What are two factors of -10 that add up to -9

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

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.