Atriangle is rotated 90 degrees about the origin, which rule describes the transformation

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?

The bolo cavern outside of vandalia is 421 ft below sea level. a little more than75 miles away. mt owens is 7295 feet above sea level. what is the difference in elevation between the bolo cavern and mt owens?