Identify, the terms, coefficient, and variable in each expression. 4 b + y +2

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Name the quadrilaterals that have four equal sides.

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