Can you guys please help me with this math question? Thank you!

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. the mean arrival rate is 10 passengers per minutes. compute the following probabilities. p(x = 4) p(x > 11)

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