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3 years ago

Find the value of X round your number to the nearest tenths Explain it please

Mathematics

1 answer:

Anarel [89]3 years ago

8 0

In this case, we must use trigonometry to find the value of x:

$tan(\alpha )=\frac{side-opposite-angle}{side-beside-angle} \\tan(70) = \frac{x}{3} \\3*tan(70) = x\\x = 3*tan(70)\\x = 8.24$

Thus the value of x rounded to the nearest tenth is 8.2

Hope that helps!

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Is x^2 + 1/x = 4 a quadratic equations

Liono4ka [1.6K]

Answer:

$\large\boxed{\pink{ \leadsto The \ given \ equation \ is \ not \ a \ Quadratic \ equation . }}$

Step-by-step explanation:

Given equation to us is ,

$\green{\implies x^2+\dfrac{1}{x}=4 }$

So , a equation is said to be a quadratic equation if the highest degree of the variable is 2 . On simplifying the Equation ,

$\implies x^2 +\dfrac{1}{x}=4$

Taking x as LCM ,

$\implies \dfrac{x^2.x + 1 }{x}= 4$

Transposing x to RHS .

$\implies x^3 + 1 = 4x$

Putting all terms in LHS

$\boxed{\bf \implies x^3 - 4x - 1 = 0 }$

Since here the highest degree of the variable is 3 not 2 . So its a cubic equation and not a quadratic equation .

<h3>Hence the given equation is not a quadratic equation .</h3>

4 0

3 years ago

What number divided by -7 is equal to -15?

Ilia_Sergeevich [38]

105 is the number
......

4 0

3 years ago

Will award brainliest if correct

harkovskaia [24]

for the area of the smaller semicircles

area = 1/2 x 3.142 x 5 x 5

area = 39.275cm²

for the larger circle

area = 1/2 x 3.142 x 10x 10

area= 157.1cm²

but since part of it is out and is replaced again

..total area of shaded part is 157.1cm² + 39.275cm² - 39.275cm²

area =157.1cm²

3 0

4 years ago

Find the values of x and y in the diagram below. 86° (4x - 7)° (7y - 1) (9x + 4)

Aneli [31]

The value of x in the diagram is 15° and the value of y is 6°

Please find attached the diagram used in answering this question

The figure given is a triangle. A triangle is a polygon with three sides. The sum of angles in a triangle is 180 degrees

The first step is to determine the value of x.

The value of x can be determined using the exterior angle.

The sum of the two interior opposite angles in a triangle is equal to the external angle

(4x - 7)° + 86° = (9x + 4)°

Combine similar terms

9x - 4x = 86 - 7 - 4

5x = 75

x = 15°

To determine the value of y, first substitute for the value of x in the angle (4x - 7)°

(4x - 7)° = (4x15) - 7 = 53°

The sum of angles in a triangle add up to 180°

53° + 86 + (7y - 1) = 180°

add like terms

138 + 7y = 180

7y = 42

y = 6°

To learn more, please check: brainly.com/question/23688688?referrer=searchResults

8 0

3 years ago

What is 35% divided by 200

yanalaym [24]

Answer:

0.00175

Step-by-step explanation:

5 0

3 years ago