Answer:
The students where asleep and did not have phones turned on.
Step-by-step explanation:
<h3>
Answer: Choice A</h3>
-11, -15, -19
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Explanation:
Plug x = -11 into the function.
f(x) = x-4
f(-11) = -11-4
f(-11) = -15
The output -15 is now the input to set up the next iteration.
f(x) = x-4
f(-15) = -15-4
f(-15) = -19
The first three iterates are -11, -15, -19
=(4-x^2)(a+b)
=(2^2-x^2)(a+b)
=(x+2)(x-2)(a+b)
I think it hopefull to you