21 divided by 4,857 with remainder

What are “like terms”? why can we only add like terms?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r