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Fynjy0 [20]
3 years ago
9

Someone please help! Find the value of x. Then find the angle measures of the triangle.

Mathematics
1 answer:
il63 [147K]3 years ago
5 0

Answer:

In the pic

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)

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Find the area of this regular polygon.<br> Round to the nearest tenth.<br> 8.65 mm<br> [? ]mm2
nadezda [96]

Answer:

Actually it's not polygon. it's a nonagon. With r=8.65mm″, the law of cosines gives us side a:

a=√{b²+c²−2bc×cos40°}

a=√{149.645−149.645cos40°}

Area Nonagon = (9/4)a²cos40°

=9/4[149.645−149.645cos40°]cot20°

=336.70125[1−cos(40°)]cot(20°)

Applying an identity for the cos(40°) does not get us very far…

= 336.70125[1−(cos2(20°)−1)]cot(20°)

= 336.70125[2−cos2(20°)]cot(20°)

= 336.70125[2−(1−sin2(20°))]cot(20°)

= 336.70125[1+sin2(20°)]cos(20°)sin(20°)

= 336.70125[cot(20°)+sin(20°)cos(20°)]mm²

3 0
3 years ago
Which of the following describes the number below? 0.92479247..
kykrilka [37]

Answer:

I believe its D.

Rational Only

Step-by-step explanation:

4 0
3 years ago
How do u solve this ?
svetoff [14.1K]
Okay, I will give you the building blocks for solving this equation.

Now something you will need to remember is that a triangle will always add up to 180 degrees.

We can use y as that one unknown side in the triangle.

Knowing this, we can say (9x+16) + (6x+15) + y = 180

Then we can combine like terms like so : 15x+31+y = 180

There are two variables though.  So we need more information.

Well, turns out we have the exterior angle of a straight line and the angle measures of a straight line must equal 180.  We can now use (19x+3) + y = 180.

With both of these equations, you can now solve and find both of the angles
6 0
3 years ago
Help me please!!!!!!!!!!!
AVprozaik [17]

Answer:

A reflection over the <em>y</em>-axis.

8 0
3 years ago
If f(x) = 3x + 2, find f(f–1(14)).
iren [92.7K]
F equals negative forty. Hope this helps!!
8 0
3 years ago
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