Solve the system of equation
2x-y-3z=20
3x+y+6z=4
x+2y+9z=-16

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

Common binomial factor of 6x(3x+7)+5(3x+7)