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Refer to Expression 1 and Expression 2.
Expression 1
6 x 7 - 3^2 x 9 + 4^3
Expression 2
5 + 4 x 2 + 6 - 2 x 2 - 1
(a) What is the value of Expression 1?
(b) Insert parentheses in Expression 2 so that it has a value of 19. Then show why your expression has a
value of 19.

Respuesta :

mhanifa

Answer:

  • See below

Step-by-step explanation:

a)

Expression 1

  • 6 × 7 - 3² × 9 + 4² =
  • 6 × 7 - 9 × 9 + 16 =
  • 42 - 81 + 16 =
  • -23

b)

Expression 2

5 + 4 × 2 + 6 - 2 × 2 - 1 as it is the result is:

  • 5 + 8 + 6 - 4 - 1 =
  • 14

We'll add the parentheses considering we need to increase the result by 5:

  • (5 + 4) × 2 + 6 - 2 × 2 - 1 =
  • 9 × 2 + 6 - 2 × 2 - 1 =
  • 18 + 6 - 4 - 1 =
  • 19

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