What is the value of the expression below when y= 8 and z= 9?

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

Wrote and expression for the difference of p and 4

Simplify. 3(4+4x) (type your answer in with no spaces)