It takes Marty 1 1/4 hours to get ready for school. If 1/5 of that time is used to shower and 1/3 of that time is used to eat breakfast, how long does it take to shower and eat breakfast

  2/3 hour

Step-by-step explanation:

We can add the fractions, then multiply by the time, or we can multiply each by the time and add the results.

  (1/5 +1/3)(1 1/4) = (8/15)(5/4) = (4·2·5)/(3·5·4) = 2/3 . . . hours

alternatively, ...

  (1/5)(1 1/4) +(1/3)(1 1/4) = (1/5)(5/4) +(1/3)(5/4)

     = 1/4 +5/12 = 3/12 +5/12 = 8/12 = 2/3 . . . hours

It takes Marty 2/3 hours (40 minutes) to shower and eat breakfast.

the total amount of time

it takes to shower and eat breakfast is 2/3 hour.

Step-by-step explanation:

The total amount of time that it takes Marty to get ready for school is 1 1/4 hours. Converting to improper fraction, it becomes 5/4 hours.

If 1/5 of that time is used to shower, it means that the it takes to shower is 1/5 × 5/4 = 1/4 hour.

If 1/3 of that time is used to eat breakfast, it means that the time it took to eat breakfast is 1/4 × 5/4 = 5/12 hour.

Therefore, the total amount of time

it takes to shower and eat breakfast is

1/4 + 5/12 = 8/12 = 2/3 hour

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

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