Find the mean of the squares of the first 10 counting numbers.

38.5

Step-by-step explanation:

Find the mean of the squares of the first 10 counting numbers ... Mean = 1 + 4 + 9 + 16 + 25 + 36 + 49 + 64 + 81 + 100 / 10 = 385 / 10 = 38.5

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°