Which of the following is a valid probability distribution?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

When rolling 26 sided number cube what are the chances some of the role will be seven