What is the counterexample for the conjecture? Conjecture:Any number that is divisible by 4 is also divisible by 8

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.