garvindemartajah0 garvindemartajah0
  • 23-08-2021
  • Mathematics
contestada

Help me pls i have to finish my homework i have more questions to post too

Help me pls i have to finish my homework i have more questions to post too class=

Respuesta :

jimrgrant1 jimrgrant1
  • 23-08-2021

Answer:

8 and 32

Step-by-step explanation:

(19)

x³ ÷ 3 - y ( substitute x = 3, y = 1 into the expression )

= 3³ ÷ 3 - 1

= 27 ÷ 3 - 1

= 9 - 1

= 8

-------------------------------------------------------------

(21)

12k - h² ( substitute h = 2, k = 3 into the expression )

= 12(3) - 2²

= 36 - 4

= 32

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