Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 216374: A river has a current of 5 mph. It takes Al half an hour longer to paddle upstream 1.2 miles than to paddle downstream the same distance. What is Al's rate in still water?
I started out with:
r=rate
With current=r+5
against current=r-5
but this is as far as I could get
Click here to see answer by Alan3354(69443)   |
Question 216553: A line is described by the equation y = 3 . A parabola is given by the equation Y = x^2 –6x +c What value(s) of c would result in this system of equations having one solution? What value(s) of c would result in two solutions?
Click here to see answer by Alan3354(69443) |
Question 216553: A line is described by the equation y = 3 . A parabola is given by the equation Y = x^2 –6x +c What value(s) of c would result in this system of equations having one solution? What value(s) of c would result in two solutions?
Click here to see answer by Theo(13342)  |
Question 216596: Please anyone tell me if I got this answers right? Thank you so much!!!
x = -5 and 2x2 + 4x -30 = 0
1) x=5
(x-5)(x-5)
x^2 -10x +25
2) 2x^2 +4x -30 = 0
-4 +/- sqrt((4)^2 - 4(2)(-30))
2(2)
-4 +/- sqrt(16 +240)
4
-4 +/- sqrt(256)
4
-4 +/- 16
4
x = 3 x= -5
Click here to see answer by DRichardson(63)  |
Question 217107: I am having difficulty with a question. The problems is as follows: A parabola has an x-intercept at 2, its axis of symmetry is the l ine x=4, and the y-coordinate of its vertex is 6. Determone the equation of the parabola.
I am setting up my equation - y = ax^2 + bx + c and plugging in the numbers as follows: y = 4a^2 + 2b + 8. Am I on the right track?
Thanks,
Lori
Click here to see answer by RAY100(1637) |
Question 217107: I am having difficulty with a question. The problems is as follows: A parabola has an x-intercept at 2, its axis of symmetry is the l ine x=4, and the y-coordinate of its vertex is 6. Determone the equation of the parabola.
I am setting up my equation - y = ax^2 + bx + c and plugging in the numbers as follows: y = 4a^2 + 2b + 8. Am I on the right track?
Thanks,
Lori
Click here to see answer by jsmallt9(3758) |
Question 217107: I am having difficulty with a question. The problems is as follows: A parabola has an x-intercept at 2, its axis of symmetry is the l ine x=4, and the y-coordinate of its vertex is 6. Determone the equation of the parabola.
I am setting up my equation - y = ax^2 + bx + c and plugging in the numbers as follows: y = 4a^2 + 2b + 8. Am I on the right track?
Thanks,
Lori
Click here to see answer by Alan3354(69443) |
Question 217145: I’m really confused with this; please help me solve this problem.
a) Solve x^2+7x-1=0
b) Find the x-intercepts of f(f) =x^2+7x-1
What are the solutions?
X=?
(Type exact answers, using radicals as needed. Use a comma to separate answers as needed)
Click here to see answer by Alan3354(69443) |
Question 216956: I am having difficulty with a question. The question is as follows: A parabola has an x-intercept at 2, its axis of symmetry is the line x=4, and the y-coordinate of its vertex is 6. Determine the equation of the parabola.
I am setting up my problem as y = ax^2 + bx + c and I since x = 4, y must be 0
o = 16 + 4 + c. I'm confused and I don't think I am setting up the equation correctly.
Thanks - Lori
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 218155: the dolphin jumps out the water at a show, the function can be modeled by
f(x)=-16x^2 times 32x, which the x is the time in second. find out what is the max. height, and how long does it take to reach that height, and how long will the dolphine stay in the air before he went back into the water.
Click here to see answer by Alan3354(69443) |
Question 219126: hey iv a freashman and my teacher is makeing us do a sheet a sertain way can u show me all the ways to solve (x-8=0) (6x+5=13) (67=x-65) (x-4=9) (6=x+2) (5b=145) (-4=(2/5a) (7y=28) (m/7=12) im kinda in need of help cuz she wants me to do it in a certain way and if i dont ill get all of them wrong even though i got them right so plz help
Click here to see answer by checkley77(12844) |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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