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3 years ago

Is this correct ? ..............

Mathematics

1 answer:

Valentin [98]3 years ago

8 0

Answer:

I don't know sorry.

Step-by-step explanation:

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V125BC [204]

Give instructions about sound, lighting etc

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3 years ago

Need help please help me confused

m_a_m_a [10]

Find out the degrees both triangles measures. Hope this helps

4 0

3 years ago

If x + y = 4 and x2 − y2 = 64, what is the value of (x − y)?

murzikaleks [220]

The value of (x-y) is 16

Further explanation:

We have to use the given values to find the value

Given

$x+y=4\\and\\x^2-y^2=64$

We will use:

$x^2-y^2=64$

Simplifying by using: $x^2-y^2=(x+y)(x-y)$

So,

$(x+y)(x-y)=64$

As we know that x+y=4

Putting the value in equation

$(4)(x-y)=64$

Dividing both sides by 4

$\frac{4(x-y)}{4}=\frac{64}{4}\\x-y=16$

The value of (x-y) is 16

Keywords: Algebraic formulas, Simplification

Learn more about algebraic expressions at:

#LearnwithBrainly

7 0

3 years ago

The angles of a triangle are in the ratio 3:7 :8 find them in degrees as well as in radians

Readme [11.4K]

Answer:

30, 70 and 80 degrees. or

π/6, 7π/18 and 4π/9 radians.

Step-by-step explanation:

There are 180 degrees in a triangle.

The ratio of the angles is 3 : 7 : 8

The number of parts = 3+7+8 = 18.

So the smallest angle = (3/18) * 180 = 3 * 10 =30 degrees

The other 2 angles are 7/18 * 180 = 7 * 10 =70 degrees.

and 8/18 * 180 = 8 * 10 = 80 degrees.

Converting to radians:

30 = 30 *π/180 = π/6 radians

70 = 70 * π/180 = 7π/18 radians.

80 = 80 * π/180 = 4π/9.

3 0

3 years ago

Find the missing side lengths. Write your answers in simplest radical form with the denominator rationalized. Please answer the

serious [3.7K]

Answer:

$x = 5$

$y = \frac{5}{2}\sqrt3$

Step-by-step explanation:

Required

Find x and y

From the triangle, we can see that x is the longest side (i.e. the hypotenuse)

The sin of an angle is:

$\sin(\theta) = \frac{opposite}{hypotenuse}$

The relationship between the given angle (30 degrees), x and 5/2 is:

$\sin(30) = \frac{5/2}{x}$

Cross Multiply:

$x * \sin(30) = \frac{5/2}{x} * x$

$x * \sin(30) = \frac{5}{2}$

Solve for x

$x = \frac{5}{2\sin(30)}$

$\sin(30) = 0.5$

So, the expression becomes

$x = \frac{5}{2*0.5}$

$x = \frac{5}{1}$

$x = 5$

To solve for y, we make use of Pythagoras theorem:

$x^2 = y^2 + \frac{5}{2}^2$

Substitute 5 for x

$5^2 = y^2 + \frac{5}{2}$

$25 = y^2 + \frac{25}{4}$

Solve for $y^2$

$y^2 = 25 - \frac{25}{4}$

$y^2 = \frac{100 - 25}{4}$

$y^2 = \frac{75}{4}$

Square root of both sides

$y = \sqrt{\frac{75}{4}}$

Express 75 as 25 * 3

$y = \sqrt{\frac{25 * 3}{4}}$

Split:

$y = \sqrt{\frac{25}{4}} * \sqrt3$

$y = \frac{5}{2} * \sqrt3$

$y = \frac{5}{2}\sqrt3$

5 0

3 years ago