Which of the following points lie in the solution set to the following system if inequalities?

Abcd is a parallelogram find the valuse of x

Need so much on this one how many yards?

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when equals y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15