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2 years ago

Can someone pls help me with this question

Mathematics

1 answer:

jeyben [28]2 years ago

7 0

Answer:

I'll find X for you; the next step is by you.

Step-by-step explanation:

we have two similar pentagons

I will do it in 2 ways.

=> 48/4x = (x+2)/x

=> 12/x = (x+2)/x

Because of pentagons so x > 0

=> 12 = x + 2 => x = 10

k is unknown number

=> 4x = k.x and 48 = k.(x + 2) (x > 0)

=> k = 4 and 48 = 4.(x + 2)

=> 12 = x + 2 => x = 10

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Law of cosine find m<B a=11 b=12 c=17

Andrei [34K]

Cos (B) = (a^2 + c^2 -b^2) / (2 * a * c)
cos (B) = (11^2 +17^2 -12^2) / (2 * 11 * 17)
cos (B) = (121 + 289 -144) / (374)
cos (B) = 266 / 374
cos (B) = 0.7112299465
Angle B = 44.665 degrees

3 0

3 years ago

D = {x|x is a whole number}

pickupchik [31]

The given statement is true.

Step-by-step explanation:

Given sets are:

D = {x|x is a whole number}

E = {x|x is a perfect square between 1 and 9}

F = {x|x is an even number greater than or equal to 2 and less than 9}

as the sets are given in set builder notation,, we will first write the sets in set notation.

So,

D = {0,1,2,3,4,...}

E = {4,9}

F = {2,4,6,8}

Now,

EUF = {4,9} U {2,4,6,8}

= {2,4,6,8}

Hence,

The given statement is true.

Keywords: Union,sets

Learn more about sets at:

#LearnwithBrainly

4 0

3 years ago

Type the integer that makes the following subtraction sentence true: – 7 = -3

Shkiper50 [21]

4 because -7 plus 4 = 3

4 0

3 years ago

Which of the following is a valid exclusion for the algebraic expression

zheka24 [161]

Answer:

4a^2b-8ab^2

Step-by-step explanation:

3 0

3 years ago

Hi what is the answer for this?

Marat540 [252]

I believe it's A I really hope that's right

6 0

4 years ago

Read 2 more answers

Can someone pls help me with this question ​

Can someone pls help me with this question