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sashaice [31]
2 years ago
12

PLEEASE HELP FASSSTTT

Mathematics
2 answers:
Bas_tet [7]2 years ago
6 0

Answer:

A. 20/21

Step-by-step explanation:

In order to find this you must divided 16/21 by 4/5

Or 16/21 * 5/4 which is 80/84

After reducing you get 20/21

shutvik [7]2 years ago
4 0
A. 20/21 foot
In order to get this answer you must divide 16/21 by 4/5.
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Hope this helps!

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3 years ago
A group of 5 students took 15 days to finish a project. After 9 days, 3 students left the group. How many days did it take the s
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Using proportions, it is found that it took 15 days for the students to finish the project.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.

In this problem, we have that:

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  • After the 3 students left, 2 students will have a time of x days to do 100 - (9/15) = 40% of the project.

The compound <em>rule of three</em> is given as follows:

1 project - 5 students - 15 days

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Increasing the number of students, the number of days is reduced, hence the measures are inverse proportional and the <em>rule of three</em> is given by:

\frac{15}{x} = \frac{2}[5} \times \frac{1}{0.4}

\frac{15}{x} = \frac{2}{2}

15/x = 1

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It took 15 days for the students to finish the project.

More can be learned about proportions at brainly.com/question/24372153

#SPJ1

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2 years ago
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Answer:

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