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help_people
 one year ago
Can you check if this is right?
help_people
 one year ago
Can you check if this is right?

This Question is Closed

help_people
 one year ago
Best ResponseYou've already chosen the best response.1The lengths of two sides of a triangle are shown below: Side 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? Part B: What is the length of the third side of the triangle? Part C: Do the answers for Part A and Part B show that the polynomials are closed under addition and subtraction? Justify your answer.

help_people
 one year ago
Best ResponseYou've already chosen the best response.1Part A: To get the total length of the two sides you ahem to add them together: 3x^2  4x 1 x^2+4x+5  2x^2+4 Part B: To find the length of the third side of the triangle you will add the perimeter and the total length of the two sides together: 5x^3  2x^2 + 3x 8 (2x^2 +4)  5x^3  4x^2 + 3x 12

help_people
 one year ago
Best ResponseYou've already chosen the best response.1idk what they're asking for in pt c?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1perimeter = side 1 + side 2 + side 3 so side 3 = perimeter  (side 1 + side 2)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1lets first correct the answer of part B :)

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1To find the length of the third side of the triangle you will subtract the total length of the two sides from the perimeter

help_people
 one year ago
Best ResponseYou've already chosen the best response.1woat so part b is wrong?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1the words in part B are incorrect, the answer is correct, because you indeed subtracted the answer from part A. just replace the description in your part B.  Part B: To find the length of the third side of the triangle you will subtract the total length of the two sides from the perimeter. 5x^3  2x^2 + 3x 8 (2x^2 +4)  5x^3  4x^2 + 3x 12

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1Part C: Polynomials are closed under addition if you get a polynomial by adding polynomials. Did you get a polynomial answer for part A? Polynomials are closed under subtraction if you get a polynomial by subtracting polynomials. Did you get a polynomial answer for part B?

help_people
 one year ago
Best ResponseYou've already chosen the best response.1yes and yes right?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1good! since we get a polynomial after adding and subtracting polynomials, we can conclude, that the polynomials are closed under addition and subtraction.

help_people
 one year ago
Best ResponseYou've already chosen the best response.1thank you! may you check 2 more?
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