What is the contrapositive of the conditional statement? If two variables are directly proportional in the graph is a linear function

Find the nonpermissible replacement for binthis expression.b2/5b +5

What percent of 18 is 24? and plz explain thx.

Which of these would have been most likely to have been a carpetbagger during the reconstruction era? a) a new york businessman who relocated to mississippi b) a former slave who was able to buy land in birmingham c) a carolina-born politician who supported the democratic d) a former confederate officer who owned a farm in memphis eliminate