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kaheart [24]
3 years ago
12

Determine the general solution of cos2X -7cosX -3=0​

Mathematics
1 answer:
vovikov84 [41]3 years ago
3 0

Answer:

x=2pi/3 +2pi n, 4pi/3 +2pi n for all integar of n.

Step-by-step explanation:

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how do you get the answer for 1 5 over 8 and decimal 1.625 PLZ HELP I WILL GIVE YOU 50 POINTS FOR THIS
frutty [35]
1.625 as a fraction is 1 5/8

15/8 simplified is 1 7/8

if you are using the word "and" to represent multiplication here you go:

first i would change both fractions to a mixed number

13/8×15/8=195/64
simplify

your answer would be 3 3/64

if you are using "and" to represent adding here you go:

1.625 as a fraction is 1 5/8

first i would change 1 5/8 to a mixed number:  13/8

so then add 15/8+13/8=28/8

simplify:  
28÷4=7
8÷4=2

7/2=3 1/2
  
i hope this helped
7 0
3 years ago
What is x? 400=12(x + 25)
Gnesinka [82]

Answer:

2

5

3

=

Step-by-step explanation:

thats what i got from google

4 0
3 years ago
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What is the correct way to write 6. 3×10−8 in standard notation?.
Vsevolod [243]

Answer:

I think it is .000000063

(7 zeros behind the decimal.)

Hope this helps!!!

Step-by-step explanation:

pls mark Brainliest

8 0
3 years ago
Write the following<br> as an<br> algebraic expression.<br> Subtract 3x + 6 from 8x -1.
Katen [24]

Answer:

(8x - 1) - (3x + 6)

hope this helps

6 0
3 years ago
The sum of two numbers is 40. The second number is 5 less than twice the first number. Let x represent the first number and let
butalik [34]

Answer:

Step-by-step explanation:

X+2x-5= 40

3x-5=40

+5=+5

3x=45

3x/3=45/3

X=15

3 0
3 years ago
Read 2 more answers
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