8x(40+7)=(8x )+(8x7 what is the missing number

What aspects of lines have to be diffrent

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

Solve the equation for b: a= (1/2)(b)(h)