A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
A rectangle has sides measuring (2x + 7) units and (5x + 9) units.
Part A: What is the expression that represents the area of the rectangle? Show your work to receive full credit. (4 points)
Part B: What are the degree and classification of the expression obtained in Part A? (3 points)
Part C: How does Part A demonstrate the closure property for polynomials? (3 points)
Can someone help me?
anonymous
 one year ago
A rectangle has sides measuring (2x + 7) units and (5x + 9) units. Part A: What is the expression that represents the area of the rectangle? Show your work to receive full credit. (4 points) Part B: What are the degree and classification of the expression obtained in Part A? (3 points) Part C: How does Part A demonstrate the closure property for polynomials? (3 points) Can someone help me?

This Question is Closed

phi
 one year ago
Best ResponseYou've already chosen the best response.2what is the formula for the area of a rectangle?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0its length times the width so so assuming (2x + 7) is the length and (5x + 9) is the width, the expression would be A=(2x + 7)(5x + 9)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i got that for part A

phi
 one year ago
Best ResponseYou've already chosen the best response.2they probably want you to expand it (FOIL if you learned that)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ive never learned that,no

phi
 one year ago
Best ResponseYou've already chosen the best response.2did you learn how to multiply two binomials ?

phi
 one year ago
Best ResponseYou've already chosen the best response.2FOIL is to remember First 2x*5x Outer 2x*9 Inner 7*5x Last 7*9 or 10x^2 + 18x+35x+63 and finally 10x^2 +53x+63

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yea thats what i got

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that part of Part A?

phi
 one year ago
Best ResponseYou've already chosen the best response.2yes, that is part A. (They want you to show your work... I assume you did)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yay i got part a, so can you help with part B?

phi
 one year ago
Best ResponseYou've already chosen the best response.2Degree is the biggest exponent classification is polynomial

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so first degree binomial?

phi
 one year ago
Best ResponseYou've already chosen the best response.2\[ 10x^2 +53x+63 \] what is the biggest exponent (little number in the upper right)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i was looking at the the problem, not the solution for A=(2x + 7)(5x + 9) =10x^2 +53x+63

phi
 one year ago
Best ResponseYou've already chosen the best response.2yes. all the suffices bi, tri, quad are Latin for 2, 3, 4 It helps to know your Latin FYI, the expression (2x + 7)(5x + 9) even if not multiplied out, is 2nd degree (or "quadratic" )

phi
 one year ago
Best ResponseYou've already chosen the best response.2though we could not really call it trinomial if it's not multiplied out.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so what do we call it

phi
 one year ago
Best ResponseYou've already chosen the best response.2part C is the same answer as the other problem, except use multiply instead of add or subtract.

phi
 one year ago
Best ResponseYou've already chosen the best response.2You posted the answers: 2nd degree, trinomial

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so for part c its (10x^2)(53x)(63) ?

phi
 one year ago
Best ResponseYou've already chosen the best response.2for part B, you might want to also call it quadratic (just in case that is what they are expecting) for part C, the idea is if you multiply two polynomials, the answer will be a polynomial in part A, you do that, and the answer was a polynomial

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do i put that for part c?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok thankyou! Can you check my answers from the other question??

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Side 1: 3x2 − 4x − 1 Side 2: 4x − x2 + 5 The perimeter of the triangle is 5x3 − 2x2 + 3x − 8. Part A: What is the total length of the two sides, 1 and 2, of the triangle? (4 points) Part B: What is the length of the third side of the triangle? (4 points) Part C: Do the answers for Part A and Part B show that the polynomials are closed under addition and subtraction? Justify your answer. (2 points) Part A: The total length is 3x^2x^2,which makes 2x^2+4 Part B: 412=8 Part C:Part a and b both started with polynomials, and had a polynomial as an answer. So its showing that polynomials are closed under subtraction/addition.

phi
 one year ago
Best ResponseYou've already chosen the best response.2Part A you say ***The total length is 3x^2x^2*** that leaves out quite a bit. if you add two polynomials, you have to put in the entire polynomial , not just the cute terms you like

phi
 one year ago
Best ResponseYou've already chosen the best response.23x2 − 4x − 1 + 4x − x2 + 5

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so do i say "3x2 − 4x − 1+4x − x2 + 5=3x^2x^2" ??

phi
 one year ago
Best ResponseYou've already chosen the best response.2the left side is good. the right side should be the "simplified" version for example you have 3 x^2 terms take away 1 x^2 term I would combine those to get just 2x^2 (not "3x^2x^2" because that is not simplified) then do 4x + 4x (easy I hope?!) then do 1+5

phi
 one year ago
Best ResponseYou've already chosen the best response.2yes. You had the correct answer, but how you got the answer looked dubious.

phi
 one year ago
Best ResponseYou've already chosen the best response.2Part B I thought we did this. perimeter  (two sides) = 3rd side you should be showing polynomial (perimeter)  polynomial (from part A) = polynomial (answer)

phi
 one year ago
Best ResponseYou've already chosen the best response.2You got the answer in the other post.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ill look back at it brb

anonymous
 one year ago
Best ResponseYou've already chosen the best response.03x2−4x−1+4x−x2+5=2x^2+4 ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no wait thats A 5x3−4x2+3x−12 ?

phi
 one year ago
Best ResponseYou've already chosen the best response.2first write down the polynomial for the perimeter then minus sign then (in parens) the polynomial from part A

phi
 one year ago
Best ResponseYou've already chosen the best response.2then = and finally the answer 5x3−4x2+3x−12

anonymous
 one year ago
Best ResponseYou've already chosen the best response.05x3 − 2x2 + 3x − 8(2x^2+4)= 5x3−4x2+3x−12?

phi
 one year ago
Best ResponseYou've already chosen the best response.2good job. But if concentrate , it would go faster. We had to do that question twice.
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.