Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 322897: The path of a basketball shot can be modeled by the equation h = -0.09d² + 0.9d + 2 where h is the height of the basketball, in metres, and d is the horizontal distance of the ball from the player, in meters.
How far from the floor is the ball when the player releases it?
Click here to see answer by jessica43(140)

Question 322967: Express using a positive exponent.
k^-4
Simplify using a Positive Exponent.
Thanks!!
Click here to see answer by jessica43(140)

Question 322982: Use the quadratic formula to solve the equation.
2x^2 - 5x = -9
Type a solution set using radicals as needed. Express complex terms in terms of i. Use integers of fractions for any numbers in the expression. Use comma to separate answers.
Thank you so much!!!
Click here to see answer by stanbon(57323)

Question 322979: Solve.
Square root of 9x + 55 = x + 5
Simplify and use comma to separate answers as needed.
Thank you so much!!!
Click here to see answer by solver91311(16877)

Question 322964: Multiply
(r + 1/4)(r + 1/3)
Simplify.
Thanks!!
Click here to see answer by solver91311(16877)

Question 322976: Factor Completely
36s^2 - 121 =
Type N if it is not factorable.
Thanks!!
Click here to see answer by QH(50)

Question 322981: Rewrite with a rational exponent.
6 SQRT of 20
Simplify
Thank you so much!!!
Click here to see answer by QH(50)

Question 323004: x^2-20X=10, can we solve this by completing the square?

Click here to see answer by Fombitz(13828)

Question 323065: how to solve this equation x2( to the second power) - 2x - 13=0
Click here to see answer by Fombitz(13828)

Question 323085: How do you know when an equation has infinitely many solutions?
Click here to see answer by Fombitz(13828)

Question 322477: I am still struggling with this topic. How would I create a quadratic equation with given solutions 9 and 16?
Click here to see answer by problemsolver(1)

Question 323152: 13-x/2=x-1/2
13+1/2=x+x/2
27/2=3x/2
(27/2) x (2/3)=x
9=x
Click here to see answer by solution(1)

Question 323158: One root of the equation 2x^3 – 5x^2 – 8x + d = 0 is the negative of another. Compute d.
(A) –10 (B) –4 (C) 8 (D) 20 (E) 24
Click here to see answer by Jk22(389)

Question 323191: Solve.
(x+15)(x-10)(x+5)> 0
Is there no solution?
Is it all real numbers?
Use at least one inequality or compound inequality
Click here to see answer by stanbon(57323)

Question 323184: Rationalize the denominator. Assume that all expressions under radicals represent positive numbers.
SQRT of x - SQRT of y / SQRT of x + SQRT of y
Simplify and use radicals as needed
Click here to see answer by QH(50)

Question 323274: Hi, I am having a real hard time trying to figure out this equation. I can not seem to find any kind of example that comes close enough to help me. I have a test tomorrow and this is an example of what the test is about. Here is the equation.
What are the solutions? Give exact and approximate solutions to three decimal places.
x^2 - 5x + 3 = 0
Click here to see answer by jim_thompson5910(28593)

Question 323297: Use the method of completing the square to find the standard form of the quadratic function. State the vertex and exis of symmetry of the graph of the function.
f(x)=x^2+8x+9
help please
cz
Click here to see answer by stanbon(57323)

Question 323398: Hi. I was doing some homework and I came across this question.
x(x+2)(x+7)=24
The directions were to solve for x. And I would really like to know how.
Click here to see answer by Alan3354(30993)

Question 323464: The length of a rectangle is twice the width. The area is 338 yd^2. find the length and the width
Click here to see answer by checkley77(12569)

Question 323571: how do you find the coordinates of the y-intercept?
Click here to see answer by jim_thompson5910(28593)

Question 323595: A rectangle has length ( x + 11) in width 2x in . the perimeter of the rectangle is at least 47 inches and at most 52 inches .find the greatest value of x that satisfies the condition
Click here to see answer by JBarnum(2044)

Question 323606: 4x^2 - 12x - 11 = 0
Click here to see answer by JBarnum(2044)

Question 323605: x^2 + 3/5x - 1/12 = 0
Click here to see answer by JBarnum(2044)

Question 323600: The area of a restangular poster is 1400 square centimeters. If the width of the poster is 5 centimeters less than its height, find the dimensions of the poster.
Click here to see answer by JBarnum(2044)

Question 323603: ( x + 4 )^2 = - 108
Click here to see answer by JBarnum(2044)

Question 323614: 40w^3-30w^2+5w
Click here to see answer by Alan3354(30993)

Question 323614: 40w^3-30w^2+5w
Click here to see answer by mananth(12270)

Question 323602: x^4 - 5x^2 - 36 = 0
Click here to see answer by Fombitz(13828)

Question 323500: an someone please help me with this :
Determine a symmetrical pair of points , calculate the coordinates of the vertex and sketch the graph.
y=x^2-6x+10
And please include the formula used to figure each answer.
Thank you.
Click here to see answer by Fombitz(13828)

Question 323621: give exact and approximate solutions to three decimal place
(x+2)^2=9
Click here to see answer by Fombitz(13828)

Question 323630: solve for x
x^2+12x+4=0
Click here to see answer by JBarnum(2044)

Question 323632: give exact and approximate solutions to three decimal places
x^2+14x+49=25
Click here to see answer by JBarnum(2044)

Question 323628: give exact and approximate solutions to three decimals place
x^2+5x-3=0
Click here to see answer by JBarnum(2044)

Question 323634: find the vertex, the line of symmetry, the max or min value of the quadratic function
f(x)=x^2-2x-3
Click here to see answer by nerdybill(6958)

Question 323678: 0.19= X^2^/(0.63-x)

get into quadratic equation and step by step how to???
Click here to see answer by JBarnum(2044)

Question 323622: f(x)=-3(x+1)^2
The vertex is (ordered pair)
the equation of the line of symmetry is x=
Click here to see answer by Fombitz(13828)

Question 323624: f(x)= (x+5)^2-2
The vertex is (ordered pair)
the min value is f(x) =
Click here to see answer by Fombitz(13828)

Question 323717: type an ordered pair. type an exact answer using radicals as needed. Rationalizeall denominators. Express complex numbers in terms of i. Use a comma to separate answers as needed.)
Solve by completing the square
x^2+3/2x=3
Click here to see answer by Fombitz(13828)

Question 323196: Multiply.
(w + d)(w^2 - wd + d^2)
Simplify.
Thanks.
Click here to see answer by Fombitz(13828)

Question 322858: elimination
2x-3y=1
3x-2y+6=o
Click here to see answer by Fombitz(13828)

Question 323631: Find the vertex, the line of symmetry, the maximum or min value of the quadratic function.
f(x)=4x^2-16x+19
Click here to see answer by Fombitz(13828)

Question 323719: Solve 3x^2-7x-11=0
Find the x intercepts of f(x)=3x^2-7x-11
Click here to see answer by checkley77(12569)

Question 322870: why can't different quadratic equations have the same solution?
Click here to see answer by Edwin McCravy(8908)

Question 323982: 7-7x=(3x+2)(x-1)
Click here to see answer by Fombitz(13828)

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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7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 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