Sure, let's go through the steps to solve the question.
Given the expression:
[tex]\[ -3b^2 + 25 \][/tex]
We need to find its value when [tex]\( b = 7 \)[/tex].
First, substitute [tex]\( b \)[/tex] with 7 in the expression:
[tex]\[ -3(7)^2 + 25 \][/tex]
Next, calculate [tex]\( 7^2 \)[/tex]:
[tex]\[ 7 \times 7 = 49 \][/tex]
Now, substitute 49 back into the expression:
[tex]\[ -3 \times 49 + 25 \][/tex]
Next, perform the multiplication:
[tex]\[ -3 \times 49 = -147 \][/tex]
Finally, add 25 to -147:
[tex]\[ -147 + 25 = -122 \][/tex]
So, the value of the expression when [tex]\( b = 7 \)[/tex] is:
[tex]\[ -122 \][/tex]
Therefore, the best answer is:
A. -122
