What is the value of s in the equation 3r = 10 + 5s, when r = 10?

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Which of the following is true for the relation f(x)=2x^2+1

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom