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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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Levart [38]

Answer:

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3 years ago
Cos 30° cos 450 -sin 30° sin
Vedmedyk [2.9K]

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<h3>How to solve Trigonometric Identities?</h3>

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We know that the trigonometric values of these in surd form are;

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Thus;

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you are working with a 30-60-90 right triangle. its longer leg measures 6. What is the length of the hypotenuse
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Answer:

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Step-by-step explanation:

Ratio of the lengths of the sides of a 36-60-90 triangle:

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