Can anybody tell me what x is x+1=2^(7x+13)

What is the length of an with endpoints a 3,2 and b 8,14

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76