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3 years ago

What’s the missing angle

Mathematics

2 answers:

ICE Princess25 [194]3 years ago

8 0

Answer:

Step-by-step explanation:

Well, if i rember correctly, all triangle have a total of 180 degrees, so 120 plus 35 = 155.

Then do 180 - 155 to get 25, which woud be your answer

Olegator [25]3 years ago

4 0

Answer:

Step-by-step explanation:

180 - 120 - 35

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Standard form is written according to the highest exponent on the variable to the lowest. This expression has exponents that descend from 8 to 7 and to 1. B is the correct solution.

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3 years ago

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3 years ago

The second term is 8 and the fifth term is -27. Find a1 in this geometric sequence.

Kay [80]

Answer:

$a_{1} = \frac{-16}{3}$

Now the Geometric sequence

$\frac{-16}{3} , 8 ,-12 ,18 ,-27$

Step-by-step explanation:

Step(i):-

Given second term is '8'

$t_{n}= a r^{n-1}$

$t_{2}= a r^{2-1}$

$a r^{2-1} = 8$

a r = 8 ...(i)

And also given fifth term is -27

$t_{5}= a r^{5-1}$

$a r^{4} = -27$ ...(ii)

Step(ii):-

Now simplify

$\frac{a r^{4} }{ar} = \frac{-27}{8}$

$r^{3} = \frac{-27}{8}$

$r^3 =\frac{(-1)^{3} (3)^{3} }{(2)^{3} }$

$(r^3)^{\frac{1}{3} } =(\frac{(-1)^{3} (3)^{3} }{(2)^{3} })^{\frac{1}{3} }$

On simplification, we get

$r = \frac{-3}{2}$

now from(i)

a r = 8

$a(\frac{-3}{2} ) = 8$

$a = \frac{-16}{3}$

$a_{1} = \frac{-16}{3}$

Now the Geometric sequence

$\frac{-16}{3} , 8 ,-12 ,18 ,-27$

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3 years ago