What is the second step to solving 49n+986=-43 and why?

Name the type of angle shown.calculation tip: common types of angles are zero, straight, right, acute, or obtuse.

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

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