Worksheets 4.5-4.7

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Academic Worksheet 12.1

Tell whether the expression is a polynomial. If it is a polynomial, list its terms and classify it.

1.

9𝑥

2

4.

7𝑛 −1

+ 6

+ 4𝑛 −2

2.

– 𝑚

5.

𝑎 + 8𝑎𝑏 2 − 5

3.

2𝑝 − 𝑝

6.

3𝑦 2

2

+ 1

+ 4𝑦 −2 − 10

Find the degree of the polynomial.

7.

3𝑐 4

10.

𝑡

3

− 5𝑐

− 𝑠

4

2 − 4 8.

2 + 𝑝 2 − 8𝑝

11.

9𝑚𝑛 + 𝑚𝑛

2

9.

– 𝑤

4

+ 𝑤

3

12.

5𝑥𝑦 + 10𝑥

− 6

2 𝑦

2

Write the expression as a polynomial in standard form.

13.

5ℎ 2 + 6 − ℎ 2 − 1 + 2ℎ

15.

11𝑦 + 5(3 − 2𝑦

2 ) + 6

14.

4𝑧 − 2𝑧

16.

𝑎

2

2 + 9𝑧 − 11

− 7 − 2(4𝑎 + 8)

Evaluate the polynomial when 𝑥 = 5 .

17.

6 − 3𝑥 18.

𝑥

2

+ 𝑥 − 8 19.

9𝑥 − 𝑥

2

+ 2𝑥

3

+ 14

Write a polynomial expression for the perimeter of the figure. Give your answer in standard form.

20.

21.

22.

The height (in feet) of a golf ball 𝑡 seconds after it is hit is given by the polynomial −16𝑡

2

150𝑡 .

+ a.

What is the degree of the polynomial? b.

What is the height of the golf ball 2 seconds after it is hit? c.

What is the height of the golf ball 4 seconds after it is hit?

Evaluate the polynomial when 𝑥 = −2 and 𝑦 = 1 .

23.

7𝑥𝑦 + 3𝑦 24.

𝑦

2

− 3𝑥𝑦 + 𝑥

2

Academic Worksheet 12.2

Find the sum.

1.

(3𝑎 2

+ 2) + (𝑎

2

− 10)

3.

(2𝑑 + 4) + (3𝑑 2 − 9𝑑 − 16)

Find the perimeter of the triangle.

5.

2.

(4𝑦 2

+ 𝑦 − 9) + (𝑦

2

− 2)

4.

(−𝑛 2 − 2𝑛 + 4) + (𝑛 2 + 7𝑛 − 5)

6.

7.

The polynomials below approximate the number of students enrolled as business and science majors in a particular college for each year during the period 1990-2000. In each polynomial, 𝑥 represents the number of years since 1990.

Business majors: −17𝑥

2

+ 200𝑥 + 732

Science majors: 28𝑥 + 956

Write a polynomial that gives the total number of students enrolled each year as business and science majors.

Find the difference.

8.

(2𝑥 2

− 11) − (5𝑥

2

10.

(10𝑡 − 1) − (3𝑡 2

− 14)

− 4𝑡 + 6)

9.

(9𝑤 2

11.

(−𝑛 2

− 𝑤 − 13) − (2𝑤

2

− 6𝑛 − 15) − (𝑛 2

− 16)

+ 7𝑛 − 3)

12.

For a company that manufactures and sells model airplanes, the cost (in dollars) of producing 𝑥 model airplanes is represented by the polynomial 110 + 32𝑥 . The revenue (in dollars) for selling 𝑥 model airplanes is represented by the polynomial 85𝑥 − 𝑥 2

. The profit can be found by subtracting the cost from the revue. Write a polynomial expression for the profit.

Academic Worksheet 12.3

Find the product.

1.

−3𝑦(2𝑦

2

4.

9𝑧(8𝑧 2

− 6𝑦)

− 3𝑧 − 10)

2.

(7𝑐 3

− 9)4𝑐

5.

−6𝑤(−𝑤 2 + 3𝑤 + 1)

3.

11𝑝(4𝑝

2

− 3𝑝)

6.

(𝑡 2 − 6𝑡 − 12)4𝑡 2

Find the quotient.

12 x

2

7.

6 x

3

3 x

10.

5 y

6 

3 y y

2

5  y

3

8.

11.

14 z

2 

28 z

7 z

32 b

4 

24 b

3

8 b

2

16 b

2

9.

8 a

4 

20 a

3

4 a

2

16 a

2

12.

6 d

3 

22 d

2 

32 d

2 d

13.

You have 30 feet of wire fencing that you want to use to make a rectangular pen for chickens.

Let 𝑙 be the length of the pen. What is a polynomial expression in terms of 𝑙 for the area of the pen?

14.

The length of a trampoline is 3 feet less than twice the width. Let 𝑤 be the width of the trampoline. Write a polynomial expression in terms of 𝑤 for the area of the trampoline. Give your answer in standard form.

Academic Worksheet 12.4

Find the product.

1.

(𝑥 + 4)(𝑥 + 2)

4.

(−4𝑝 + 9)(−3𝑝 + 1)

Complete the table.

7.

2.

(2𝑐 − 4)(4𝑐 − 7)

5.

(3𝑤 − 7)(−9𝑤 − 4)

8.

3.

(7𝑦 + 1)(2𝑦 + 8)

6.

(5𝑚 − 2) 2

9.

Write a polynomial expression for the area of the figure. Give your answer in standard form.

10.

11.

12.

You are enlarging a photo that is 4 inches long and 3 inches wide. The length and width of the enlargement are 𝑥 times the length and width of the original photo. The enlargement will have a 1.5-inch mat. Write a polynomial expression for the combined area of the enlargement and mat.

13.

The figure shown is composed of a triangle and a rectangle. Write a polynomial expression for the area of the figure. Give your answer in standard form.

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