Find the missing term

3b^2 - ? = 9b^2

a. -6b^2
b. -9b^2
c. 12b^2

For which rational expression is -2 an excluded value of x?

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices