Homework Help: algebra

Posted by Patrick on Thursday, November 22, 2007 at 10:21pm.

In your post, include the height, the width, and the calculations needed to determine the length of the diagonal of your computer monitor. After you have calculated the approximate length using the Pythagorean theorem, use a measuring device to measure the length of the diagonal of your monitor. Was your measurement close? Why might the measurements not be exactly the same?

Typing hint: Type Pythagorean theorem as a^2 + b^2 = c^2. Do not use special graphs or symbols because they will not appear when pasted to the discussion board.

Part 2: Using the Library, web resources, and/or other materials, find a real-life application of a quadratic function. State the application, give the equation of the quadratic function, and state what the x and y in the application represent. Choose at least two values of x to input into your function and find the corresponding y for each. State, in words, what each x and y means in terms of your real-life application. Please see the following example. Do not use any version of this example in your own post. You may use other variables besides x and y, such as t and S depicted in the following example, but you may not use that example. Be sure to reference all sources using APA style.

Typing hint: To type x-squared, use x^2. Do not use special graphs or symbols because they will not appear when pasted to the Discussion Board.

When thrown into the air from the top of a 50 ft building, a ball’s height, S, at time t can be found by S(t) = -16t^2 + 32t + 50. When t = 1, s = -16(1)^2 + 32(1) + 50 = 66. This implies that after 1 second, the height of the ball is 66 feet. When t = 2, s = -16(2)^2 + 32(2) + 50 = 50. This implies that after 2 seconds, the height of the ball is 50 feet.
my monitor is 13inch by 10inch

algebra - Michael, Thursday, November 22, 2007 at 10:37pm
What exactly do you need help with? We're not just going to do all that for you.
- algebra - Patrick, Thursday, November 22, 2007 at 10:41pm
  figuring out if my monitor is 13inch by 10 half inch. how do i put that into what i'm ask to do?
  - algebra - Michael, Thursday, November 22, 2007 at 10:45pm
    Your monitor is 13" by 10.5", and those are the height and width (a and b in the Pythagorean theorem).
    
    a^2 + b^2 = c^2
    
    Plug in a & b to solve for c.
- algebra - Patrick, Thursday, November 22, 2007 at 11:16pm
  ok thank you know if you could break it down to me where i can do it own my owe that would be great. because, i do not know how to do algebra at all.and i'm taking a college corse it which i have to pass.
  - algebra - Michael, Thursday, November 22, 2007 at 11:34pm
    Sure. I'll give you an example of the Pythagorean Theorem.
    
    We have a triangle with sides of 7 and 12. We need to find the hypotenuse (also called the diagonal).
    
    a^2 + b^2 = c^2
    
    Our sides are always a and b, and our hypotenuse is always c.
    
    7^2 + 12^2 = c^2
    49 + 144 = c^2
    193 = c^2
    
    Square root both sides of this because √(x^2) = x. The square root and the square cancel out.
    
    √193 = √(c^2)
    √193 = c
    13.9 = c
    
    If you have any more questions, let me know.
- algebra - Patrick, Friday, November 23, 2007 at 11:16pm
  this is what I came up with for my monitor is this right or did I do it wrong.
  a^2 + b^2 = c^2
  13*2+10*2 = c^2
  26+20= c^2
  46=c^2
  46=√(c^2)
  6.78= c
algebra - louis l, Sunday, November 22, 2009 at 5:12pm
if a monitor is 16.1 by 16,0 how would you write it in pythagorean theorem

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