Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 1069442: Please find the Vertex, min/max, x-int, and y-int of y=-3x^2+20x-12
Click here to see answer by Alan3354(69443)

Question 1069463: solve both exact and approximate answers:
20x = ens
Click here to see answer by Fombitz(32388)

Question 1069462: Which table of values could be generated by the equation 4y−2x=164y−2x=16?

Click here to see answer by Alan3354(69443)

Question 1069781: H(t)=t^2-8t-48
Find after how many seconds the ball will touch the ground
Click here to see answer by Alan3354(69443)

Question 1069788: Sally can paint a room in 7 hours while it takes Steve 9 hours to paint the same room. How long would it take them to paint the room if they worked together?
Click here to see answer by josgarithmetic(39613)

Question 1069787: If three times a number, added to 4 is divided by the number plus 5, the result is eight thirds. Find the number
Click here to see answer by Fombitz(32388)

Question 1069797: Sally can paint a room in 7 hours while it takes Steve 9 hours to paint the same room. How long would it take them to paint the room if they worked together?
Click here to see answer by Boreal(15235)

Question 1069790: A plane flies 435 miles with the wind and 375 miles against the wind in the same length of time. If the speed of the wind is 10 mph, find the speed of the plane in still air.
Click here to see answer by Boreal(15235)

Question 1069808: Simplify the complex fraction using Method 2.
9/3r-1 -9
------ =
9/3r-1 +9
Click here to see answer by Fombitz(32388)

Question 1069801: A picture frame is 20 cm by 12 cm. There are 84 cm^2 of picture showing. Find the width of the area not covered by the picture, assuming the picture is the same shape as the frame and is centered on the frame.
Click here to see answer by ankor@dixie-net.com(22740)

Question 1069784: Rewrite the rational expression as an equivalent rational expression with the given denominator.
5a+6/7a-49=?/7b(a-7)

Click here to see answer by Theo(13342)

Question 1069970: So i have to find the area of a shape or something. And the measurements on my home work are Length= 3x-1 and Width= 2x-1 and Height=2
Click here to see answer by Alan3354(69443)

Question 1070125: Which equation shows quadratic function f (X) = x2 -8x-6 in vertex form
Click here to see answer by Fombitz(32388)

Question 1070156: If 4xsquared - 100 = 0 what are the roots of the equation
Click here to see answer by Fombitz(32388)

Question 1070156: If 4xsquared - 100 = 0 what are the roots of the equation
Click here to see answer by MathTherapy(10549)

Question 1070481: Find the vertex of the parabola whose equation is y=3/4(x-8)+6
Click here to see answer by josgarithmetic(39613)

Question 1070482: Find the vertex of the parabola whose equation is y=-5/3(x+9)-15
Click here to see answer by josgarithmetic(39613)

Question 1070483: write the equation in both vertex form and standard form for a parabola that has a vertex of (-3,-2) and passes through 1,0)
Click here to see answer by josgarithmetic(39613)

Question 1070523: Find the solution set of the equation x +y = 7 and 3x� +2y� = 59
thank you
Click here to see answer by Alan3354(69443)

Question 1070720: please put A(x+6)^2+7 in standard form
Click here to see answer by Fombitz(32388)

Question 1070730: Y=X^2-5x+7
Y=5x-18
Click here to see answer by Fombitz(32388)

Question 1070798: Complete the square
v^2+2v-28=-4
Click here to see answer by Alan3354(69443)

Question 1070798: Complete the square
v^2+2v-28=-4
Click here to see answer by ikleyn(52754)

Question 1070890: How do you find the fixed perimeter of a parabola
Click here to see answer by Alan3354(69443)

Question 1070996: How do I solve the following for d?
2d squared x 2 -10 d squared -4d+3
------------------- = --------------------
d squared + 7d+10 d squared + 2d -15

Where/how do I begin?
Click here to see answer by Alan3354(69443)

Question 1071073: find K so that one zero of the polynomial 2kx^2-20x+21 =0 exceeds the other by 2

Click here to see answer by josgarithmetic(39613)

Question 1071089: f(x)=-3(x+4)^2-6 in vertex form, the axis of symmetry and the domain and range
Click here to see answer by Fombitz(32388)

Question 1071001: Determine if f(x)equals=6 minus 2 x plus 4 x squared6−2x+4x2 is linear, quadratic, or neither. Identify the leading coefficient, and evaluate f(minus−2

Click here to see answer by t0hierry(194)

Question 1071181: find the discriminant. how many real solutions does the equation have? -4x^2-4=8x
Click here to see answer by josgarithmetic(39613)

Question 1071181: find the discriminant. how many real solutions does the equation have? -4x^2-4=8x
Click here to see answer by MathTherapy(10549)

Question 1071190: Which of these expressions always represents a negative value? Which of these expressions always represents a positive value?
x -x -(x+y) |x|
Click here to see answer by josmiceli(19441)

Question 1071189: You can model an arch at your school using the equation y=−0.9(x+3)(x−3)y=−0.9(x+3)(x−3), where xx and yy are measured in feet. The x-axis represents the ground. Find the width of the arch at ground level.
The width of the arch at ground level is
feet.

Click here to see answer by josmiceli(19441)

Question 1071205: a dog pen has an area of 60 square feet the width of the pendants two feet shorter than the left find the length of the pen?
Click here to see answer by Dirichlet(3)

Question 1071330: Find the inverse of the following functions:
f(x) = -3� + 2
f(x) = 5x + 3
f(x) = (x-3)^2 + 2, 3_< x.
Click here to see answer by josgarithmetic(39613)

Question 1071329: The fixed costs of producing a good are 9
and the variable costs are 4 + 3Q per unit.
Find expressions for TC & AC. Evaluate TC & AC
when Q = 5 and Q= 10. Sketch the graph of AC as
a function of Q.
Click here to see answer by addingup(3677)

Question 1071333: Evaluate (a) log3 9
(b) log4 2
(c) log7 (1/7)
Click here to see answer by Alan3354(69443)

Question 1071331: Sketch the functions y = 2x and Y = 3x
on the same graph for -2 _< x _< 2
Click here to see answer by Boreal(15235)

Question 1071398: A vacant lot is being converted into a community garden. The garden and the walkway around its perimeter have an area of 460 ft2. Find the width of the walkway if the garden is 12 ft wide by 15 ft long.
Click here to see answer by ikleyn(52754)

Question 1071396: A vacant lot is being converted into a community garden. The garden and the walkway around its perimeter have an area of 460 ft2. Find the width of the walkway if the garden is 12 ft wide by 15 ft long.
Click here to see answer by ikleyn(52754)

Question 1071397: The cost function for a certain company is
C = 50x + 600
and the revenue is given by
R = 100x − 0.5x^2.
Recall that profit is revenue minus cost. Set up a quadratic equation and find two values of x (production level) that will create a profit of $600.
Click here to see answer by Theo(13342)

Question 1071431: Use the table of values that represent points on the graph of a quadratic function. By determining the vertex and axis of symmetry, find the general form of the equation of the quadratic function. y=

x −2 −1 0 1 2
y 1 0 1 4 9

Click here to see answer by josgarithmetic(39613)

Question 1071430: Sketch a graph of the quadratic function.
f(x) = x^2 − 2x − 1
Give the vertex, axis of symmetry, and intercepts. (If an answer does not exist, enter DNE.)
Click here to see answer by josgarithmetic(39613)

Question 1071429: Use the vertex (h, k)
and a point on the graph (x, y)
to find the general form of the equation of the quadratic function.
(h, k) = (−5, −1), (x, y) = (−7, 3)
Click here to see answer by josgarithmetic(39613)

Question 1071424: Sketch a graph of the quadratic function.
f(x) = x^2 - 4x
Give the vertex, axis of symmetry, and intercepts. (If an answer does not exist, enter DNE.)
Click here to see answer by josgarithmetic(39613)

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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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23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240