Q9:

Angle V and ∠W share a side and the sum of their measures is 180°. What do you know about these angles? Select yes or no. They are complementary angles.

They are a linear pair.

They are vertical angles.

They are supplementary angles.

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is