Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 173214: What is the standard form of the quadratic function y=(x-4)�-11
Click here to see answer by Mathtut(3670)

Question 173223: Use the quadratic formula to solve 2x�+11x-4
Click here to see answer by sofiyacherni(99)

Question 173222: Use completing the square to solve x�+8x-11=0
Click here to see answer by jim_thompson5910(35256)

Question 173216: What are all the solutions of 4x�+3x-8=3x�+2
Click here to see answer by jim_thompson5910(35256)

Question 171822: True or false: The function "f(x) = 3x" grows three times faster than the function "g(x) = x". Explain
Click here to see answer by Alan3354(69443)

Question 173297: The distance an object falls is directly proportional to the square of the time it has been falling. After 6 seconds it has fallen 1296 feet. How long will it take to fall 2304?
Click here to see answer by Alan3354(69443)

Question 173310: How would I solve for (x+8)^2 -7= -12
since you can't have the square root of a negetive number?
Click here to see answer by jim_thompson5910(35256)

Question 173323: Is this trinomial a perfect square?
x� - 6x - 9
Please show work as to how it is or isn't. I asked this question last week but work wasn't shown. I need it explained to me so I can understand. PLEASE HELP!!
Click here to see answer by solver91311(24713)

Question 173348: I have a word problem but I am stuck.
the current in a stream moves at a speed of 3mph. A boat travels 45 mi upstream and 45 mi downstream in a total time of 8 hours. What is the speed of the boat in still water?
45/r-3 + 45/r+3 = 8
45(r+3) + 45(r-3)= 8(r+3)(r-3)
90r = 8r^2 - 72
and I'm stuck
Click here to see answer by jim_thompson5910(35256)

Question 173354: this algebra stuff is so confusing to me. I have a word problem that I don't know how to set up and solve.
The length of a rectangle is approximately 1.6 times the width. Find the dimensions of the rectangle is its are is 9000m^2
Click here to see answer by jim_thompson5910(35256)

Question 173359: Find the axis of symmetry.
y = x� - x + 5
Click here to see answer by jim_thompson5910(35256)

Question 173359: Find the axis of symmetry.
y = x� - x + 5
Click here to see answer by stanbon(75887)

Question 173360: This is about graphing quadratic equations and finding the ordered pairs for the vertex and the y-intercept. If anyone can explain this to me it would sure help.
y = x^2 + x - 2
Click here to see answer by jim_thompson5910(35256)

Question 173400: The equation has roots and , and the equation has roots and . find the value of and of .
Click here to see answer by Edwin McCravy(20054)

Question 173417: Solve for the specified variable
S = a/1 - r for r
Click here to see answer by stanbon(75887)

Question 173416: Solve. Round results to the nearest thousandth.
7x^2 - 6x - .4255 = 0
Click here to see answer by stanbon(75887)

Question 173415: Try factoring first. If factoring is not possible or is difficult, use the quadratic formula.
2x^2 + 8x = -1
Click here to see answer by stanbon(75887)

Question 173414: Round to the nearest tenth, if necessary. A rock falls from a tower that is 432 feet high. As it is falling, its height is given by the formula h = 432 - 16t^2. How many seconds will it take for the rock to hit the ground (h=0)?
Click here to see answer by stanbon(75887)

Question 173413: Solve the equation by completing the square
p2 + 3p - 9 = 0
Click here to see answer by nerdybill(7384)

Question 173413: Solve the equation by completing the square
p2 + 3p - 9 = 0
Click here to see answer by KnightOwlTutor(293)

Question 173410: Solve the equation
x(x-3) = 40
Click here to see answer by KnightOwlTutor(293)

Question 173409: Solve the equation
15r^2 = 3r
Click here to see answer by KnightOwlTutor(293)

Question 173408: Write standard form and identify a, b, and c.
4x^2 + 4 = 2x + 3
Click here to see answer by KnightOwlTutor(293)

Question 173412: Express radicals in simplest form.
x^2 + 3 = 52
Click here to see answer by tutorcecilia(2152)

Question 173411: A polygon has 35 diagonals. How many sides does it have?
Click here to see answer by Mathtut(3670)

Question 173411: A polygon has 35 diagonals. How many sides does it have?
Click here to see answer by stanbon(75887)

Question 173481: im having problems with my hwk...we did this along time ago and i just dont remember. i want to know how to find a quadratic equation from a table
Click here to see answer by solver91311(24713)

Question 173531: 5(4-2x)=10x+15
Click here to see answer by Mathtut(3670)

Question 173543: Can someone please help me find the x-intercepts?? I keep getting confused and space.
y = x� + 5x + 1
Click here to see answer by jim_thompson5910(35256)

Question 173547: find a quadratic model for the set of values (-2,-15),(0,-3),(4,-27)
Click here to see answer by Mathtut(3670)

Question 172321: Find the perfect square trinomial whose first two terms are q^2 + 7q
Please help if possible, I am stuck
Click here to see answer by checkley77(12844)

Question 173565: Given that (alpha) is the root of the equation x^2= 2x-1, show that:
(a) (alpha)^3= 3(alpha) -2 ,
(b) (alpha)^4-(alpha)^2= 2(alpha)-2
Click here to see answer by solver91311(24713)

Question 173618: Solve the formula for the specified variable.
v = sqrt (2gE/m), for g
Click here to see answer by nerdybill(7384)

Question 173629: Find the x-intercepts.
y = x^2 + 4
Click here to see answer by vleith(2983)

Question 173630: Find the x-intercepts.
y = x^2 - 4x - 32
Click here to see answer by vleith(2983)

Question 173630: Find the x-intercepts.
y = x^2 - 4x - 32
Click here to see answer by jojo14344(1513)

Question 173628: Graph the equation.
y = x^2 - 2x + 1
Click here to see answer by vleith(2983)

Question 173627: Find the ordered pair for the vertex
y = 2x^2 - 4x + 6
Click here to see answer by jojo14344(1513)

Question 173620: Graph the equation.
y = x^2 - 5
Click here to see answer by jojo14344(1513)

Question 173617: Solve. Round results to the nearest thousandth.
x^2 + 8x - 33 = 0
Click here to see answer by jojo14344(1513)

Question 173626: Tom Quig traveled 280 miles east of St. Louis. For most of the trip he averaged 60 mph, but for one period of time he was slowed to 10 mph due to a major accident. If the total time of travel was 8 hours, how many miles did he drive at the reduced speed?
Click here to see answer by nerdybill(7384)

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