What length of magma channel is below sea level?

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Find the distance between (0,5) & (-4,2)