Identify the property that justifies the statement: If 3x=-21, then x=-7.

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

The table shows the number of students who signed up for different after school activities. activity students cooking 9 chess 4 photography 8 robotics 11 select the true statements about the information in the table.