Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 133289: solve equation by completing the square
z^2-5z-7=0
Click here to see answer by jim_thompson5910(28476)

Question 133289: solve equation by completing the square
z^2-5z-7=0
Click here to see answer by solver91311(16868)

Question 133290: solve equation by completing the square
3x^2-8x=2
Click here to see answer by vleith(2825)

Question 133324: Rewrite the expression x^3 - 2x^2 y + x y^2 so that it is easy to calculate the its value without a calculator when x= 21 and y = 19
Click here to see answer by jim_thompson5910(28476)

Question 133355: y=-x^2
y=-4x^2
y=-6x^2
Click here to see answer by jim_thompson5910(28476)

Question 133370: Find the value of the discriminant and give the number of real solutions.
2x^2-5x=0
Click here to see answer by jim_thompson5910(28476)

Question 133431: Togethe, John and Mark can finish painting a house in 10 hours. Alone, John takes 4 hours longer than Mark to finish painting the same house. How long does Mark take to finish painting the house by himself?. Give your correct answer to correct 2 decimal places.

Click here to see answer by scott8148(6628)

Question 133462: A chain store manager has been told by the main office that daily profit, P, is related to the number of clerks working that day, x, according to the equation P=-25x^2+300x. What number of clerks will maximize the profit, and what is the maximum possible profit?
Click here to see answer by solver91311(16868)

Question 133461: Find the vertex and intercepts for the parabola g(x)=x^2+x-6 Sketch the graph
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Question 133459: If a pine cone falls from the top of a 96-foot pine tree, how long does it take to reach the ground?
Click here to see answer by scott8148(6628)

Question 133523: I just get confused with problems such as:

y=(1/8)x^2
I need to find the x-intercepts, but I do not know how to put the equation into the form that is needed. I believe it is standard form.
Click here to see answer by checkley71(8403)

Question 133562: How can I find the vertex of f(x)= 2x^2-4x+5? Thank you!
Click here to see answer by checkley71(8403)

Question 133637:
I am thinking of 3 consecutive positive numbers. If I multiply the first with the third and then add the second, the result is 41. What are the numbers?
Click here to see answer by checkley71(8403)

Question 133629:
how do i find the discriminant in the quadratic equation x^2+11x+121=x+96?
Click here to see answer by checkley71(8403)

Question 133644: I have a chapter nine test tomarrow 4/26 and i need help!
ok..it has to do with quadrtatic equations..Vertical motion models: droped and thrown H=-16t squared + s and -16t squared+vt+s
the question is.. A falcon dives toward a pigeon on the ground.
when the falcon is at a height if 100 ft the pigeon sees the falcon. which is diving at a 220 ft per sec. estimate the time the pigeon has to escape.

h= height t= time s= initial height v= initial velocity
for some reason you also have to use the quaratic formlua
-b +- squareroot of b squared - 4 (a)(C) over 2(a)
Click here to see answer by solver91311(16868)

Question 133703: Solve each equation by factoring.
8x=3x^2=5
My Work:
I moved the 8x over and came out with 3x^2-8x+5=0.My teacher taught me to use this box and i did and came up with (3x-5+5)=0+5 and (x-1+1)=0+1 and i divided and came up with x=5/3 and 1. PLEASE HELP I REALLY TRIED!!!
Click here to see answer by jim_thompson5910(28476)

Question 133705: Solve for eacg equation by factoring.
4x^2=12x-9
Click here to see answer by jim_thompson5910(28476)

Question 133706: Solve each equation by factoring.
4m^2+6=11m
Click here to see answer by jim_thompson5910(28476)

Question 133737: am trying to figure out a problem, that I cannot, for the life of me seem to answer by showing my work. The answer is supposed to be either -1&-2 or 3&4.
Here is my question.
The sum of two consecutive integers is 5 less than their product. Find the integers.
I found them, but I cannot show HOW I got them. ??

Click here to see answer by dolly(163)

Question 133795: Hello and thanks for helping me out in advance. This question is on a take home quiz and I"m not sure how to do it. The directions say to find the greatest common factor here is the question
-12ab, 21a^2, 18ab^2, -21b^2
now where i'm having the trouble is there are no common terms. Or at least I can't see any because there are non that have both an a and b or just an a or b I"m assuming 3 and then something after it but I have no clue..I know it's probably an easy answer but I can't seem to come up with it. Thanks
Christina
Click here to see answer by solver91311(16868)

Question 133796: Hi could you help me factor this problem

I keep coming up with crazy answers. Thank you
Click here to see answer by solver91311(16868)

Question 133802: The problem states: Graph each quadratic function. Give the vertex, axis, domain and range.
f(x)=(x+4)^2
From the text book I cannot figure our the formula. I've tried putting in numbers for x and solving for f. I've also tried using the quadratic equation function on this site. A detailed explanation would be appreciated.
Click here to see answer by scott8148(6628)

Question 133836: y=2x-6
Graph the equation and identify the y intercept.
Can someone help me with this please, I do not understand this at all.I do not understand how I come with number for the X what do i do to get that number??
Click here to see answer by Earlsdon(6287)

Question 133837: y+x=-2
Graph equation and idenify the y intercept.
Click here to see answer by checkley71(8403)

Question 133868: Ok i have to solve for x in this equation:
x^2 + (x+7)^2 = 13^2
this is my work but its wrong:
2x^2 + 49 = 169
2x^2 - 120 = 0
square root of (0- 4*-120*2) over 4
please help
Click here to see answer by edjones(7569)

Question 133900: 4 over x = 3 over x squared + 5
LCD= x^2
a=5 b=-4 c=3
0=5x^2-4x+5
Total answer i got= 4 plus minus square root -44 over 10
is this right???? are they both no solution?
Click here to see answer by edjones(7569)

Question 134016: use the square root method to find solutions for the equation
(3x-2)^2=-9
Click here to see answer by checkley71(8403)

Question 134016: use the square root method to find solutions for the equation
(3x-2)^2=-9
Click here to see answer by snwbrdfrk(10)

Question 134016: use the square root method to find solutions for the equation
(3x-2)^2=-9
Click here to see answer by Earlsdon(6287)

Question 134020: Owachomo Natural Bridge is found in Natural Bridges National Monument in Utah. If the origin is located at one end of the natural arch, the curve can be modelled by the equation.
h = -0.043d sqaured + 2.365d
where h metres is the height of the arch, and d metres is the horizontal distance from the origin.
a) What is the maximum height of the arch, to the nearest hundredth of a metre?
b) What is the width of the arch at the base?

Click here to see answer by solver91311(16868)

Question 134025: The formula for the height, h metres, of an object propelled into the air is
h = -1/2g t squared ( only the t is squared) + vt + h
where g represents the acceleration due to gravity, which is about 9.8 m/s squared on the Earch. t seconds represents the time, v metres oer secibd reoresents the initial velocity of 34.3 m/s and is launched 2.1 m above the ground.
a) What is the maximum height, in metres, reached by the projectile?
b) How many seconds after launch does the projective reach its maximum height?
Click here to see answer by scott8148(6628)

Question 134062: I got the answer to the maximum height o the arch but I am unable to find the width of the arch at he base, could I please get help with that? Thanks in advance.
Owachomo Natural Bridge is found in Natural Bridges National Monument in Utah. If the origin is located at one end of the natural arch, the curve can be modelled by the equation.h = -0.043d sqaured + 2.365dwhere h metres is the height of the arch, and d metres is the horizontal distance from the origin.a) What is the maximum height of the arch, to the nearest hundredth of a metre?b) What is the width of the arch at the base?
Click here to see answer by vleith(2825)

Question 134075: solve the equation by completing the square
x^2+6x+2=0
Click here to see answer by solver91311(16868)

Question 134090: PLEASE HELP ME! THIS IS DUE TOMARROW! PLEASE HELP
A triangle has a height of 4 inches more than two times its base and the area of the triangle is 168 find the base
Click here to see answer by solver91311(16868)

Question 134103: please help me with a C program source code that works out the roots a quadratic equation in the form
Click here to see answer by solver91311(16868)

Question 134115: Complete the ordered pair (,4) so that it is a solution of x+2y=9.
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Question 134112: Explain why a^2+b^2 cannot be factored.
Click here to see answer by solver91311(16868)

Question 134116: Suppose y varies directly as x and that y=21 when x=3. Find the value of y when x=5.
Click here to see answer by jojo14344(1512)

Question 134114: Bill is paid hourly. If he works 8 hours he will receive $50. Write an equation for his salary based on the number of hours he works. Explain what you did to gewt your answer.
Click here to see answer by jojo14344(1512)

Question 134122: a picture frame measures 34cm by 17cm. There is a 318cm^2 of picture showing. The frame is uniform thickness. Find the thickness of thr frame.
Click here to see answer by ptaylor(2048)

Question 134273: Can I help with this please.
Graph the equation and identify the y-intercept
x+3y=12
Click here to see answer by jim_thompson5910(28476)

Question 134273: Can I help with this please.
Graph the equation and identify the y-intercept
x+3y=12
Click here to see answer by MathLover1(6618)

Question 134274: How do you solve the following quadratic equation: x^2 - 49 = 0
Click here to see answer by jim_thompson5910(28476)

Question 134274: How do you solve the following quadratic equation: x^2 - 49 = 0
Click here to see answer by josmiceli(9654)

Question 134278: Solve then graph.
x+9>3

Click here to see answer by jim_thompson5910(28476)

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