Answer:
The race began at 12.
Step-by-step explanation:
He finish at 2 hours and 45 minutes. If you go back 2 hours and 45 minutes from the clock it is 12.
Shown below
<h2>Explanation:</h2>
The stairway to a cellar has a slope of -4/3, that is:

On the other hand, the cellar is 2m below the ground. In other words:

So this can be modeled by the equation of the line:

The line has a y-intercept at point (0, -2) and as x increases 3 units y decreases 4 units. So:

Finally, let's draw a line that passes through:

By using graphing tool, we get the line shown below.
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Answer:
5
Step-by-step explanation:
50%. 60/2=30 or 60*.5=30. Dividing by two or multiplying by .5 are the same as taking 50%, meaning that there was a 50% discount