msfaybiiee9934
msfaybiiee9934 msfaybiiee9934
  • 22-02-2016
  • Mathematics
contestada

If the value of b is 7, then what is the value of the expression -3b2 + 25 = ? A. 122 B. –122 C. 172 D. 17

Respuesta :

Amphitrite1040
Amphitrite1040 Amphitrite1040
  • 22-02-2016
-3 × 39 + 25
-147 + 25 
=
-122

So this means your answer would be: B. -122 


Answer Link
Exvited
Exvited Exvited
  • 22-02-2016
We first need to substitute in the value of b, which is 7. 

[tex]-3(7)^2 + 25 \\ \\ -3 \times 49 + 25 \\ \\ -147 + 25 \\ \\ -122 \\ \\ [/tex]

The final result is, B) -122.
Answer Link

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