A video cassette tape has a running time of 2 hours while at standard speed, 5 hours while at long-play speed, and 7 hours while at super long-play speed. If of the 1 tape is recorded at standard speed, - at long-play speed, and - 4 at super long-play speed, what is the total running time of the video cassette tape? Write the solution 15 as a mixed number or a fraction in lowest terms.

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Rate of Change

The relation between two quantities which displays how much greater one quantity is than another is called ratio.

Slope

The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as: