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Sloan [31]
3 years ago
13

If sin(2x)=cos (x+30°), what is the value of x?

Mathematics
1 answer:
Murljashka [212]3 years ago
3 0

Answer:

x=20

Step-by-step explanation:

Please mark as brainliest

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14.2

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HElP aND tHEy Are all DiffERent ???/questions
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Is x + 10 a factor of the function f(x) = x3 − 75x + 250? Explain.
PtichkaEL [24]
Yes. When the function f(x) = x3 – 75x + 250 is divided by x + 10, the remainder is zero. Therefore, x + 10 is a factor of f(x) = x3 – 75x + 250. 

According to the remainder theorem when f(x) is divided by (x+a) the remainder is f(-a). 
In this case, 
f(x)=x^3-75x+250 
(x+a)=(x+10) 
Therefore, the remainder f(-a)=f(-10) 

=x^3-75x+250 
=(-10)^3-(75*-10)+250 
=-1000+750+250 
=1000-1000 
=0. 
The remainder is 0. So, (x+10) is a factor of x^3-75x+250.
8 0
3 years ago
Mitchell drew 56 pictures. Rafi drew p fewer pictures than Mitchell. Write an expression that shows how many pictures Rafi drew.
Angelina_Jolie [31]
This would be 56 - p because 'fewer' indicates subtraction.
8 0
3 years ago
Which of the following ( 15, 20, 30, 57 ) is the product of exactly three different prime numbers?
Andrei [34K]

Answer:

30=2*3*5, so it's 30

Step-by-step explanation:

15=3*5, so it's not 15

20=2*2*5, so it's not 20

30=2*3*5, so it's 30

57=19*3, so it's not 57

3 0
2 years ago
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