Chapter 7 of the text: Section 7.1 and 7.2

Section 7.1: Exercise 22, 24, 36, 38, 42, 56, and 70

Section 7.2: Exercise 8, 12, 16, 22, 26, 36, and 44

Section 7.1

The graphs of the following systems are given in (a) through

(d). Match each system with the correct graph.

22) 3x – 5y = -9

5x – 6y = -8

24) 4x + 5y = -2

4y – x = 11

Solve each system by substitution. Determine whether the

Equations are independent, dependent, or inconsistent.

36) y = -3x + 19

y = 2x – 1

38) y = -4x – 7

Y = 3x

42) y = x + 4

3y – 5x = 6

56) 2x – y = 4

2x – y = 3

Solve each system by the substitution method.

70) x + 3y = 2

-x + y = 1

Section 7.2

Solve each system by addition.

8) x + y = 7

x – y = 9

12) x – 2y = -1

-x + 5y = 4

16) 3x + 5y = -11

x – 2y = 11

22) 2x = 2 – y

3x + y = 11

Solve each system by the addition method. Determine whether

the equations are independent, dependent, or inconsistent.

26) x – y = 3

-6x + 6y = 17

Solve each system by the addition method. Equation evolving fractions or decimals.

36) 3/7x + 5/9y = 27

1/9x + 2/7y = 7

44) 3x – 2.5y = 7.125

2.5x – 3y = 7.3125

Section 7.1: Exercise 22, 24, 36, 38, 42, 56, and 70

Section 7.2: Exercise 8, 12, 16, 22, 26, 36, and 44

Section 7.1

The graphs of the following systems are given in (a) through

(d). Match each system with the correct graph.

22) 3x – 5y = -9

5x – 6y = -8

24) 4x + 5y = -2

4y – x = 11

Solve each system by substitution. Determine whether the

Equations are independent, dependent, or inconsistent.

36) y = -3x + 19

y = 2x – 1

38) y = -4x – 7

Y = 3x

42) y = x + 4

3y – 5x = 6

56) 2x – y = 4

2x – y = 3

Solve each system by the substitution method.

70) x + 3y = 2

-x + y = 1

Section 7.2

Solve each system by addition.

8) x + y = 7

x – y = 9

12) x – 2y = -1

-x + 5y = 4

16) 3x + 5y = -11

x – 2y = 11

22) 2x = 2 – y

3x + y = 11

Solve each system by the addition method. Determine whether

the equations are independent, dependent, or inconsistent.

26) x – y = 3

-6x + 6y = 17

Solve each system by the addition method. Equation evolving fractions or decimals.

36) 3/7x + 5/9y = 27

1/9x + 2/7y = 7

44) 3x – 2.5y = 7.125

2.5x – 3y = 7.3125

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