Final answer:
The formula for speed is distance divided by time. Acceleration is the rate of change of velocity, and a combination of two vectors and a scalar would be displacement, speed, and velocity.
Step-by-step explanation:
The formula for speed is distance divided by time. So, to fill in the blank, the correct answer is 'd. time.'
When we explore further into the topic of physics, particularly in the kinetics and motion sections, acceleration is defined as the rate at which velocity changes. Graphs that depict motion can be plotted with various quantities on the axes. A displacement versus time graph, for example, shows the change in position (displacement) over time, while an acceleration versus time graph shows how acceleration varies over time.
When dealing with vectors and scalars, recall that displacement and velocity are vectors because they include both magnitude and direction, while speed is a scalar quantity as it represents only magnitude. Thus, in a collection containing two vectors and a scalar, the correct combination would be 'd. displacement, speed, velocity,' noting that speed is the scalar.