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Tutors Answer Your Questions about Rational-functions (FREE)
Question 30030: One of the largest radio telescopes has a diameter of 250 feet and a focal langth of 50 feet. If the cross section of the radio telescope is a parabola, find the depth.
Is there an equation for this? If not, how the heck would you do this?
Click here to see answer by kev82(145)   |
Question 30029: A searchlight reflector is designed so that a crass section through its axis is a parabola and the light source is at the focus. Find the focus if the reflector is 3 feet across the opening and 1 foot deep.
Where do I even start?!? I'm so lost!
Click here to see answer by AnlytcPhil(958) |
Question 30824: Hello my name im renny 17 i have two math problems to ask u about! Here arem my problems (rational functions)
2y-1/4y = 4/6 (solving rational func)
t^3 - t^2 - 4 / t^2 + t -2 (simplify rational expressions)
Thankyou so much for looking at these problems!!
Click here to see answer by Nate(3495) |
Question 30988: a rocket is launched from atop a 32-foot cliff with an initial velocity of 154 ft/s.
a.write an equation to describe the height of the rocket T seconds after launch
b.graph the equation to find out how long after the rocket is launched it will hit the ground.
c.estimate your answer to the nearest tenth of a second
Click here to see answer by venugopalramana(3286)  |
Question 31377: I need to do this problem and cannot get how to do it. I need the vertical asymptotes, the horizontal asymptotes and the x and y-intercepts. The problem is f(x)=(x-3)/(x+2). I have to make the graph to go with it and have been reading the chapter over and over again and getting more confused.
Click here to see answer by josmiceli(3012) |
Question 31388This question is from textbook College Algebra
: I'm trying to find solutions to this equation:
Sq Root of (11-x^2) - 2 / sq root of (11-x^2) = 1
I tried rationalizing the denominator and squaring the left hand side but I'm left with x^2-8=0. My solution set comes out to x= +/- 2 times the sq root of 2 which I know cannot be.
Thanks for all your help!This question is from textbook College Algebra
Click here to see answer by venugopalramana(3286) |
Question 31390This question is from textbook College Algebra
: Hi again,
I have an equation with a radical inside a radical inside a radical equal to another radical (I'm writing it in exponential form):
(1+(x+(2x+1)^1/2)^1/2)^1/2 = (5+(x)^1/2)^1/2
I tried to square both sides but got lost on the right side after squaring boths sides for the second time coming out with x-3=-x^1/2 after squaring the third time to remove the -x^1/2 remaining on the left side.
Does this equation actually have solutions?
Thank you for all your wonderful help!This question is from textbook College Algebra
Click here to see answer by venugopalramana(3286) |
Question 31621: Question:
Find the vertex, focus, and directrix of the grph of the equation
16(y+7)=(x+1)^2
(A) vertex (1,-7) focus (-1,11) directrix is y=-5
(B) vertex (-1,-7) focus (-1,-3) directrix is y=-11
(C) vertex (1,-7) focus (1,-3) directrix is y=-3
(D) vertex (-1,-7) focus (1,11) directris is y=3
Thank you in advance for your help!
Click here to see answer by mukhopadhyay(490) |
Question 32046: I am stuck on factoring. I need to factor the negative of the greatest common factor -2b + 16
The next couple that are giving me trouble are factoring
9a^8 b^8 c^4 - 18d^6
225x^2k - 196y^2k
a^2 - b^2 + 6a - 6b
any help you can give me is greatly appreciate
Click here to see answer by joey_quizan(15) |
Question 32382: I missed the day that we went over this and my teacher didnt teach it to me well, so im wondering how to figure...
The variable z varies jointly with x and y.
a)write an equation relationg z, x, and y.
b) if x=2, y=1/8, z=3 then find z when x=3&y=-4
If you can just give me an explanation of how to figure this out, that'd be great (do i use z=k(xy)?) If you explain some basics on this subject, i should figure it out. Thanks
Click here to see answer by venugopalramana(3286) |
Question 32533: 1.square root of x^3power=8 (simplify) (I try to do this I think it is =2)
2.exponent3 square root x^2= 4
3.for the equation x -square root x= 0 solve the value of x that satisfied the equation.
Click here to see answer by ikdeep(182) |
Question 32487: I am supposed to find the product with the assumption that the denominator is not 0.
m(n-squared) . 4
__________ ____
3 . mn
I got 4n over 3 for an answer, but this doesn't seem right as I think I should have a variable on the bottom. It would help to know if my answer is correct so I'll know if I'm on the right track.
Thank you for your help.
Click here to see answer by mukhopadhyay(490) |
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