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3 years ago

My answer is incorrect.. I need help and explanation.. Thank you

Mathematics

1 answer:

Goshia [24]3 years ago

8 0

Octagon:
= [(8-2)×180]÷8
= 135

Angle of LMN is:
= 360-135-60
= 165

Angle of EMN is:
= 180÷3
= 60

The number of side is :
[(n-2)×180]÷n = 165
(180n-360)÷n = 165
180n-360 = 165n
180n-165n = 360
15n = 360
n = 360÷15
n = 24

So, the number of side of the regular polygon R is 24.

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I really need help with this question!

Bingel [31]

I would convert -2pi / 3 to degrees first by multiplying by 180degrees / pi. It equals 120 degrees.

120 degrees is in quadrant II, which is 90 degrees plus 30 degrees. It is 60 degrees from the 180 degrees.
So the reference triangle you use is 60 degrees.
Cos60 = 0.5
sin60 = sqrt(3) /2

But in quadrant II the only trig ratio that's positive is sin; all others are negative.
So cos120 = -0.5
sin60 = sqrt(3) /2

<span>Keeping in mind that points on unit circle are (cos, sin), the point is </span>(-0.5, <span>sqrt(3) /2).
</span>

6 0

3 years ago

Determine x for a right triangle where the hypotenuse is equal to 5 and one leg is equal to 4. A.) 9 B)3 C) 1 D) 5 which one is

const2013 [10]

B. 3
A^2+B^2=C^2
4^2+B^2=5^2
16+B^2=25
25-16=B^2
9=B^2
3=B

8 0

4 years ago

Read 2 more answers

60 degrees in radius

jekas [21]

To convert to radians, multiply the number of degrees by π/180°.
$60 * \frac{ \pi }{180} \\ \frac{60 \pi }{180} \\ \frac{ \pi }{3}$

60° in radians is π/3.

Hope this helps!

4 0

3 years ago

21. Water that is sprayed upward from a

sleet_krkn [62]

Answer:

2 seconds to maximum height
20 meters maximum height
4 seconds to reach the ground

Step-by-step explanation:

The function can be graphed using a graphing calculator, geometry app, or spreadsheet. One such graph is attached. Often, these tools are capable of identifying extrema and intercepts.

<h3>extreme</h3>

The vertex of the graph is reported as (x, y) = (2, 20). This means the maximum height is reached after 2 seconds. That maximum height is 20 meters.

<h3>intercept</h3>

The drop is launched from ground level at x = 0 seconds. It returns to ground level at x = 4 seconds.

3 0

2 years ago

Lawrence father gave him 200 baseball card declines purchases 25 baseball cards to add to his collection of weeks after starting

Fed [463]

Answer:

The inequality is $25w+200> 750.$

Step-by-step explanation:

<u><em>The question is incomplete so the complete question is attached below:</em></u>

Now, to write an inequality that can be used to find $w$ , the number of weeks after starting his collection when Lawrence will have more than 750 baseball cards in his collection.

Let the number of weeks be $w.$

Number of cards Lawrence purchases each week = 25.

Number of cards Lawrence's father gave him = 200.

Total number of cards Lawrence will have more than in his collection = 750.

Now, to write an inequality that can be used to get the number of weeks after starting his collection when Lawrence will have more than 750 baseball cards in his collection:

$25\times w+200>750$

$25w+200> 750.$

Therefore, the inequality is $25w+200> 750.$

3 0

4 years ago