Determine whether each sequence is arithmetic or geometric. find the next three terms.
14, 19, 24, 29, . .
a. geometric, 34, 39, 44
b. arithmetic, 32, 36, 41
c. arithmetic, 34, 39, 44
d. the sequence is neither geometric nor arithmetic.
i think this is
c.? what are the first four terms of an arithmetic sequence if the common difference is 1.5 and the first term is 15?
a.15, 30, 45, 60
b.15, 16.5, 18, 19.5
c.15, 22.5, 33.75, 50.625
d. none of the above this is
b.?

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?