Refer to Expression 1 and Expression 2. Expression 1 6⋅7−32⋅9+43 6⋅7−32⋅9+43

Question

Refer to Expression 1 and Expression 2.

Expression 1

6⋅7−32⋅9+43
6⋅7−32⋅9+43

Expression 2

5+4⋅2+6−2⋅2−1
+⋅+−⋅−

What is the value of Expression 1?

Insert parentheses in Expression 2 so that it has a value of 19. Then show why your expression has a value of 19.

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Delwyn 3 weeks 2023-01-09T01:02:13+00:00 2 Answers 0 views 0

Answers ( 2 )

  1. thucuc
    0
    2023-01-09T01:03:21+00:00
    Reply
    Answer:
    Use the order of operations PEMDAS:
    • Parentheses
    • Exponents
    • Multiplication and Division (from left to right)
    • Addition and Subtraction (from left to right)
    Expression 1
      6 ⋅ 7 – 32 ⋅ 9 + 43
    = 42 – 288 + 43
    = -246 + 43
    = -203
    Expression 2
    Insert parentheses around 5 + 4:
      (5 + 4) · 2 + 6 – 2 ⋅ 2 – 1
    = 9 · 2 + 6 – 2 ⋅ 2 – 1
    = 18 + 6 – 4 – 1
    = 24 – 4 – 1
    = 20 – 1
    = 19

  2. kiet
    0
    2023-01-09T01:04:01+00:00
    Reply
    Answer:
    Expression 1
     6 ⋅ 7 – 32 ⋅ 9 + 43
    = 42 – 288 + 43
    = -246 + 43
    = -203
    Expression 2
    Insert parentheses around 5 + 4:
     (5 + 4) · 2 + 6 – 2 ⋅ 2 – 1
    = 9 · 2 + 6 – 2 ⋅ 2 – 1
    = 18 + 6 – 4 – 1
    = 24 – 4 – 1
    = 20 – 1
    = 19
    Step-by-step explanation:

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )