Answer:
Complementary angles.
Step-by-step explanation:
Notice that 
and 
, by given.
, by sum of angles.
, by supplementary angles definition.
Which means,
Therefore,
, in other words, angles a and b are complementary by definition.
The question is asking to write and equation by using the two variable in the standard form that ca be used to describe the velocity of thecar at different times and base on my calculation, I would say that the answer would be v=4t+39. I hope you are satisfied with my answer and feel free to ask for more
