will give brainliest! pls help and give a quick summary for each.. i am learning trig but i really don't understand anything

#7

#9

#10

#11

#14

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.