Class 10R sat a test the mean mark for the class is 70% there are 30 students in that class 20 of whom are boys the mean mark for the boys is 62% find out the mean for the girls

ian gone lie this got me confused

step-by-step explanation:

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°

cant see photo

step-by-step explanation: