108,-72,48,..; 5th term

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?

In the next 10 month, colin wants to save $900 for his vacation. he plans to save $75 each of the first 8 months. how much must he save each of the last 2 months in order to meet his goal if he saves the same amount each month ?