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Ugo [173]
3 years ago
13

Factor the expression completely 2x^2-18

Mathematics
1 answer:
Nastasia [14]3 years ago
8 0

Answer:

C)2(x-3)(x+3)

Step-by-step explanation:

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if there are about 3.346x10^26 molecules of water in a liter of water and the ocean is about 1.26x10^21 liters in volume, how ma
Natalka [10]

Answer: 4.21596 x 10⁴⁷

<u>Step-by-step explanation:</u>

  (3.346 x 10²⁶) (1.26 x 10²¹)

= (3.346 x 1.26) x 10²⁶⁺²¹

= 4.21596 x 10⁴⁷

8 0
3 years ago
Hi, please help if your are able please
Simora [160]
The answer is -28


hope this helps :)
(can you please mark me as brainliest?)
8 0
3 years ago
Read 2 more answers
Show that cos2x=cosx
PSYCHO15rus [73]

cos (2x) = cos x

2 cos^2 x -1 = cos x   using the double angle formula

2 cos ^2 x -cos x -1 =0

factor

(2 cos x+1) ( cos x -1) = 0

using the zero product property

2 cos x+1 =0    cos x -1 =0

2 cos x = -1       cos x =1

cos x = -1/2       cos x=1

taking the arccos of each side

arccos cos x = arccos (-1/2)         arccos cos x = arccos 1

x = 120 degrees   x=-120   degrees           x=0

remember you get 2 values ( 2nd and 3rd quadrant)

these are the principal values

now we need to add 360

x = 120+ 360n      x=-120+ 360n      x = 0 + 360n  where n is an integer


3 0
3 years ago
2y 4
Brums [2.3K]

Answer:

C

Step-by-step explanation:

C

8 0
3 years ago
Evaluate -(2^-6)(2^3) apex <br> A.-1 over 8<br> B. -8<br> C.1 over 8<br> D.8
Andrews [41]

Answer:

option c is the correct answer.

5 0
3 years ago
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