Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 381299: A 60 foot by 80 foot rectangular walk in a park surrounds a flower bed. If the walk is of uniform width and its area is equal to the area of the flower bed, how wide is the walk? Set up a quadratic equation, factor, and solve.
Click here to see answer by mananth(12270)

Question 381454: i need your help to this problem. can you help me?here's the prob.
A man is at a point A on the bank of a straight river. he can row in a still water at a rate which is 20 per cent faster than he can walk. if he rows downstream to a point B, which is 4 mi. below A and on the same side of the river, and then walks, in a direction which is perpendicular to the river, to a point C, 3mi. from B, it takes him the same amount of time that it thus to walk straight from A to c. if he walks back from C to B and then rows upstream to A, the return trip takes him an hour and 36min. longer. find his rate of walking, his rate of rowing in still water, and the rate of the current of the river.
Click here to see answer by mananth(12270)

Question 381570: what is
xsquared-4x+4x
Click here to see answer by user_dude2008(1861)

Question 381626: What is the value or values of n in the equation 2n2-7n+6=0
Click here to see answer by ewatrrr(10682)

Question 381630: What are the values of r in the equation r2-7r-8=0
Click here to see answer by ewatrrr(10682)

Question 381625: What is the value or values in the equation p2+13p-30=0
Click here to see answer by ewatrrr(10682)

Question 381641: Please Help,
Use the chain rule of partial differentiation to find df/dt in terms of t where f(x, y) = e^(2x-3y) and x = t^2,
y = 1/t.
Check the result by direct substitution for x and y in f(x, y), followed by ordinary differentiation with respect
to t.
Hence show that when t = 1, df/dt = 7/e.
Thank You

Click here to see answer by Fombitz(13828)

Question 381757: How do you solve 2(x+1)^2=3x+7 using the quadratic equation??
Click here to see answer by stanbon(57967)

Question 381773: Solve
5x^2+8=-12x
Click here to see answer by ewatrrr(10682)

Question 382093: Could you explain step by step how to solve this using the quadratic formula
(1/4)x^2+17/4=2x
Click here to see answer by richard1234(5390)

Question 382103: What is the solution of 12x^2-3x-1=0
gbergpmp@gmail.com
Click here to see answer by richard1234(5390)

Question 382105: What is the solution (1/2x)-(1/(3x+1)=2
Click here to see answer by unlockmath(1614)

Question 382436: What is the value of z in the quadriatic equation z2-4z+4=0
Click here to see answer by solver91311(17077)

Question 382443: The width of a rectangle is 3 inches less than its length. The area of the rectangle is 340 square inches. What are the length and width of the rectangle?
Click here to see answer by solver91311(17077)

Question 382467: Use the quadratic formula to solve the equation x^2-5x=-7
Click here to see answer by solver91311(17077)

Question 382465: For the following equation, state the value of the discriminant and then describe the nature of the solutions. 13x^2+4x+20=0
What is the value of the discriminant? one real solution, two imaginary solutions, two real solutions?
Click here to see answer by solver91311(17077)

Question 382523: Hello,
My instructions were to "Graph the quadratic function. Label the vertex and axis of symmetry. "
However, i dont understand this problem:

I tried using the -b/2a formula , and i got the answer 3.
Then i made a t-chart, to get other points to make my parabola, but the numbers were very off, (one of my 'y' coordinates came out to 32) . I dont think i did it right, and im not good at algebra what so ever, so i am absolutely positive i got it all wrong.
Thank you in advance,
Jackie
Click here to see answer by scott8148(6628)

Question 382612: My question asked for me to find b² - 4ac and the real number solution for the given equation
-x² + 8x – 15 = 0

Click here to see answer by robertb(4012)

Question 382592: I need help solving
√-x + 7 = x - 1

Click here to see answer by mananth(12270)

Question 382623: write the quadratic equation with a lead coefficient of 1 whose roots are 3 and 2
Click here to see answer by robertb(4012)

Question 382653: I need help with finding all intercepts for the graph of the quadratic function
f(x) = 5x² - 38x + 21
Click here to see answer by kingme18(98)

Question 382662: my book is asking me if in a complex number system, any quadratic equation has one or two solution? is this fact true,i am not sure?
Click here to see answer by solver91311(17077)

Question 382662: my book is asking me if in a complex number system, any quadratic equation has one or two solution? is this fact true,i am not sure?
Click here to see answer by rfer(12730)

Question 382680: My question is if two numbers have the sum of 6 can be represented by x and x +6. this problem do not seem to be a true statement What are your thoughts?
Click here to see answer by kingme18(98)

Question 382699: to solve 2x - x^2 = 0 by the quadratic formula, let a =-1, b =2, and c = 0, is his true.
Click here to see answer by kingme18(98)

Question 382685: Hi, If a =2, b =-3, and c = -4, then b^2 - 4ac = 41, is this right?
Click here to see answer by Alan3354(31530)

Question 382735: The sum of the squares of two consecutive integers is 244. Find the two integers.
Click here to see answer by rfadrogane(214)

Question 382775: Solve: 8/(x+2)+8/(x-2)=3
Click here to see answer by robertb(4012)

Question 382773: Solve by factoring and using the principle of zero products:
2x^2-11x+15=0

Click here to see answer by robertb(4012)

Question 382771: Solve: 33x^2=-11x
Click here to see answer by robertb(4012)

Question 382776: Solve by completing the square: x^2- 4x-11=0
Click here to see answer by edjones(7569)

Question 382869: I need help facoring this problem: x-2/x2-9+x+1/x2-x-12
Click here to see answer by Fombitz(13828)

Question 382983: The lengthy of a rectangular garden is 2 yd greater than the width. The area is 80 yd squared. Find the length and width.
Click here to see answer by stanbon(57967)

Question 382982: Please help me solve this problem: 9x^2-7x=3
Click here to see answer by edjones(7569)

Question 383221: Hi, Please can somebody help with this,
The base radius r cm of a right-circular cone increases at 2 cm s^-1 and its height h cm at 3 cm s^-1. Show that the rate of increase in its volume V = 1/3 pi r^2h when r = 5 and h = 15 is 125 pi cm^3 s^-1.
Thank You
Click here to see answer by richard1234(5390)

Question 383196: Solve for T:
Click here to see answer by Alan3354(31530)

Question 383279: An object is dropped from the top of a tower.The formula s=4.9t∧2 gives the distance in meters(s) that the object falls in T seconds.How many seconds will it take the object to fall 122.5 m?
Click here to see answer by mananth(12270)

Question 383325: five times a number decreased by 6 is equal to the number squared? what is the number?
Click here to see answer by mananth(12270)

Question 383343: 5(x+2)^2=-125
Click here to see answer by stanbon(57967)

Question 383369: Can you determine the possible number of real solutions x^2-5x+40=0?
Click here to see answer by richard1234(5390)

Question 383453: The area of a triangle is given by the equation h²+4h= 192, where h is the height of the triangle. What is the height of the triangle? How do you solve this? Step by step please
Click here to see answer by mananth(12270)

Question 383468: x2-3x+2=0 Tell if the equation has two solutions,one solution, or no real solution.
-3x2 + 5x - 1 = 0
6x2 - 2x + 4 = 0

Click here to see answer by mananth(12270)

Question 383653: How do you find the vertex of a parabola??
Click here to see answer by Fombitz(13828)

Question 383662: Divide
4/4+i
Click here to see answer by Alan3354(31530)

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