Elliot wrote a computer program that randomly generates a number from 2 to 10. If he runs the program twice, what is the probability that the number generated both times is a prime number?

2/15

1/6

16/81

9/20

There are 4 primes from 2 to 10, and 9 total results. So, he has a 4/9 chance for the first time, and a 4/9 chance for the second time. Multiplying will get you 16/81.

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this