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Question 843938: Please help~
If the equation kx^2+2x+28=k-x^2-6kx has equal roots, show that k=-9/10 or 3.
I tried substituting those numbers in but that didn't work out
Thank you.
Click here to see answer by ankor@dixie-net.com(22740)

Question 844266: 2x^2-5x=9
Click here to see answer by richwmiller(17219)

Question 839416: how would you solve this word problem?
Bob has a garden that is 9 feet long by 6 feet wide. He wants to increase each dimension of the garden by the same amount and have the area of the new garden be 5 times the area of the present garden. What should the new dimensions be?
Click here to see answer by richwmiller(17219)

Question 844676: how would you solve this problem and show work i'm trying to understand the concept, i have a test coming up soon.thank you
Three novice sailors were attempting to sail to Cancun mexico from fl during the Christmas break when a storm overtook them. the most composed of the sailors fired a shot with the flare gun straight up into the air hoping against hope that someone would see the distress signal. The height H of the flare, in meters above the "ground", t seconds after firing, can be modeled by the function: H(t)=-4.9t^2+166t+2.2
based on the height model, is it likely the sailor was sitting or standing in the raft when he fired the flare gun? How do you know?
give the height from which the flare was fired in meters?
give the maximum height reached by the flare?
How long did it take for the flare to reach the maximum height?
how long was the flare in the air?
Click here to see answer by Alan3354(69443)

Question 844693: The length of a rectangle is 11 more than twice the width, and the area of the rectangle is 63m^(2) . Find the dimensions of the rectangle
Click here to see answer by ewatrrr(24785)

Question 844857: Given that f(x)=x^2+3x and g(x)=5x+3, solve f(x)=g(x). Graph each function and label the points of intersection.
Click here to see answer by josgarithmetic(39613)

Question 844947: Determine whether f(x)= -2x^2+12x+3 has a minimum or maximum value. Then find the minimum or maximum value.
Click here to see answer by Fombitz(32388)

Question 845134: How do you solve 2x^2-8=0 using the quadratic formula?
Click here to see answer by josmiceli(19441)

Question 845157: Please help me solve this equation.
A herd of deer is introduced onto a small island. At first the herd increases rapidly, but eventually food resources dwindle and the population declines. It can be shown by means of calculus that the rate R (in deer per year) at which the deer population changes at time t is given by R = −4t3 + 26t.
(a) When does the population cease to grow? (Round your answer to two decimal places.)
after t = years
(b) Determine the positive values of t for which R > 0. (Enter your answer using interval notation.)
Click here to see answer by josmiceli(19441)

Question 845176: Hello could you please help me work out this word sum:2 engineers build robots for a company. Engineer A builds 10 robots in 6 hours while Engineer B builds 10 robots in 4 hours how long will it take them to build 10 robots it they work together
Click here to see answer by josmiceli(19441)

Question 845169: Consider the following function.
f(x) = 6x2 + 7x − 24
(a) Use the quadratic formula to find the zeros of f. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.)
x = Correct: Your answer is correct.
(b) Find the maximum or minimum value of f(x). (Round your answer to two decimal places.
Click here to see answer by pmesler(52)

Question 845307: My textbook for Algebra asks for us to "Solve the equation" but our teacher didn't go over this and I'm confused. The problem in question is am I supposed to use the quadratic formula for this? Thanks for your trouble!
Click here to see answer by KMST(5328)

Question 845330: Quadratic function in standard form whose graph passes though the given points.
(1,-2) (-2,1) (3,6)
I know it plugs into the equation ax^2+bx+c
but i have no idea how to plug them in.
Click here to see answer by stanbon(75887)

Question 845355: 3=-7m^2+11m+11
Solve
Click here to see answer by stanbon(75887)

Question 845755: If a and c are both positive, what can be said about the graph of y=ax^2+bx-c?
Click here to see answer by jim_thompson5910(35256)

Question 846009: I am doing application problems for quadratic functions. How do I find dimensions for shapes?

Click here to see answer by ewatrrr(24785)

Question 846032: I am working on Quadratic Equations, and the question I am having trouble with is this:
SOLVE EACH EQUATION. CHECK YOUR SOLUTION.

Click here to see answer by ewatrrr(24785)

Question 846042: I am having trouble with a question on Quadratic Equations. It says:
SOLVE EACH EQUATION BY COMPLETING THE SQUARE

My answers are;
x= 1, -11
p= 6, 2
r= 3, -5
The grading system says they are wrong, but it does make make mistakes sometimes.
Click here to see answer by psbhowmick(878)

Question 846047: What's the next step in solving the equation
x^2+14x-4=30
after you add 4 to each side?

Click here to see answer by ewatrrr(24785)

Question 846051: The volume in cubic feet of a box can be expressed as (𝑥) = 𝑥3 − 6𝑥2 + 8𝑥 , or as the product of three linear factors with integer coefficients. The width of the box is 2 � x.
Factor the polynomial to find linear expressions for the height and the length
Click here to see answer by Fombitz(32388)

Question 846098: A rectangular auditorium seats 1092 people. The number of seats in each row exceeds the number of rows by 11
Click here to see answer by stanbon(75887)

Question 846227: solve by the quadratic formula: 3x^2-6x+9=0
Click here to see answer by ewatrrr(24785)

Question 846245: p(x)=x^4+kx^2+9
what are all the possible values of k? what are the real roots?
Click here to see answer by stanbon(75887)

Question 846313: -2x^2+8x+4
Click here to see answer by Alan3354(69443)

Question 846315: 2y^2-6y+4
Click here to see answer by Alan3354(69443)

Question 846547: I AM STUCK WITH THIS ONE AND IT IS MOST OFTEN ASKED SO PLEASE HELP ME !! 2 ( x-1 / x+3 ) -7 ( x+3 / x-1 ) = 5
Click here to see answer by Fombitz(32388)

Question 846547: I AM STUCK WITH THIS ONE AND IT IS MOST OFTEN ASKED SO PLEASE HELP ME !! 2 ( x-1 / x+3 ) -7 ( x+3 / x-1 ) = 5
Click here to see answer by josh_jordan(263)

Question 839409: An archer�s arrow follows a parabolic path. The height of the arrow f(x) is given by f(x)= -16x^2 + 200x + 4 in feet. Find the maximum height of the arrow.
Click here to see answer by boss805503(1)

Question 846783: 3(x-4)^2+5=20
Click here to see answer by jim_thompson5910(35256)

Question 846843: Trying to understand how
n^2+5n+100-[(n-1)^2+5(n-1)+100]= 2n+4
Need to see steps to understand please
Many thanks to you!
Click here to see answer by josgarithmetic(39613)

Question 846818: What would an equation be to model the hight of a rocket being launched straight up into the air, from the ground at 128ft/s
Click here to see answer by ankor@dixie-net.com(22740)

Question 846997: X^4+x^2+1=0
Click here to see answer by lambo(6)

Question 846997: X^4+x^2+1=0
Click here to see answer by josh_jordan(263)

Question 847122: The height in feet for a ball thrown upward at 48 feet per second is given by s(t) = -16t^2 + 48t, where t is the time in seconds after the all is tossed. What is the maximum height that the ball will reach?
What is the method of the quadratic formula used to solve this problem?
Click here to see answer by josmiceli(19441)

Question 847204: calculate for which value(s) of k the equetion (x^2+2x-11)�2(x-3)=k will have no real roots. (8)

Click here to see answer by swincher4391(1107)

Question 847452: please find solution for a car travels a distance 400 km & consumes x km per liter of fuel the driver get engine serviced the same car then travels a distance of 400 km but the fuel consumption is (x+5) km per liter now what is the x means?
Click here to see answer by josmiceli(19441)

Question 847477: Find the possible values of d if real solutions exist for x� + 5x - 1
- d(x�+1) = 0
Click here to see answer by swincher4391(1107)

Question 847515: Rs 6500 is divided equally among certain number of person.had been there 15 more persons,each would have got Rs30 less.find the original number of person.
Click here to see answer by swincher4391(1107)

Question 847675: Y=x2-6x+6

Click here to see answer by Alan3354(69443)

Question 847721: Solve the equation.(2x-1)^2/3=x^1/3. I'm really not sure how to do this problem, I've gotten an answer of 1, but 1^2/3=1^1/3 is false..I'm confused.
Click here to see answer by Fombitz(32388)

Question 847911: 2-8x =5x^2
Click here to see answer by Fombitz(32388)

Question 848102: Sighting the top of a building, a surveyor measured the angle of a elevation to be 60 degrees. The measurement is taken 200 feet from the building find the building's height. Express your answer in terms of and then round to two decimal places.
Click here to see answer by stanbon(75887)

Question 848165: H= -16t^2 + 48. What is the height at 0 seconds

Click here to see answer by Alan3354(69443)

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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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, 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