Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 108784: Use the quadratic formula and explain each step as if you were teaching someone who had never used the method before.
3m^2 + 10m +3 = 0
Click here to see answer by jim_thompson5910(28595)

Question 108812: 2x^2-5x=3 I am having trouble figuring this out.I am suppose to use the quadratic formula
Click here to see answer by MathLover1(6634)

Question 108819: solve using quadratic equation
4x²+7x-15=0
Click here to see answer by stanbon(57377)

Question 108822: factor
3x²-6x+3=0
Click here to see answer by Fombitz(13828)

Question 108822: factor
3x²-6x+3=0
Click here to see answer by MathLover1(6634)

Question 108824: I am having trouble with this equation.
Find x-intercepts
y=x^2+x-6
Click here to see answer by Fombitz(13828)

Question 108755: Solve by completing the square:
x^2 + 6x +1 = 0
Click here to see answer by elima(1433)

Question 108823: Identify the axis of symmetry, create a suitable table of values and sketch the graph(including axis of symmetry). Y=x^2-5x+3

I would appreciate any help on this.

Click here to see answer by stanbon(57377)

Question 108757: Use the quadratic formula to solve the equation
4x^2 - 36x = 48
Click here to see answer by elima(1433)

Question 108835: what is (a^2+a+1)+ (5a^2-8a+20)
Click here to see answer by checkley71(8403)

Question 108734: 3x^2 + 2x = 7

x^2 + 8x+9=-7

Thank You:-)
Click here to see answer by elima(1433)

Question 108951: I need help with this problem:
f(x)=-4x^2+ 4x-1
This is what the problem asks:
a)use the quad formula to find zeros
b)Find Max or min value
c)sketch the graph
This is what I have done so far:
-4+/- sqr rt(4^2-4(-4)(-1))/2(-4)
Note: This should be set up using the quad formula
This is what I came up with:
x= -4+/- sqrt(16-16)/ -8
Note: also set up in quad formula.
My problen is what to to with the 16s. If I subtract them that leaves Zero. I'm stuck here. I can look at the equation and tell it will be a max value but what are the zeros? Please help?

Click here to see answer by bucky(2189)

Question 108990: Use factoring to solve the equation
4x^2 +12x = 0
Click here to see answer by MathLover1(6634)

Question 108992: Use factoring to solve the equation
6z^2 = 60z - 126
Click here to see answer by MathLover1(6634)

Question 108996: Use the square root property to solve the equation
(x-9)^2 = 36
Click here to see answer by jim_thompson5910(28595)

Question 108999: Write the equation in quadratic form and solve by factoring.
x(x-7) + 12 = 0
Click here to see answer by MathLover1(6634)

Question 108995: Can't get this one, any help would be great, thanks.
The length of a rectangle is 5 cm more than 4 times its width. If the area of the rectangle is 76 cm2, find the dimensions of the rectangle to the nearest thousandth.
Click here to see answer by Fombitz(13828)

Question 108988: Solve equation by using factoring.
7x^3 - 28x = 0
Click here to see answer by Fombitz(13828)

Question 109004: A rectangle is 5 feet longer than it is wide, and its area is 66 square feet. Find its dimensions.

Click here to see answer by scott8148(6628)

Question 109059: 3x2 + 2x = 7

x2 + 8x+9=-7

Click here to see answer by stanbon(57377)

Question 109003: According to the 1998 Guinness Book of World Records stuntman Dan Koko fell a distance of 355 feet into an airbag after jumping from the Vegas World Hotel and Casino. The distance d in feet traveled by a freefalling object in t seconds is given by the formula d = 16t 2. To the nearest tenth of a second, how long did the stuntman's freefall last?

Click here to see answer by stanbon(57377)

Question 108997: According to the 1998 Guinness Book of World Records stuntman Dan Koko fell a distance of 355 feet into an airbag after jumping from the Vegas World Hotel and Casino. The distance d in feet traveled by a freefalling object in t seconds is given by the formula d = 16t 2. To the nearest tenth of a second, how long did the stuntman's freefall last?

Click here to see answer by ankor@dixie-net.com(15659)

Question 109002: Use the square root property to solve the equation.
7x^3 - 28 x = 0

Click here to see answer by edjones(7569)

Question 109001: Use the square root property to solve the equation.
x^2=4

Click here to see answer by edjones(7569)

Question 108991: Use factoring to solve the equation
6y^2 + 486 = 0
Click here to see answer by edjones(7569)

Question 108998: A rectangle is 5 feet longer than it is wide, and its area is 66 square feet. Find its dimensions.
Click here to see answer by edjones(7569)

Question 106264: Sorry Wrong question
With the equation does a=8 b=0 and c=9?
Thanks
Click here to see answer by vertciel(183)

Question 109154: 1. Please help me solve by factoring:
x2 – 13x = -12

Click here to see answer by scott8148(6628)

Question 109153: 2. Solve using the square root property:
2x2 – 35 = 15

Click here to see answer by scott8148(6628)

Question 109166: find length and width of area 204 perimeter 58
Click here to see answer by ankor@dixie-net.com(15659)

Question 109226: Hi- this is my problem, that I need help with. State the maxium or minimum value of each quadratic function and name the x-value at which this occurs.
f(x)= -2x^2-6x+5
I don't know where to start, sorry!!!
Thank you in advance for you help.
Click here to see answer by jim_thompson5910(28595)

Question 109149: solve using the square root property
2x^2-35=15
Click here to see answer by HyperBrain(694)

Question 109255: Please help me solve by completing the square, and if you can show me that would be great!
4. Solve by completing the square:
x2 + 6x + 1 = 0

Click here to see answer by stanbon(57377)

Question 109282: 1. 5(x - 2)^2=3
2. Find the x-intercepts. y = x^2 + 3x - 8
3. Find the axis of symmetry. "y = x^2 - 5 + 10"
4. Solve. (x – 3)^2 = 6

Click here to see answer by stanbon(57377)

Question 109284: greatly appreciate your help on this question - thank you
Determine the revenue function: a company has found that if they produce x units of a product, they must sell them each at $10 - 0.2x if they are to sell them all.
would revenue function be R(x) = P*q = (10 - 0.2x)*x
and also, their fixed costs are $40 and their Variable costs per unit are $1 Determine the cost and profit functions
Functions are cost = 1(x) + 40 ?
Profit function = total revenue - total cost
= -0.2x^2 + 9x + 40 ?
Am I at all close?
Click here to see answer by stanbon(57377)

Question 109252: 6.Please help me solve using the quadratic formula:
x2 – 7x – 1 = -7

Click here to see answer by edjones(7569)

Question 109283: 1. Solve by completing the square.
x^2 – 4x + 4 = 0
2. Solve by completing the square.
x^2 = 5x + 2
3. Solve by using the quadratic formula. x^2 = –3x + 8
4. Solve by using the quadratic formula. 3x2 = 11x + 4
5. Solve. (x + 1)2 = 3

Click here to see answer by MathLover1(6634)

Question 109237:
Click here to see answer by anne(47)

Question 109346: The height h in feet of an object after t seconds is given by the function
h = –16t2 + 30t + 8. How long will it take the object to hit the ground? Round your answer to the nearest thousandth.

Thanks in advance
Click here to see answer by checkley71(8403)

Question 109388: Solve: x^2 - 4x - 1=0 by completing the square.
Click here to see answer by jim_thompson5910(28595)

Question 109398: Solve by using quadratic formula:
x^2+4x+2=0
This is what I have, not sure if correct?
x=-4+-square root 4^2-4(1)(2) divided by 2
x=-4+-square root 2 divided by 2
x=2 x=-4
Click here to see answer by jim_thompson5910(28595)

Question 109416: I need help with these two prolems:
Solve:x^4-9x^2+18=0
&
Find k so that 4x^2-kx+1=0 has one rational solution.

Click here to see answer by jim_thompson5910(28595)

Question 109323: one positive integer is 7 less than twice another. the sum of their squares is 346. find the integers
i dont understand how to set this up
Click here to see answer by ankor@dixie-net.com(15659)

Question 109473: A pair of skydivers jump out of an airplane 5.5 km. above the ground. The equation H=5500-5t(square)is an approximate model for divers' altitude in meters at t seconds after jumping out of the plane.
If a parachute does not open at 1000m, how much time is left to use the emergency chute?
Click here to see answer by bucky(2189)

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