Which one is an example of an answer that has many/infinite solution?

Find the slope of the line y =8/9x + 1.

9/10 divide by -3/15 as a mixed number

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)