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9th Grade Substitution Worksheet — Level 3 — Answers

Answer sheet with worked solutions for the 9th Grade algebraic expressions worksheet.

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Success TutoringWorksheetsAnswer sheet9th Grade · Mathematics · Algebraic Expressions

9th Grade Substitution Worksheet — Level 3 — Answers

Replace the letter with the number, then calculate. Use parentheses for negative values.

1.If x = 1 and y = 6, find the value of 6x2 + 5y

Answer: 36

  1. 6 × (1)² + 5 × (6)
  2. = 6 + 30 = 36
2.If x = −3 and y = 5, find the value of 8x2 − 8y

Answer: 32

  1. 8 × (−3)² − 8 × (5)
  2. = 72 − 40 = 32
3.If x = −4 and y = −5, find the value of −4x2 + 6y

Answer: −94

  1. −4 × (−4)² + 6 × (−5)
  2. = −64 − 30 = −94
4.If x = −6 and y = −1, find the value of −5x2 − 3y

Answer: −177

  1. −5 × (−6)² − 3 × (−1)
  2. = −180 + 3 = −177
5.If x = 4 and y = −1, find the value of −x2 − 2y

Answer: −14

  1. −1 × (4)² − 2 × (−1)
  2. = −16 + 2 = −14
6.Find the value of 7x + 3 when x = 9

Answer: 66

  1. 7 × 9 + 3
  2. = 63 + 3 = 66
7.If x = 1 and y = 5, find the value of 3x2 − 6y

Answer: −27

  1. 3 × (1)² − 6 × (5)
  2. = 3 − 30 = −27
8.Find the value of 8x − 8 when x = 3

Answer: 16

  1. 8 × 3 − 8
  2. = 24 − 8 = 16
9.Find the value of 2x + 4 when x = 7

Answer: 18

  1. 2 × 7 + 4
  2. = 14 + 4 = 18
10.Find the value of 3x − 6 when x = 2

Answer: 0

  1. 3 × 2 − 6
  2. = 6 − 6 = 0
11.Find the value of x + 8 when x = −5

Answer: 3

  1. 1 × (−5) + 8
  2. = −5 + 8 = 3
12.Find the value of 3x − 3 when x = −6

Answer: −21

  1. 3 × (−6) − 3
  2. = −18 − 3 = −21
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