please help)Simplify: (r – 7)(r + 7)

r - 2

r2 + 12r - 49

r2 – 49

r2 - 2r – 49

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?