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madam [21]
3 years ago
5

What is the value of n?

Mathematics
2 answers:
sattari [20]3 years ago
6 0

Answer:

95°

Step-by-step explanation:

To get the value of n° we must get the values of the traingle angle's sides

and to do that :

  • 180°-144°=36° the first one
  • 180°-121°= 59° the second one
  • 180°-(59°+36°)= 85 the third one
  • n) = 180-85° = 95°
xenn [34]3 years ago
4 0

Answer:

the answer is D

Step-by-step explanation:

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A#27 - Surface Area
ollegr [7]

Answer:

Step-by-step explanation:

Surface area is finding the area of each face and adding them up.  So a cube will have 6 faces, each of them a square.  So find the area of one face and you can just add it 6 times.  If the faces are not all the same you have to find them seperately.  I won't do all of your questions, but let me know if you need help with a specific one

1) there are two trianglular faces and three rectangular ones.  The triangles are the same so let's do those.  They have the base and height of 4 and 3, so area of both will be .5*4*3 = 6, so together that makes 12.  now the three rectangular sides.  Right away you can see there is a 3 by 10 one and a 4 by 10 one.  These ahve areas of 30 and 40 respectfully.  The final face has one length of 10 but the last one is actually the last side of the right triangle faces.  Use the Pythagorean theorem to find it, it word out to be 5.  So now we know the last face is 10 by 5 which means an area of 50.  So let's add them all together.  5 faces total with areas of 30, 40, 50, 6 and 6.  Adding them together makes 136.

If you don't get how I did any of that let me know.  In general it's a good idea to mark every face and then find what their sides are.  I'd be happy to help with specific problems.

Now the second part, again I will do the second one because cones are  little less intuitive.  a cone has two faces, the circular base and the actual cone shape.  the surface area of the cone shape is pi*r*L where r is the radius of the base and L is the length of one of the slanted sides.  Now, let's find the area of the two faces.  Area of a circle is pi*r^2 so that's pi*4^2 = 16*pi in number 2.  Then the area of the cone part is pi*r*L = pi*4*14 = 56*pi.  now we sum all the areas of the faces up and get 16*pi + 56*pi = 72*pi.  

Again, I'm happy to answer specific questions, so let me know if you have any.  just keep in mind what I told you so far, find each face, then find each face's area then sum them up.  For cylinders the tubes turn into rectangles where one side is the length of the tube and the other is the circumference, while cones fave two faces, the circular base and the cone shape itself with an area of pi*r*L.  if you want me to check your answers I will totally do that too.  

4 0
3 years ago
There are 3 grams of sodium in 1⁄2 of a liter of soda. How much sodium is in 2⁄3 of a liter of soda?
denis-greek [22]

Answer:

4 grams in 2/3 liter of soda.

3 0
2 years ago
Which equation is true for the value x = 15?
boyakko [2]
The third one because 2(15+5)=2(20)=40
4 0
3 years ago
The force newton(N),between two particles is inversely propotional to the square of the distance ,d m,between them.When particle
bonufazy [111]

Answer: 1.6\ N

Step-by-step explanation:

Given

The force between the two particles is inversely proportional to the distance between them

\Rightarrow F\propto \dfrac{1}{d^2}

When the distance is 2 m, the force is 10 N. For 5 m distance, it is

\Rightarrow \dfrac{10}{F_o}=\dfrac{5^2}{2^2}\\\\\Rightarrow F_o=10\times \dfrac{2^2}{5^2}\\\\\Rightarrow F_o=1.6\ N

Thus, the force between them is 1.6\ N

6 0
2 years ago
A coin is biased to show 35% heads and 65% tails. the coin is tissed twice. what is the probability that the coin turns up heads
bekas [8.4K]
The required probability is:
P(1\ heads\ and\ 1\ tails)=2C1\times0.35\times0.65=0.455
The answer is 0.455.
6 0
3 years ago
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