A zero in front of the x would make this a difference of two perfect squares. All of the other option would interfere by adding another term.
There could be lots of answers. I'm going with 5 goats and 7 ducks.
By the graph of a straight line through the origin with a slope equal to the unit rate
Answer:
I can't put the symbol in but less then or equal to 45mph
Step-by-step explanation: