Uma professora reservou 6 folhas de papel colorido para cada um de seus 28

alunos fazerem um trabalho. Como faltaram alguns alunos, a professora deu 7

folhas para cada aluno presente. Quantos alunos faltaram?

4 students were missing

Step-by-step explanation:

A teacher reserved 6 sheets of colored paper for each of her 28

students do a job. As some students were missing, the teacher gave 7

sheets for each student present. How many students were missing?

6*28=168

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°