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kati45 [8]
3 years ago
13

Please help and explain!! Will give medal!

Mathematics
1 answer:
Elena L [17]3 years ago
7 0
Https://us-static.z-dn.net/files/ddf/960d9c7b1f4f7f9852c4a9f5f668740f.jpeg

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Help me​ guys fast as ​
Viktor [21]
  • cos(180-x)=-cosX

\\ \rm\Rrightarrow tan^2135-cosec^260=-xcos45.sin45.cot60

\\ \rm\Rrightarrow (-1)^2-(\dfrac{2}{\sqrt{3}})^2=-\dfrac{x}{\sqrt{2}}\times \dfrac{1}{\sqrt{2}}\times \dfrac{1}{\sqrt{3}}

\\ \rm\Rrightarrow 1-\dfrac{4}{3}=\dfrac{-x}{2\sqrt{3}}

\\ \rm\Rrightarrow \dfrac{3-4}{3}=\dfrac{-x}{2\sqrt{3}}

\\ \rm\Rrightarrow \dfrac{-1}{3}=\dfrac{-x}{2\sqrt{3}}

\\ \rm\Rrightarrow \dfrac{1}{\sqrt{3}}=\dfrac{x}{2}

\\ \rm\Rrightarrow x=\dfrac{2}{\sqrt{3}}

4 0
2 years ago
Nick's science test has a section with twelve true-or-false questions. In how many different ways can Nick answer the questions?
frez [133]

Answer:

you can do 2^12=4096

there are 4096 different ways nick can answer the question

5 0
3 years ago
Solve 10 3/4 - 6 4/5
MAXImum [283]
Alright, so the first thing I would do is find the LCM of the dividends, which is 20.  So we have 10 15/20 and 6 16/20.  You can either leave it there and just carry the one (20 in this case) for 3 19/20.
If you multiply 10 by 20 and add 15, or 6 by 20 and add 16 (which I think is easier) you get 215/20 - 136/20 = 79/20.  It can be simplified from here if you teacher wants it in the future.
7 0
3 years ago
Read 2 more answers
Which of the following points is in the solution set of y > -x2 + 5? (0, 5) (1, 3) (2, 4)
mylen [45]

Answer:

(2, 4)

Step-by-step explanation:

The only point that satisfies the inequality is (2, 4).

(0, 5) : -0^2 +5 = 5 . . . . . not > 5

(1, 3) : -1^2 +5 = 4 . . . . . . 3 is not > 4

(2, 4) : -2^2 +5 = 1 . . . . . . 4 is greater than 1, so this point is in the solution set.

5 0
3 years ago
he table shows the cost of downloading songs. Number of Songs Cost 0 0 1 $1.25 2 $2.50 3 $3.75 4 $5.00 What does the rate of cha
horsena [70]
From the table we can see:
Number of songs:         Cost:
          0                         $ 0
          1                         $1.25
          2                         $2.50
          3                         $3.75
          4                         $5.00
Therefore the rate of change is: (2.50 - 1.25) / ( 2 - 1 ) = $1.25
Answer:
It means that : C. The cost increases $1.25 for each additional song that is downloaded.

3 0
3 years ago
Read 2 more answers
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