12 out of 30 students in mrs. Simth's class are boys. what percent of the class is made up of girls

60%

Step-by-step explanation:

If there are 12 boys, then there are 30 - 12 = 18 girls

x 100 = 60%

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°