What does rewrite each expression as a sum mean?
-8x^2+3xy-9x-3

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.

How are algebraic expressions evaluated using substitution?

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume