(-2) + (-4) =
5 7

(9) + (-4) =
10 9
me ayudan? :c

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?

Free points also plz look my profile and answer really stuff

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21