Which would the phrase "twice the sum of a number and three" look like as a variable expression

Asap! i'm not good math and i'm lost.

Select the number of ways in which a line and a circle can intersect

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible