
2/5th of the greatest number is 6 more than 1/3 of the lesser number. Find both numbers.
Click here to see answer by stanbon(75887)

Question 53438: Please help. I put on problem on a few moments ago but here is my last one and I can show you what I I have so far. I am really not good at this but am really trying.
Define a variable, write the equation and then solve.
Three times the greatest of 3 consecutive even integers exceeds twice the least by 38. Find the integers.
So I have so far on my paper (x)+(x+2)+(x+4) to represent the 3 integers right?
Then do I represent three times the greatest by 3x on the outside of the numbers or do I include all my integers by using 3 as an exponent? This is where I am confused and get stuck.
Thank you for any help.
Click here to see answer by Earlsdon(6294)

Question 53435: Could someone please help me try and solve this problem or point me in the correct direction on how to solve it. I am struggling with my last two math problems for homework. THANK YOU!
Here is the question.
Make a diagram to represent each situation. Then define a variable
The lengths of the sides of quadrilaterals are consecutive even integers. Twice the length of the shortest side plus the length of the longest side is 120 inches. Find lengths of all sides.

Click here to see answer by Earlsdon(6294)

Question 53511: solve please, and if you can, please show work...thanks
9x^2-9x=0
Click here to see answer by mathchemprofessor(65)

Question 53512: please solve and show work, thanks
6x^2-11x=2
Click here to see answer by bubblz190(11)

Question 53514: can someone please show me how to solve this problem
You need to choose between two telephone plans for local calls. plan a charges $25 per month for unlimited calls. plan b has a monthly fee of $13 with a charge of $0.06 per local call. how many local telephone calles in a month make plan a the better deal??
Click here to see answer by stanbon(75887)

Question 53513: am i posting this is the right place?
and can you please solve this and show how you did it..thanks

A truck can be rented from basic rental for $50 per day plus $0.20 per mile. roadrunners charges $20 per day plus $0.50 per mile to rent the same truck. how many miles must be driven in a day to make the rental cost for basic rental a better deal than that for roadrunners??
Click here to see answer by stanbon(75887)

Question 53573: HELP!
please explain to me and help w/ this problem::
x/2 + x/4 =5
and this:
25x/5 - 7x= 12
Click here to see answer by rchill(405)

Question 53651: Find the value of Q
P+R=4
Q*P+R=10
P+Q*R=14
Q=???
Click here to see answer by Edwin McCravy(20054)

Question 53634: the follow cryptogram was encoded with a 2 X 2 matrix 5,2,25,11,-2,-7,-15,32,14,-8,-13,38,19,-19,-19,37,16
the last word of the message is -Sue what is the message?
I am not sure what 2 by 2 matrix to use?
Click here to see answer by AnlytcPhil(1806)

Question 53783: P+R=4
Q*P+R=10
P+Q*R=14
Find value of Q
I am not a student anywhere. My brother gave me this quiz and I can't solve it.
Click here to see answer by jenrobrody(19)

Question 53784: i've tried this questin but i don't get how to do it.
Michelle threw a ball vertically upwards, with its height h, in metres, after a time of t seconds, being given the formula:
h=8t-t^2
Q. find after what time the ball is first at a height of 12m
Click here to see answer by stanbon(75887)

Question 53678: i need you help!!
how would you figure out the following problems
6x^2+-1+-12
AND
6x^2 -17x-12
AND
x2+-3x+10
we have to use the F.O.I.L prcess and show our work with Algebra Tiles
Click here to see answer by stanbon(75887)

Question 53842: 0=b^2-3b-10
Click here to see answer by rchill(405)

Question 53919: dearest tutors, please help me regarding my proble..i really need your help.,, if i cant get the ight answer by tomorrow, probably my teacher would let me squat on the floor!! help pleas!!
The problem:
1-8x/x to the power of two -3x-28= x+1/x+4- 2x+3/x-7..
i hope you understand this problem..
ps..i will translate it incase you didnt understand..
... it is 1 minus 8x all over x squared minus 3x minus twenty eight, equals x plus 1 all over x plus 4 minus, 2x plus 3 all over x minus seven
Click here to see answer by funmath(2933)

Question 54224: To be perfectly honest to you...I suck at word problems.
Here is the problem; Find two numbers such that their sum 10 and their product is 22.
Click here to see answer by checkley71(8403)

Question 54225: In order to find the domain for the below example, do you need to multiply by the denominator? What follows? Seems that the X-1 would remain? Just looking for the steps/logic. Thank you!

Click here to see answer by checkley71(8403)

Question 54237: To determine the slope of the line parallel to the line , do I assume that x=0 first then solve? Slope problems have me confused as to the steps and logic.
thank you
Click here to see answer by Edwin McCravy(20054)

Question 54236: I am absolutely no good at word problems and need all of the help I can get. I appreciate those of you who are helping others, like myself. So thank you very much!
The perimeter of a rectangle is 44 inches and its area is 112 square inches. Find the the length and width of the rectangle.
I know that 2L+2W=44 and that L*W=112 The rest is a complete blank as to how to achieve L and W.
Click here to see answer by Edwin McCravy(20054)

Question 54275: I have the whole quadratic equation, just want to make sure that I am plugging in the numbers correctly. if I have then, in my quadratic eq a=3,b=6, and c=2, is that correct? From there I should just follow through with the eq ? I am getting -2 sqrt 3 and it just doesn't look right.
Click here to see answer by Earlsdon(6294)

Question 54312: Shondra wants to enclose a rectangular garden with 320 yards of fencing. What dimensions for the garden will maximize its area?
Click here to see answer by aaaaaaaa(138)

Question 54311: If a football is kicked straight up with an initial velocity of 96ft/sec from a height of 5ft, then its height above the earth is a function of a time given by
h(t)=-16t^2+96t+5. What the is the maximum height reached by the ball?
do I use the quad. formula or complete the square and please help me solve this. I'm utterly lost and needs the homeword turned in an hour. Thank you so much in advance!!
Click here to see answer by funmath(2933)

Question 54313: Mona Kalini gives a walking tour of honolulu to one person for $47. To increase her business, she advertised at the national honolulu orthondontist convention that she would lower the price by $1 per person for each additional person, up to 47 people. Write her revenue as a function of the number of people on the tour. What number of people on the tour would maximize her revenue? What is the maximum revenue for her tour?
Click here to see answer by jenrobrody(19)

Question 52884: Find the equation of a quadratic polynomial passing through the following points: (-1,2) (-5,2) and (6,8)?
Click here to see answer by venugopalramana(3286)

Question 54415: -x^2 > or = 9x+14 Please help!! I have to solve and show the solution in interval and algebraic form. I got through most of the problem but need help with the notation, and also want to confirm that I solved it right. -x^2-9x-14 > or = 0 factored is (-x-2)(x+7) so I got x= -2 and x= -7 as test points and by testing the regions on the number line, I found that -1 through +infinity does not work in the original problem. Im not sure where to go from here or how the interval notation should look. Thanks, Angela
Click here to see answer by stanbon(75887)

Question 54429: A lawn(rectangular shape is to have an area of 86M.Forty metres of timber edging is available to complaetely edge the lawn.determine the lawn length and width so that all timber edging is used
Click here to see answer by checkley71(8403)

Question 54621: SOLVE CUBIC EQUATION 15X^3 + 11X^2 - 12X = 0
Click here to see answer by stanbon(75887)

Question 54618: 2x - 7√x - 30 = 0.
Solve by factoring.
Click here to see answer by stanbon(75887)

Question 54620: SOLVE CUBIC EQUATION X^3 + 3X^2 - 28X = 0
Click here to see answer by venugopalramana(3286)

Question 54635: find the maximum(or minimum) of each function, also determine the x-intercepts of each function (if any). express your final answers as decimal number (rounded to 4 decimals if necessary)
a) f(x)=-x^2-4x-2
b) f(x)=-x^2+1x+3
I really dont understand these question, we went over them in class but I want to see them solved a Different way.
Click here to see answer by stanbon(75887)

Question 54643: solve (w-4)^2=8 using the square root property
Click here to see answer by tutorcecilia(2152)

Question 54758: What is the equation of the line having slope 4/7 and passing through the point (-3,1) in standard form?
Click here to see answer by funmath(2933)

Question 54904: *-2x+9=x+1
Click here to see answer by Edwin McCravy(20054)

Question 54927: Maximizing Revenue Suppose that the manufacturer of a gas clothes dryer has found that, when the unit price is p dollars, the revenue R (in $) is
R (p) = -4p^2 + 4000p
What unit price should be established for the dryer to maximize revenue? What is the maximum revenue?
Textbook College Algebra 7th ed. Sullivan. Pearson Prentice Hall
Click here to see answer by rapaljer(4671)

Question 54938: Find the least value of and the corresponding value of x
Click here to see answer by funmath(2933)

Question 54866: Transform the general equation y=ax^2+bx+c to vertex form.
Click here to see answer by funmath(2933)

Question 55027: 1. 16a^4-2a

2. x^4-4x^2+3

Please Help, I am lost. Thanks
Click here to see answer by funmath(2933)

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