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3 years ago

Find the value of x. Round your answer to nearest tenth.

Mathematics

2 answers:

victus00 [196]3 years ago

4 0

Answer: 27.3 degrees

cos x = 16/18

x = arccos(16/18)

x = 27.3 degrees

sineoko [7]3 years ago

4 0

Value of x is 30°

Step-by-step explanation:

Step 1: Find value of x by using the trigonometric ratio cosine of x. Here, given that adjacent side is 16 and hypotenuse is 18

cos x° = adjacent side/hypotenuse = 16/18 = 8/9

x° = cos inverse(8/9) = 27.12° = 30° (Rounded off to nearest ten)

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Y = x + 2 y = 2x - 5 what is x and y

lana66690 [7]

Answer:

x= 7 y= 9 (7,9)

Step-by-step explanation:

solve by using system if equations. multiply top answer by 2, giving u 2y=2x+4 and y=2x-5 subtract the equations. y=9 (the x cancels out) then put 9 in for y. 9=x+2. subtract 2. giving u 7. and now x =7

7 0

2 years ago

30% of ________is $75?

Helga [31]

The answer to this is 250.

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3 years ago

I need help answering the question in the picture provided

adoni [48]

answer:

(a).

Equation of circle is x² + y² - 25 = 0

(b).

(-5, 0) » yes

(√7, 1) » no

(-3, √21) » no

(0, 7) » no

Step-by-step explanation:

(a).

If centred at origin, centre is (0, 0)

General equation of circle:

${ \boxed{ \bf{ {x}^{2} + {y}^{2} + 2gx + 2fy + c = 0}}}$

but g and f are 0:

${x}^{2} + {y}^{2} + c = 0 \\ but : \\ c = {g}^{2} + {f}^{2} - {r}^{2} \\ c = { - 25}$

8 0

3 years ago

Find the measure of c in each figure below using the side lengths given

kiruha [24]

Answer:

Step-by-step explanation:

take angle C as reference angle

using cos rule

cos C=adjacent/hypotenuse

cos C=21/75

cos C=0.28

C= $cos^{-1}$ 0.28

C=73.7 degree

3 0

3 years ago

Caroline earns $54 babysitting for 6 hours

Lady_Fox [76]

It would be $9 per hour all you have to do is divide 54 by 6 you get 9, unit rate is 1

I hope this helps

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3 years ago