How many solutions does this system have ? -9x + 3y - 6z = 18 12x - 4y + 8z = 24 -3x + y - 2z = 6

The axis of symmetry for the graph of the function f(x)=1/4^2+bx +10 is x=6. what is the value of b?

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.

Find the value of the variable and the length of each chord for #5 and #6.