What is the length of DF?

-DE+EF

Step-by-step explanation:

this is because DE is a negative vector because we are moving against the direction

a

step-by-step explanation:

when a number is between two straight lines it means the absolute value.

to find absolute value you need to know how many numbers is that number away from 0.

when finding absolute value the number will always come out positive

so absolute value of -3 is 3

absolute value of 3/2 is 3/2

absolute value of -2 is 2

absolute value of 3.5 is 3.5

absolute value of -1 is 1

now put these numbers in order:

a)   |-1|, |3/2|, |-2|, |-3|, |3.5|

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: