How many meters are there in 8 and a half kilometers?

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)

Ineed with math stuff it involves graphs

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x