I have a link from a really good video i had his problem but i couldnt solve it so i watched this video
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</span>https://www.youtube.com/watch?v=iGeajxe0W50
Rate = distance / time.
Distance= 9/10
Time = 1/10
Rate = 9/10 divided by 1/10 which is 9.
9 meters per second.
540 meters per minute.
Answer:
27. The formula of vertex equals to

put -1 into y, 1-2+5=4=y
So,the answer of vertex (-1;4)
First,
(x•1)+(x/1) = x+x
Then,
x+x=2x