The slope of the ramp would be 5/9
48 since he eats 4 a minute and 4 times 12 equals 48.
The number of ways to choose the colors is 36
<h3>How to determine the number of ways?</h3>
The given parameters are:
Colors = 9
Colors to choose = 7
Since order does not matter, then it is combination
This is calculated using:

This gives

Evaluate

Hence, the number of ways is 36
Read more about combination at:
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Answer: 6
Explanation:
x + 2x + 1 + 5x + 4 = 53
8x + 5 = 53
8x = 48
x = 6