Rewrite 3^-4 without negative exponents

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.