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 Question 109478: a professional stunt performer at a theme park dives off a tower 21m high into the water. his height above the ground at time t seconds is given by the equation h=-4.9^1/2+211 how long does it take to reach the water? how long does it take to reach the halfway mark? Click here to see answer by bucky(2189)

 Question 109585: I am supposed to find k in the following quadratic equation: (k+3)x^2 + 2kx + 4 = 0. I have tried using the quadratic formula and unless I'm doing something wrong I don't come up with k. I have tried using the discriminant to find k with no success. I must be missing something easy. Thanks for your help, Don Click here to see answer by jim_thompson5910(28595)
 Question 109585: I am supposed to find k in the following quadratic equation: (k+3)x^2 + 2kx + 4 = 0. I have tried using the quadratic formula and unless I'm doing something wrong I don't come up with k. I have tried using the discriminant to find k with no success. I must be missing something easy. Thanks for your help, Don Click here to see answer by edjones(7569)

 Question 109771: I really need help with this question. The base of an 18-ft ladder is 4 ft away from a wall. How far above the floor is the top of the ladder? Give all answers to the nearest thousandth Click here to see answer by beccadancer15(3)

 Question 109808: Beatrice and javier can paint a room in 5 hours. Working alone, javier can paint the room in 2 hours less time than Beatrice can. Find how long it takes her to paint the room alone. Click here to see answer by edjones(7569)

 Question 109859: I am really confused at the AC concept. Can someone please help? Thanks! Use the ac test to determine if x^2 +2x-15 can be factored. Find the values of m and n if it can be factored. Use the ac test to determine if x^2-3x+7 can be factored. Find the values of m and n if it can be factored. Click here to see answer by stanbon(57347)

 Question 110036: Help! I need help with a couple of problems. 1. Solve the inequality. Give the solution set in interval notation and graph it. x^2-2x-3>0 - 2.Find the real number c such that x^2-2/3x+c is a perfect square trinomial. Click here to see answer by edjones(7569)

 Question 110059: When a group of bushwalkers become lost they decide to launch a distress flare vertically into the air from the top of a cliff. at the t seconds after firing, the height h metres, of the flare above the water was h=-5t2+30t+35 (i) What was the height of the flare above the water at t=0 seconds? (ii) How many seconds after firing did the flare reach its maximum height? (iii) what was the maximun height when the flare was above: (a) the water (b) the top of the cliff Click here to see answer by stanbon(57347)

 Question 110162: Find an equation that has the solutions: x= -4 and 7 select 1 answer below: a.x^2 - 3x - 28 = 0 b.x^2 + 3x = 28 c.x^x - 11x = 28 d.x^2 + 3x + 28 = 0 Click here to see answer by checkley71(8403)

 Question 110328: Is there anyone that can help me with this problem? I have worked almost the entire thing but am comfused toward the end. 1. Find all values of K such that f(x)is divisible bt the given linear poly. f(x) k^2x^3-4kx+3; x-1 This is what I did: f(1)= k^2(1)^3-4k(1)+3 f(1)= k^2-4k+3 (k+1)(k-4) THis factoring isn't working. I have made a mistake somewhere but I can;t tell where. Please help. Thanks Click here to see answer by stanbon(57347)

 Question 110344: I do not understand how I am suppose to solve this. Solve by using the Square Root Property (x-5)^2=7 Click here to see answer by MathLover1(6632)
 Question 110344: I do not understand how I am suppose to solve this. Solve by using the Square Root Property (x-5)^2=7 Click here to see answer by josmiceli(9678)

 Question 110343: I need help with this question. The length of a rectangle is 4cm more that 2 times its width. If the area of the rectangle is 61cm^2, find the dimensions of the rectangle to the nearest thousandth. Click here to see answer by MathLover1(6632)

 Question 110341: I would appreciate any help with this problem. Solve by completing the square 4x^2+2x-3=0 Click here to see answer by josmiceli(9678)

 Question 110339: I could really use help on this question. x^2+x-2=0 Click here to see answer by scott8148(6628)
 Question 110339: I could really use help on this question. x^2+x-2=0 Click here to see answer by jim_thompson5910(28595)

 Question 110446: I am trying to graph a quadratic equation....everything was going fine until I tried to get the points for the left side of the graph....they're all over the place...some go below the vertex and it definatly doesnt look like a parabola. Can someone please explain to me how to get the -points? I tried plugging x into the equation but its not working at all...neither are the x and y intercepts, which I have as y=-4 and x=4 and -1, I'm getting so frustrated. The equation is X²+3x-4 I appreciate anyones help! Bonnie C. Click here to see answer by checkley71(8403)
 Question 110446: I am trying to graph a quadratic equation....everything was going fine until I tried to get the points for the left side of the graph....they're all over the place...some go below the vertex and it definatly doesnt look like a parabola. Can someone please explain to me how to get the -points? I tried plugging x into the equation but its not working at all...neither are the x and y intercepts, which I have as y=-4 and x=4 and -1, I'm getting so frustrated. The equation is X²+3x-4 I appreciate anyones help! Bonnie C. Click here to see answer by solver91311(16885)

 Question 110467: Determine if this equation can be expressed in quadratic form and if so write the equation in quadratic form. x^4+4x-5=0 Click here to see answer by stanbon(57347)

 Question 110469: Determine if this equation can be expressed in quadratic form and if so write the equation in quadratic form. x^4+4x^2 -5=0 Click here to see answer by stanbon(57347)

 Question 110557: Determine whether the function f(x) = -x^2-2x-7 has a maximum or minimum value and find the coordinates of the point. Click here to see answer by HyperBrain(694)

 Question 110475: Determine if this equation can be expressed in quadratic form and if so write the equation in quadratic form. (x-3)^2 -4(x-3)-21=0 Click here to see answer by ankor@dixie-net.com(15652)

 Question 110704: Write the equation of the line with x-intercept (–8, 0) and undefined slope. Click here to see answer by solver91311(16885)

 Question 110709: Write the equation of the line passing through (–5, –6) and (5, –6). Click here to see answer by solver91311(16885)

 Question 110695: Graph each function. First find the Vertex and Axis of Symmetry: 1. f(x)=-x^2+x-1 2. g(x)=2x^2+4x-1 3. y=x^2+10x+25 thank you Click here to see answer by stanbon(57347)

 Question 110771: Can you help with this problem? It's a take home exercise that has me stumped: Solve: 2x2 (2x squared) = 7x + 11 I incorrectly listed this under "Word Problems." Thank you. Click here to see answer by jim_thompson5910(28595)

 Question 110772: Can you help? This take home exercise has me stumped: Write the quadratic equation, given the solution: (3/5, 2/7) Thank you. Click here to see answer by edjones(7569)

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