1. There are 15 sixth graders, 10 seventh graders, and 16 eighth graders in a gym class. The gym teacher randomly selects one student to collect balls. In how many ways can choosing not a seventh grader occur?
A) 10 ways
B) 31 ways
C) 26 ways
D) 41 ways

'Option B' is the correct answer

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

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°