What can be involved in an algebraic expression

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is

Idon't want to fail summer school.the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table.the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.

What 620000 divided by 10 to the third power