A surgical technique is performed on seven patients . It is a 70 percent chance it is successful . If it is performed on five patients what is the probability it being successful ?

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Use mathematical induction to prove the statement is true for all positive integers n, or show why it is false. 1^2 + 4^2 + 7^2 + + (3n - 2)^2 = [n(6n^2-3n-1)/2]