Which equality represent the proportion $10 is to 11 cans as $20 is to 22 cans

What does x = in this equation x+3+2x=x+5

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?