John sees the expression x^2+3x-5. He decides to substitute 7 for the first x and 2 for the second x. What axiom has he violated?

There is diarrhea on the floor. what do i do? my mum gonna see that i diarrhea on the floor! * don't report, i'm serious! *

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

To determine the number of deer in a forest a forest ranger tags 280 and releases them back