A stadium has 30 rows. The first row has 18 seats. Each row has 3 more seats than the previous row.
How many seats are in the 25th row?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

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

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height