Answer:
18. x² + x - 4
20.
or 
22. x² + 2x - 2
Step-by-step explanation:
For some reason my work was unable to be submitted so please see attachment for detailed explanation
Answer:
I think it's uhm twelve I'm not 100% sure though
Answer:
her average speed is 16 miles per hour
Step-by-step explanation:
do 48 divided by 3 = 16
Ok so add all of them together and you get 305 then divide it by how many numbers there are for the mean and you get 61 then add all of the diffrences from each number to the mean and we get 6 then 61 divided by 6 gets us 10.1 but round it to 10. hope this helped.