Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 159122: These equation has more than 2 solutions.
27x^3-8=0 Help. What do I do since it is a cube not square
Click here to see answer by midwood_trail(310)

Question 159121: x^2/3-x-1/6 -b+-sqr rt of b^2-4ac/ 2a
a=? b=-1 c=-1/6
I am stuck as to what "a" is.
Click here to see answer by Alan3354(69443)

Question 158885: 7/x+2 + 12=8/x-2
Click here to see answer by edjones(8007)

Question 159218: 2x2 = 3y2 + 5 , x - 3 + 5 = 0
Click here to see answer by KnightOwlTutor(293)

Question 159219: 3x2+4y2=19 , x+2=1
Click here to see answer by KnightOwlTutor(293)

Question 159234: y = x+7 , x2 + y2 =29
Click here to see answer by Alan3354(69443)

Question 159246: hey,
could you please solve the following problem for me, and thank you.
Sammy McWire hits a massive pop-up. the height h, in meters, of the ball is
given by h = 1.2+20t-5t^2, where t is in seconds. what is the maximum height
of the ball? if it is caught at the same height at which it was hit. how long
is it in the air?
i will be waiting for the solution,
and thank you again,

Click here to see answer by jim_thompson5910(35256)

Question 158449: (w^2-2w+1) + (2w-5 + w^2)
Thanks
Click here to see answer by jojo14344(1513)

Question 159293: Hi,
i am having trouble finding the answer to this:
The following equations have repeated roots. find the value(s) of the constant p leaving your answer(s) in exact form.
(p-1)x^2 + 6x + (p+7) = 0
i have been trying to figure it out for a while now and i have looked in the text book and the answers are -8 and 2, but i want to know how i can get these answers.
Thanks.
Click here to see answer by jim_thompson5910(35256)

Question 159309: I am stumped on this problem. 3x^2-x-1=0. I am needing to solve it by either quadratic equation or finding the square root. Has to be completely worked out with all steps.
If anyone could help I would appreciate it. This is the last question on my assignment.
Thank you,
Renee

Click here to see answer by jim_thompson5910(35256)

Question 159318: How do u factor a quadratic Equation whos A>0
Click here to see answer by jim_thompson5910(35256)

Question 159348: (2x)x + 5x - 3 = 294
Click here to see answer by jim_thompson5910(35256)

Question 159469: Please help me with 2(x-y)=8 when x=6
I know that the answer is 2 but not sure how they got that.
Click here to see answer by josmiceli(19441)

Question 159469: Please help me with 2(x-y)=8 when x=6
I know that the answer is 2 but not sure how they got that.
Click here to see answer by nerdybill(7384)

Question 159712: I just can't seem to get this. Can you help me solve this equation? Thanks
x/8 +x/12 = -4
Click here to see answer by checkley77(12844)

Question 159642: 5c+12=3c-6
Click here to see answer by checkley77(12844)

Question 159818: f(x)= x^2+6x-4 is the function
The questions are.
a.what is the vertex of the parabola?
b.what is domain and range?
c.find the interval over which the function is increasing?decreasing?
d.approximate the zeros of the function using the calculater?

for a. i got (3,13) is that right?
for b. i got domain(-inf,inf) range [13,inf)
for c. increasing [13,inf) decreasinf (-inf,13]
for d i dont know how to do
Please help!
Click here to see answer by jim_thompson5910(35256)

Question 159847: x=1+4/x
Click here to see answer by checkley77(12844)

Question 159889: radical -4 radical -16

my ans is -2 radical 2 the book says-8
Click here to see answer by jim_thompson5910(35256)

Question 159913: Ok, A retailer spent $48 to purchase a number of special mugs. Two of them were broken in the store, but by selling each of the remaining mugs for $3 above the original cost per mug, she made a total profit of $22. Need to solve for the number of mugs originally purchased? Denoted by n. Having issues wrapping my head around it, would be very thankful for any help. dwr825
Click here to see answer by stanbon(75887)

Question 159948: I'm having trouble with quadratice equations here is a problem that I cannot seem to solve: 9x^2+9x=2=0
Click here to see answer by stanbon(75887)

Question 159906: x^2 + x sqr rt of 2 - 2 = 0
Click here to see answer by Fombitz(32388)

Question 160017: Please help me with this question.
Write a quadratic equation with the given roots. Write the equation in standard form.
-2, -5
Click here to see answer by nerdybill(7384)

Question 160167: Solve the equation by using the Square Root Property.
13.) 16x^2 - 48x + 36 = 49
Click here to see answer by checkley77(12844)

Question 160164: 5x^2=80
Click here to see answer by checkley77(12844)

Question 160236: How do I complete the square for m(x)=-x^2+6x-4?
I tried dividing 6x by 2 and factored out -1 from x^2+6x. But how do you get the other number?
Click here to see answer by checkley77(12844)

Question 160248: how can u solve f(x)=2x2squared-4
Click here to see answer by gonzo(654)

Question 160328: Hi, Can you please help me?
.
Quadratic Equations ( You solve this problem same as quadratic equation)
.
Solve
.
I replaced with "u", and solved like a normal quadratic equation
.
I found out that and
.
since , I found that
.
If we replace the "u" with "4" and (-1), it means and , and
.
I found the answers, but when I looked at the answers in the book, the book only had , why wouldn't , or did the book forget to mention
.
Thanks ahead of time, Levi

Click here to see answer by checkley77(12844)

Question 160331: Hi, Can you please help with applications of quadratic equations
.
(1)
.
Does parabula open up/down?
.
Find vertex
.
Find axis of symmetry
.
(2)
.
Does parabula open up/down?
.
Find vertex
.
Find axis of symmetry
.
Thanks ahead of time, Levi
Click here to see answer by checkley77(12844)

Question 160402: Use the quadratic formula to solve the equation.

Click here to see answer by KnightOwlTutor(293)

Question 160400: Could someone please show me how to get the line of symentry, vertex and the min/max of the line.

Click here to see answer by Earlsdon(6294)

Question 160400: Could someone please show me how to get the line of symentry, vertex and the min/max of the line.

Click here to see answer by scott8148(6628)

Question 160427: How to show that the equation x^2 + px -q^2 = 0 are real for any real numbers p & q? Thanks
Click here to see answer by jim_thompson5910(35256)

Question 160426: How to show that the equation x^2 + px -q^2 = 0 are real for any real numbers p & q? Thanks
Click here to see answer by jim_thompson5910(35256)

Question 160425: How to show that the equation x^2 + px -q^2 = 0 are real for any real numbers p & q? Thanks
Click here to see answer by jim_thompson5910(35256)

Question 160309: The speed of an airplane in still air is 243 mph. The plane travels 663 mi against the wind and 1735 mi with the wind in a total time of 10 hr. What is the speed of the wind?
Click here to see answer by ankor@dixie-net.com(22740)

Question 160560: solve -6/a=54/72
Click here to see answer by stanbon(75887)

Question 160590: Find the trigonometric functions of theta if the terminal side of theta passes through (4,-3).
Click here to see answer by Fombitz(32388)

Question 160814: The speed of an airplane in still air is 168 mph. The plane travels 689 miles against the wind and 950 miles with the wind in a total time of 11 hours. What is the speed of the wind.
I have tried everything with this question and I keep getting the wrong answer. I think I am screwing up distributing.
Click here to see answer by ankor@dixie-net.com(22740)

Question 160792: Please help me solve this problem
Thanking you in advance.
Click here to see answer by ankor@dixie-net.com(22740)

Question 160961: The completion of a certain chemical reaction is expressed by the equation y=250-5x-x^2, where y is the number of seconds needed to complete the reaction and x is the temperature in degrees Celsius at which the reaction occurs. If the reaction is complete in 200 seconds, what is the temperature at which the reaction occurs in degrees Celsius?
Click here to see answer by Earlsdon(6294)

Question 161020: Extreme hardship. Kim starts to walk 3 mi to school at 7:30 A.M. with a temperature of 0�F. Her brother Bryan starts at 7:45 A.M. on his bicycle, traveling 10 mph faster than Kim. If they get to school at the same time, then how fast is each one traveling?
Click here to see answer by ankor@dixie-net.com(22740)

Question 161123: quadratic equation for x2-8x-33=0
Click here to see answer by Specialk562(6)

Question 161241: Use the quadratic formula to solve the equation.
3x^2-36x=72
The answer is going to be 18 + or - the square root of something over 3.
Click here to see answer by KnightOwlTutor(293)

Question 161327: I need help please!!! I can't figure this out at all.
While finding the amount of seed to plant his three suare wheat fields, Hank observed that the side of one field was 1 kilometer longer than the side of the smallest field and that the side of the largest field was 3 kilometers longer than the side of the smallest field. If the total area of the three fields is 38 square kilometers, then what is the area of each field?
Click here to see answer by vleith(2983)

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