Alex met claire boucher (grimes) at mcgill. he has been waiting for the release of her next album. assume that the waiting time is exponential with mean 3 years. to keep up with releases alex receives resident advisor’s monthly album review newsletter. assume that the album will be featured in the next issue after its release. let x be the number of newsletters required to get news of the release of the album. find the probability mass function of x.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.