Figure pqrs is a parallelogram. the expressions represent the measures of the angles in degrees.

what is the value of x?
a.5
b.10
c.20
d.25

we know that

In a parallelogram consecutive angles are supplementary

In this problem

Angle Q and Angle R are consecutive angles

so

Solve for x

therefore

the answer is the option C

the graph on the bottom right

since no one answered yet i will give it a shot, not completely sure tho.

i think it should be y=cos(x+2pi), (third answer, answer c)

good luck.