Introduction to Polynomials

Question 1

Find each sum.(3n2 – 5n + 6) + (–8n2 – 3n – 2) =

Revolt · Accepted Answer

–5n2 – 8n + 4

Question 2

(–4c2 + 7cd + 8d) + (–3d + 8c2 + 4cd) = c2 + ⇒ 11 cd + ⇒ 5 d

Revolt · Accepted Answer

Part 1: 4

Question 3

(5a2 + 4ab – 3b2) – (–5ab + 4b2 + 3a2) = a2 + ⇒ 9 ab + ( ⇒ -7 b2)

Revolt · Accepted Answer

Part 1: 2

Question 4

Which expression represents the length, in inches, of the framed picture?

Revolt · Accepted Answer

2x + 10

Question 5

Which expression represents the width of the framed picture?

Revolt · Accepted Answer

2x + 8

Question 6

What is the perimeter of the framed picture in terms of x? ( x + ) inches

Revolt · Accepted Answer

Part 1: 8; Part 2: 36

Question 7

At the same time, Min’s little brother throws a baseball from a height of 4 feet with an initial vertical velocity of 20 feet per second. What polynomial models the height of this ball, in feet? –16t2 + t +

Revolt · Accepted Answer

Part 1: 20; Part 2: 4

Question 8

The polynomial –16t2 + vt + h0 models the height, in feet, of a ball t seconds after it is thrown. In this polynomial, v represents the initial vertical velocity of the ball and h0 represents the initial height of the ball.Min throws a baseball from a height of 6 feet with an initial vertical velocity of 30 feet per second. Which polynomial models the height of the ball, in feet?

Revolt · Accepted Answer

-16t² + 30t + 6

Question 9

Which polynomial represents the difference in the heights of the baseballs t seconds after they are thrown?

Revolt · Accepted Answer

10t + 2

Question 10

Compare your response to the sample response above. Did your response …

Revolt · Accepted Answer

… explain what closure means for addition and give an example?; … explain what closure means for subtraction and give an example?

Introduction to Polynomials Answers

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