Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 384666: Given the quadratic function f(x)=x^2 - 6x + 9 find a value of x such that
f(x)= 25
Click here to see answer by richard1234(7193)

Question 384665: Joshua and Geraldine can finish cleaning the house in 2 hours. If it takes Joshua working alone 3 hours longer than it takes Geraldine working alone, how many hours will each need to finish the work alone?
Click here to see answer by mananth(16946)

Question 384690: Solve for T: Q= √(aT/c)
Click here to see answer by mananth(16946)

Question 384690: Solve for T: Q= √(aT/c)
Click here to see answer by edjones(8007)

Question 384709:
Click here to see answer by mananth(16946)

Question 384703:
Click here to see answer by Fombitz(32388)

Question 384761: Solve for x: 8x^3 - 125 = 0

Click here to see answer by ewatrrr(24785)

Question 384795: A ball is thrown straight up into the air. The approximate height h of the ball after t seconds can be appromimately modeled by the function h=-16t^2+55t.What is the maximum height that the ball reaches?
Click here to see answer by stanbon(75887)

Question 384820: factor 28x^2-23x-15 into factors with integer coefficients, if posible.
Click here to see answer by scott8148(6628)

Question 384812: for the equation 25x^2 - kx = -4, find k so that the equation has exactly one rational root.
Click here to see answer by scott8148(6628)

Question 384886: Hi Please help.
Partial differentiate the following, the d's are the 'curly' d's but couldnt get them on here Find df/dx, df/dy, d^2f=dx^2 and d^2f/dy^2 for f(x, y) = e^(x+y).sin(x - y).
Thank You
Click here to see answer by richard1234(7193)

Question 385173: Getting lost in completing the square for 2x^2+5x+11=0
I am able to get to 2x^2+5x=-11 then do I divide everything by 2? That would give me a really complicated fraction of x^2+5x/2=-11/2 then I am lost...
Melody
Click here to see answer by stanbon(75887)

Question 385217: i'm learning polynomials and such in class and a question came up in one of my group tests. i asked someone else for help and they showed me how to do it but i don't get how to get from the equation to the answer.
i do not understand how 2w^2+11w=84 gets to whatever the weird answer was. i do not understand how it is a quadratic equation and how to simplify it...please help and thanks so much.
PS. the problem i had on my group test was this:
The length of a picture is one inch less than twice its width. the frame around the picture has a uniform width of two inches and an area of 96 square inches. what are the dimensions of the picture?
i did the equation like this:
(2w+3)(w+4)=96
which simplified to:
2w^2+11w=84
Click here to see answer by stanbon(75887)

Question 385197: A central angle intercepts an arc of a circle equal in length to a diameter of the circle, find the measure of the central triangle in radians.
Click here to see answer by Edwin McCravy(20054)

Question 385186: I am very confused on this problem
The Danville Express travels 280 miles at a certain speed. If the speed had been increased by 5mph the trip could have been made in 1 hour less time find actual speed
Click here to see answer by scott8148(6628)

Question 385331: (x+3)(2x-1)(x-0.5)=0
Click here to see answer by stanbon(75887)

Question 385330: (x+3)(2x-1)(X-0.5)+0
Click here to see answer by stanbon(75887)

Question 385519: x^2+9x-12=0
x^2=9x=12
4x^2+36x=12x4
4x^2+36x=48
4x^2+36x+6=48+6

and this is where i get completely confused...i don't even know if I've done the problem right thus far. your suggestions please???
Click here to see answer by stanbon(75887)

Question 385549: help me solve (2x-1)(x-4)=39
Click here to see answer by ewatrrr(24785)

Question 385640: How do i break this problem down step by step to solve for x and to solve for y? 5x-2y=10
Click here to see answer by solver91311(24713)

Question 385671: Twelve less than the square root of a number is the same as 4 times the number. Find the number
Click here to see answer by stanbon(75887)

Question 385546: Hi
Please can someone help
10. If u = ax + by and v = bx - ay, a and b constants, obtain du/dx and dv/dy. By expressing x and y in
terms of u and v, obtain dx/du and dy/dv and deduce that
du/dx.dx/du = a^2/a^2+b^2 and dv/dy.dy/dv = a^2/a2+b2
Thank you very much
Click here to see answer by richard1234(7193)

Question 385827: Solve using the quadratic formula and round your answers to the nearest tenth:
3x^2+4x-2=0

Click here to see answer by mananth(16946)

Question 385853: Find the length of the third side of the right triangle. Assume that c represents the length of the hypotenuse.
b=12, c=15
Click here to see answer by mananth(16946)

Question 385897: write an equation in the form ax^2+bx+c=0 given one root of 5+i
Click here to see answer by robertb(5830)

Question 386074: how do i solve (3x-2)(x-1)=14
Click here to see answer by ewatrrr(24785)

Question 386208: darren can travel 380 miles on 14.2 gallons of gas. how many gallons would he need to travel 500 milies? round to nearest tenth
Click here to see answer by rfer(16322)

Question 386221: how do you solve :
1-2(e-1)=-3-4(3-5)
the answer should be e=7
but i'm just not getting it.
Can you explain step by step please

Click here to see answer by scott8148(6628)

Question 386221: how do you solve :
1-2(e-1)=-3-4(3-5)
the answer should be e=7
but i'm just not getting it.
Can you explain step by step please

Click here to see answer by solver91311(24713)

Question 386261: solve for x in simplest a+bi from x^2+8x+25=0

Click here to see answer by scott8148(6628)

Question 306416: 3d=18-3d d=6
Click here to see answer by fluffy78(1)

Question 386434: Help me simplify: 3(-5-3)+4(7-9)/5(-2)-3(-4)
Click here to see answer by mananth(16946)

Question 386417: please help me slove this question f(x)=x^2+7
i got this but i dont know what to do from here -7+ or - the square root of 85 over 2
Click here to see answer by Alan3354(69443)

Question 386561: how do you graph y=3xsquared - 6x + 7

Click here to see answer by ewatrrr(24785)

Question 386561: how do you graph y=3xsquared - 6x + 7

Click here to see answer by solver91311(24713)

Question 386549: 2gh+v^2=constant
Click here to see answer by Fombitz(32388)

Question 386761: ALGEBRA 1
write in standard from: y+2=4/3(x+6)
Click here to see answer by rfer(16322)

Question 386810: The perimeter of a rectangle is 30m. The length of the rectangle is 3m more than twice the width. Find the dimensions of the rectangle.
Click here to see answer by richard1234(7193)

Question 386809: The perimeter of a rectangle is 98m. The length of the rectangle is 9m more than four times the width. Find the dimensions of the rectangle.
Click here to see answer by richard1234(7193)

Question 386909: solve for F.
Click here to see answer by Alan3354(69443)

Question 386964: how to solve a general solution to a quadratic equation like x power 2 negative 5x+7=0 and thank u
Click here to see answer by mananth(16946)

Question 386970: The width of a rectangle is 3cm less than its length. The rectangle has area of 40cm^2. What is the length of the rectangle?
Please help Im not very good at word problems!!
Click here to see answer by stanbon(75887)

Question 386890: Solve the formula for the specified variable.
Ve=1/2mv^2 solve for v
Click here to see answer by Fombitz(32388)

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