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egoroff_w [7]
3 years ago
6

Please help asap!! 50 points!!!!!!

Mathematics
2 answers:
kicyunya [14]3 years ago
6 0

Answer:

1

Step-by-step explanation:

{5x}^{4}  +  {7x}^{3}   - 2  {x}^{2}  - 3x + c \div (x + 1) \\  = (5 {x}^{3} + 2 {x}^{2}   - 4x + 1)(x + 1) + c - 1 \\  \\ c - 1 = 0 \\ c = 1

fgiga [73]3 years ago
6 0

Answer:

ok

Step-by-step explanation:

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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
Find the bearing of the ship. Round to the nearest tenth of a degree if necessary.
adelina 88 [10]

9514 1404 393

Answer:

  117°

Step-by-step explanation:

We assume you want to report your bearing as an angle measured CW from North. For conventional angles greater than 90°, it will be ...

  450° -angle = 450° -333° = 117°

The bearing of the ship is 117°.

4 0
2 years ago
ARE YOU GOOD AT GEOMETRY?? THEN ANSWER THIS QUESTION WHAT ARE YOU WAITING FOR?????? ITS CROSS SECTIONSSSSS.. ALL HELP APRECIATED
Gelneren [198K]

Answer:

i think it's figure two because it has a circle at the bottom but im not too sure

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The sides of a quadrilateral are x,x+3,x+4,x+5. it’s perimeter is 52, find the lengths of the sides
wariber [46]

Answer: 10 , 13 , 14 , 15

Step-by-step explanation:

To find the perimeter of a quadrilateral , we will add all its side , that is

Perimeter = x + x + 3 + x + 4 + x + 5

That is

52 = x + x + 3 + x + 4 + x + 5

52 = 4x + 12

subtract 12 from both sides

40 = 4x

divide through by 4

x = 10

therefore , the lengths of the sides are

10 , 10+3 , 10 + 4 , 10 + 5 , that is

10 , 13 , 14 , 15

4 0
3 years ago
Here are 15 cards, numbered 1 through 15. if you pick a card, what is the probability that you choose an odd number or a two?
kondor19780726 [428]
9/15. There are 15 cards and 8 of them are odd and 1 is a 2. 
5 0
3 years ago
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