Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 1675: Question regarding quadradic equations in intermediate algebra:
Determine the dimensions of a rectangle with a perimeter of 20 that encloses the greatest area. The perimeter is the sum of all sides of the rectangle. Is there another shape that would be more efficient (higher area to perimeter ratio?)
Click here to see answer by khwang(438)  |
Question 1672: 2-part question on quadratic equations in intermediate algebra:
A quadratic equaation can have zero, one or two solutions (zeroes) in the study of quadratic formulas and the discriminant.
1. What about an equation of order 3 like: ax^3+bx^2+cx+d=0
2. What is the minimum number of solutions or zeroes? What is the maximum? Can
there be two?
Click here to see answer by khwang(438) |
Question 1711: Quadratic_Equations/1699: Using the quadratic formula for x in the equation 2x^2=11x-9 results in which of the following values:
A. -9/2 or 1
B. 9/2 or -1
C. 9/2 or 1
D. -9/2 or -1
Thanks for any help you can give me on this question!!
1 solutions
Answer 553 by smartdude17(3) on 2005-05-07 13:43:30:
When you do all the work, it comes to the answer C. 9/2 and 1. That means you got it right!!!!!!!!!!
Can someone show me how you derive the answer to this question. I need to know how to figure this out as well. (Guess I should have said that...lol)
Click here to see answer by smartdude17(30) |
Question 1671: I have no clue how to do this. I am working on quadratic functions and their graphs in intermediate algebra. This is one question with three parts:
A. Write the function y=3(x-2)^2+6 in the form of Y=ax^2 +bx+c, and find the
vertex of the parabola using the formula x=-b/2a
B. Repeat part (a) with the functions y=-4((x-5)^2-9 and y=3(x+2)^2-6.
C. What is the vertex for a parabola that is written in the form y=a(x-h)^2+k?
Explain your answer.
Click here to see answer by smartdude17(30) |
Question 1671: I have no clue how to do this. I am working on quadratic functions and their graphs in intermediate algebra. This is one question with three parts:
A. Write the function y=3(x-2)^2+6 in the form of Y=ax^2 +bx+c, and find the
vertex of the parabola using the formula x=-b/2a
B. Repeat part (a) with the functions y=-4((x-5)^2-9 and y=3(x+2)^2-6.
C. What is the vertex for a parabola that is written in the form y=a(x-h)^2+k?
Explain your answer.
Click here to see answer by longjonsilver(2297)  |
Question 1760: I need to come up with the general equation of a quadratic function for the following word problem. Can you help me get started please?
A large awning is being designed for a hotel entrance and drive. The roof is to be a section of a parabola, with the vertex attached to the hotel wall 16 feet abve the ground, and supported by 10 foot wall posts that are 12 feet away from the hotel wall.
Come up with a general eqaution of a quadratic function that would model the roof of the awning.
Thanks for ANY help. I'm completely stuck on how to go about this problem algebraically.
Noelle
marknoni@comcast.net
Click here to see answer by longjonsilver(2297) |
Question 1752: a) Jim is going to put new carpet in his bedroom. Jim's bedroom is 10ft. by 12ft. How many square feet of carpet does he need?
b)Jim also needs some new base bored to go around the room. How much does he need?
Click here to see answer by xen0gears(3) |
Question 1916: Lucy tosses a ball up to Carry, waiting at a third-story window, with an initial velocity of 30 feet per second. She releases the ball from a height of 6 feet. The equation h=-16t^2+30t+6 represents the height, h, of the ball after t seconds. If the ball must reach a height of 25 feet for Carry to catch it, does the ball reach Carry? Explain.
(Hint: Substitute 25 for h and use the discriminant.)
Click here to see answer by longjonsilver(2297) |
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