Question

need these checked please
Find the common difference of the arithmetic sequence.
-22, -31, -40, -49, ..
-9?

Determine if the following is a mathematical sequence. If it is, what is the common difference?
-1, 10, -100, 1, 100, ....
Not an arithmetic sequence?

Sylvia is going on vacation. She has already driven 60 miles in one hour. Her average speed for the rest of the trip is 57 miles per hour. How far will Sylvia have driven 7 hours later? (The total trip time is 8 hours.)
459?

Answer 1

cd=-19

Answer 2

for first one?

Answer 3

ya pal

Answer 4

hmmm you sure pretty sure thats -9

Answer 5

ya of course

Answer 6

hapy pal?

Answer 7

no didn't trust you so i put -9 and turned it in and it was right it's -9 lol