3 years ago

Helpppppppppp with this question???

Mathematics

1 answer:

irakobra [83]3 years ago

3 0

Pretty sure it’s the second one

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Complete the table with the number of sit-ups you have to do sunday so that the mean number of sit-ups per day is 100

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The mean is the average of the numbers.

It is easy to calculate: add up all the numbers, then divide by how many numbers there are.

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The number of days is 7.

Thus, the mean is

$\text{mean}=\dfrac{525+x}{7}.$

You know that the mean number of sit-ups per day is 100, equate these two means and solve the equation:

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Find the length of side x in simplest radical form with a rational denominator.

alekssr [168]

Answer:

$x = \frac{2*\sqrt{3}}{3}$

Step-by-step explanation:

Reference angle = 30°

Opposite side = x

Adjacent side = 2

Apply the tan trigonometric function, thus:

$tan (30) = \frac{opp}{adj}$

$tan (30) = \frac{x}{2}$

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Rationalize

$\frac{2* \sqrt{3}}{sqrt{3} * \sqrt{3}} = x$

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