Combining functions: mastery test awnsers

Find the sum of the first 8 terms of the following sequence. round to the nearest hundredth if necessary.

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality