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aliya0001 [1]
3 years ago
5

Marcie ran the 400-meter race 3 times. her fastest time was 51.3 seconds. Her slowest time was 56.4 seconds. If Marcie's average

time was 53.4 seconds, what was her time for the third race?
Mathematics
1 answer:
Nata [24]3 years ago
6 0

Answer:

<em>52.5 Seconds</em>

<em></em>

Step-by-step explanation:

Let's call, her time for the third race, x.

To find the average (53.4), we add up all the values and then divide this total by the number of values.

So, we will set up our equation.

      56.4 + 51.3 + x

>    ------------------------ = 53.4

                3

To get rid of 3, we will multiply both sides by 3.

>   56.4 + 51.3 + x = 160.2

>   107.7 + x = 160.2

We will subtract 107.7 from both sides to isolate x.

<h2>> x = 52.5</h2><h2></h2><h3><em>I hope it will be understood.</em></h3><h3><em>If I have any inaccuracies please let me know.</em></h3><h3><em>Have a nice day and never stop questioning!</em></h3>
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Pavlova-9 [17]
Since we know that squares have the same length on all sides, you would find the square root of 170
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I try to explain the problem and give the answer, I hope this helps!
7 0
4 years ago
Please do them step by step;
ELEN [110]
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3 years ago
What would the answer for this be
Vedmedyk [2.9K]

Answer: 180

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3 years ago
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faltersainse [42]
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