A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
A right triangle has base (x  7) units and height (2x  10) units.
Part A: What is the square of the length of the hypotenuse of the triangle? Show your work. (4 points)
Part B: What is the area of the triangle? (3 points)
Part C: Using the solution obtained in Part B, explain the closure property of multiplication of polynomials. (3 points)
anonymous
 one year ago
A right triangle has base (x  7) units and height (2x  10) units. Part A: What is the square of the length of the hypotenuse of the triangle? Show your work. (4 points) Part B: What is the area of the triangle? (3 points) Part C: Using the solution obtained in Part B, explain the closure property of multiplication of polynomials. (3 points)

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@ganeshie8 @Nnesha @hartnn

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@mathmate @welshfella Can you guys help? I have a general idea of what I need to do for part one, but I get really lost afterwards.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1square of hypotenuse , by Pythagoras theorem = sum of squares on the other 2 sides = (x  7^2 + (2x  10)^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I got that much, but I need to simplify it I believe

kobenichan
 one year ago
Best ResponseYou've already chosen the best response.0What do you have that you need to simplify?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I need the square length of the hypotenuse. so wouldn't I need to simplify (x7)^2 + (2x+10)= C^2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Like I know that much but I don't know what to do afterwards. do I square everything?

kobenichan
 one year ago
Best ResponseYou've already chosen the best response.0You need to square (x7) and (2x10) right now. If you have a scientific calculator you can do this easily, but if you have a reg. calculator then do (x7)(x7) and use the distributive property. Then do the same with (2x10)(2x10)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433177251700:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433177275411:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433177299845:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433177325031:dw ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Did I do that part correct?

kobenichan
 one year ago
Best ResponseYou've already chosen the best response.0Yes that's right :) sorry if I'm slow to respond I'm doing my exam

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay, so now I do (2x10)(2x10)?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433177671889:dw Sorry for the bad writing ;;~

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1now had these 2 expansions together x&3  14x + 49 + 4x^2  40x + 100

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1**correction first term is x^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433178085721:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1add like terms eg x^2 + 4x^2 = 5 x^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that the answer? for part A I mean

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1Part B the area = 1/2 * base * height = 1/2 * (x  7) (2x  10)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how do I do that o.O

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1to make it easier 1/2 * (2x  10) = (x  5) now work out (x  7)(x  5) and you gave the required area

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433179051398:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@amistre64 @Here_to_Help15

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@mathstudent55 @paki @Luigi0210

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@welshfella can you please help me

kobenichan
 one year ago
Best ResponseYou've already chosen the best response.0I'm so sorry I got very busy and forgot about your question :( what part are you on?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Part B I believe >.>

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok so Pt. B is asking the area.. what is your understanding of this Q?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0That for the area, you need to do a=1/2*b*h since we already have b and h, we just plug it in. Right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I got that much, but when it comes to trying to find said area, I get completely lost

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[1/2*(2x10)(x7)\] is your equation

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I know that much, but I don't know how to apply the 1/2 to the (x7)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1you've worked it out correctly alice

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so is that trinomial the Area?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0You can either take it's inverse out, but since it's an expression & not an equation, it's like dividing (x7) by 2.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1apply the half to (2x 10) first makes it easier 1/2 * (2x  10 ) = x  5

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1so it comes down to (x 5)(x  7) which you worked out correctly in an earlier post alice

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I did (x5)(x7). Is there no other step afterwards?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Nope. You can check your work by multiplying again, and you should be getting the same answer you started with.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.