Simplify 2 + 17x – 5x + 9.

A. 19x + 4
B. 12x + 11
C. 22x + 11
D. 15x - 4

Which function represents the sequence? f(n)=n+3 f(n)=7n−4 f(n)=3n+7 f(n)=n+7

Geometry triangles(ignore the handwriting)

The life, in years, of a certain type of electrical switch has an exponential distribution with an average life b = 2. if 100 of these switches are installed in dif- ferent systems, what is the probability that at most 30 fail during the first year?