What is the midpoint of line segment ab, when a(7, 3) and b(7, -7)?

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.