9(2v – 3) – 5(v+8)
Answer please

Question and answers are in the attached picture. you so much in advance.

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

What is the value of x in the following equation. -x ^3/2 = -27