Solve the following system of equations using substitution.

5y = x - 15

-3y = -12x - 9

What is the value of x?

(Enter as a fraction)

Which logarithmic equation is equivalent to the exponential equation below? e^a=55(you will receive 34 points)

At his new job, jeremiah can choose an hourly rate of $9 plus a $50 weekly bonus for opening the store, or an hourly rate of $10 per hour with no opening bonus. the equations model his salary options. y = 9x + 50 y = 10x

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual