Perform the indicated operation. 61/2 · 4/5? a.5 1/5 b.6 2/5 c.3 1/5 d.4 2/5

5  1/5

Step-by-step explanation:

6 1/2 *4/5

Rewriting as an improper fraction

( 2*6 +1)/2 *4/5

13/2 *4/5

52/ 10

50/10 + 2/10

5 +1/5

5  1/5

A. 5 1/5

Step-by-step explanation:

6 1/2 × 4/5

Convert 6 1/2 to an improper fraction.

13/2 × 4/5

Multiply both fractions.

52/10

Convert the improper fraction to a mixed fraction.

5 2/10

⇒ 5 1/5

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step-by-step explanation:

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reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.