The first term of a geometric sequence is -2 and the multiplier, or ratio, is -3. what is the sum of the first 5 terms of the sequence?
a. 162
b. 122
c. -122
d. -162

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?