In quadrilateral pqrs below, sides ps and qr are parallel for what value of x ?

Quadrilateral simply means a shape with 4 sides. It is 2 dimensional closed shape with straight lines. Its interior angles should sum up to 360°

If the angle of P = 70° , the angle of S = 112° 
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PS  and QR are parallel for what value of x.

x = angle of Q.
180° - 70° = 110°

the angle of R should be 180° - 112° = 68°

To check whether the interior angles sum up to 360°, we add up all angles

P =   70°
Q = 110°
R =   68°
S = 112°
       360°

Ithink it would be 160 people