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9th Grade Substitution Worksheet — Level 3 — Practice Set 2 — 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 — Practice Set 2 — Answers

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

1.If x = −3 and y = 1, find the value of −4x2 − 7y

Answer: −43

  1. −4 × (−3)² − 7 × (1)
  2. = −36 − 7 = −43
2.Find the value of 8x + 4 when x = 7

Answer: 60

  1. 8 × 7 + 4
  2. = 56 + 4 = 60
3.If x = 8 and y = −1, find the value of −x2 + 4y

Answer: −68

  1. −1 × (8)² + 4 × (−1)
  2. = −64 − 4 = −68
4.If x = 9 and y = 3, find the value of 2x2 + 3y

Answer: 171

  1. 2 × (9)² + 3 × (3)
  2. = 162 + 9 = 171
5.Find the value of 9x − 1 when x = 5

Answer: 44

  1. 9 × 5 − 1
  2. = 45 − 1 = 44
6.If x = 5 and y = −5, find the value of −3x2 + 9y

Answer: −120

  1. −3 × (5)² + 9 × (−5)
  2. = −75 − 45 = −120
7.If x = 7 and y = 4, find the value of 7x2 − 4y

Answer: 327

  1. 7 × (7)² − 4 × (4)
  2. = 343 − 16 = 327
8.Find the value of 6x − 5 when x = −1

Answer: −11

  1. 6 × (−1) − 5
  2. = −6 − 5 = −11
9.If x = −3 and y = −5, find the value of 3x2 − 2y

Answer: 37

  1. 3 × (−3)² − 2 × (−5)
  2. = 27 + 10 = 37
10.If x = 2 and y = 1, find the value of 5x2 + 2y

Answer: 22

  1. 5 × (2)² + 2 × (1)
  2. = 20 + 2 = 22
11.Find the value of 2x + 1 when x = 3

Answer: 7

  1. 2 × 3 + 1
  2. = 6 + 1 = 7
12.If x = 5 and y = −2, find the value of x2 + 0

Answer: 25

  1. 1 × (5)² + 0 × (−2)
  2. = 25 + 0 = 25
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