what is trigonometry​

Answer:

None of the pairs of expressions are equal

Step-by-step explanation:

• 2n ≠ 2 +n

2n is the same as 2 times of n (expressed as a multiplication sign), while 2 +n is the addition of 2 to n.

•n² ≠ 2n

n²= n ×n

2n= 2 ×n

• 2n² ≠ (2n)²

Note that in the latter, there is a bracket which means that the square applies to both 2 and n.

(2n)²

= (2)² × n²

= (2 ×2)(n²)

= 4n²

Thus, none of the pairs of expressions are equal.

The fraction of money spent is 5 / 8 x.

The fraction of money left is 3 / 8 x.

This week Harry spent 1/2 of his pocket money on a ticket for a football match. Therefore,

let

x = amount of money he has

Therefore,

amount spent on football match = 1  /2 x

He also spent 1/8 of his pocket money on a scarf at the match.

Therefore,

amount spent on scarf = 1 / 8 x

Fraction of money spent = 1 / 2 x + 1 / 8 x = 4 + 1 / 8 = 5 / 8 x

Fraction of money left = x - 5/8 x = 8x - 5x/8 = 3 / 8 x

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Answer:

Step-by-step explanation:

[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]

Step-by-step explanation:

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If U = {1, 2, 3, …, 12} is the universal set, and

A = {1, 2, 6, 10}

B = {3, 6, 9, 10, 11}

C = {1, 2, 4, 7, 11}

then

(1) A U B is the set containing all elements from A and B,

A U B = {1, 2, 3, 6, 9, 10, 11}

(2) A ∩ B is the set of elements that are contained in both A and B,

A ∩ B = {6, 10}

(3) Unfortunately, A ∩ B U C is somewhat ambiguous. It could mean (A ∩ B) U C or A ∩ (B U C ). Then either

(A ∩ B) U C = {6, 10} U {1, 2, 4, 7, 11} = {1, 2, 4, 6, 7, 10, 11}

or

A ∩ (B U C ) = {1, 2, 6, 10} ∩ {1, 2, 3, 4, 6, 7, 9, 10, 11} = {1, 2, 6, 10}

The first interpretation is probably the intended one, since that essentially reads the set operations from left to right.

(4) A' U B is the union of A' and B, where A' is the complement of A, or all elements in U that are not in A. We have

A' = U - A = {3, 4, 5, 7, 8, 9, 11, 12}

and so

A' U B = {3, 4, 5, 6, 7, 8, 9, 10, 11, 12}

(5) We have

A U C = {1, 2, 4, 6, 7, 10, 11}

so that

(A U C )' = U - (A U C ) = {3, 5, 8, 9, 12}

(6) We have

B' = U - B = {1, 2, 4, 5, 7, 8, 12}

and so

A ∩ B' = {1, 2}

(7) Using the complements found in (4) and (6), we have

A' U B' = {1, 2, 3, 4, 5, 7, 8, 9, 11, 12}

Alternatively, we can use the fact that

A' U B' = (A ∩ B)'

and since we know from (2) that A ∩ B = {6, 10}, we end up with the same result,

(A ∩ B)' = U - (A ∩ B) = {1, 2, 3, 4, 5, 7, 8, 9, 11, 12}

(8) We have

A U B U C = {1, 2, 3, 4, 6, 7, 9, 10, 11}

so that

(A U B U C )' = {5, 8, 12}

Answer: the answer is in the screenshot

Step-by-step explanation:

The hypotenuse of each set of legs of a right triangle are:

1. 5 and 6 => √61

2. 4 and 1 => √17

3. 2 and 5 => √29

4. 9 and 12 => 15

In a right triangle, the hypotenuse is the longest side that is opposite to the right angle. The hypotenuse can be determined by finding the square root of the sum of the other two legs.

1. √(5² + 6²) = √61

2. √(4² + 1²) = √17

3. √(2² + 5²) = √29

4. √(9² + 12²) = 15

Learn more about the hypotenuse on:

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Answer:

Image result for The length of a rectangle is 3 more than five times its width. If the perimeter of the rectangle is 30 meters, find the dimensions of the rectangle.

To find the width, multiply the length that you have been given by 2, and subtract the result from the perimeter. You now have the total length for the remaining 2 sides. This number divided by 2 is the width.

Answer:

39.9 grees

Step-by-step explanation:

Since 4.2 kribs = 18 grees

Then,

1 krib = 18/4.2 grees

9.3 kribs = (18/4.2) x 9 3

9.3 kribs = 39.9 grees.

Answer:

18 / 19

Step-by-step explanation:

Divide it by 2

Answer:

No, they are co-planar.

Step-by-step explanation:

Points Q, R, X, and W are all in the plane QRXW. Planes do not have to be at ninety-degree angles (that is, straight up and down or straight to the left and right). However, the points Q, S, U, and X would not be coplanar as a plane must be a flat surface.

8(2)^2 + 8(2) + 9 = 57

your answer is 57

have a nice semester :)

Answer:

57

Step-by-step explanation:

8(2)^2 + 8(2) + 9

8×4+16+9

32+16+9=57

[tex]\\ \sf\longmapsto Area=LB[/tex]

[tex]\\ \sf\longmapsto 72=4.8L[/tex]

[tex]\\ \sf\longmapsto L=\dfrac{72}{4.8}[/tex]

[tex]\\ \sf\longmapsto L=15in[/tex]

Answer: Just find all whole number factors:

Step-by-step explanation:1x72, 2x36

                                                3x24, 4x18

                                                6x12, 8x9

Total 6 possible dimensions

Answer:

3.14 (π)

√-1

0.6

Step-by-step explanation:

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Answer:

-120

Step-by-step explanation:

(5)8x

(5)(8)(-3)

5(-24)

= -120

Hi! I'm happy to help!

To solve this, we just have to insert -3 for x. Because the 5 in parenthesis is next to the eight with no other sign, it represents multiplication. Since the eight is next to the x with no other sign, it also means multiplication.

(5)8x

(5)·8·x

We can remove the parenthesis.

5·8·x

5·8·-3

40·-3

-120

So, when x=-3, (5)8x evaluates to -120.

I hope this was helpful, keep learning! :D

Answer:

-8+10*-8

Step-by-step explanation:

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Step-by-step explanation:

Follow BODMAS rule...

-8+10×(-8)

-8-80

-88 Answer

Answer: V = 200m/21sec.

Step-by-step explanation:

1000m/105 sec = 200m/21sec

Answer:

The equation is 12x=180. You worked for 15 hours.

Step-by-step explanation:

Do 12x=180 then divide by 12. You get x=180/12. Then simplify

Answer:

$15/hr

Step-by-step explanation:

y= mx + b

180= 12h+ b

solution = 15 hrs

Answer:

12.

[tex]x = \frac{PQ-14}{3}[/tex] and [tex]x = \frac{QR + 10}{7}[/tex]

Step-by-step explanation:

Hope this helps!

Have a nice day! :-)

Answer:

x = 6

Step-by-step explanation:

If PQ = 3x + 14, QR = 7x - 10, and Q is the midpoint of PR, then PQ = QR.

[tex]PQ = 3x + 14 = QR = 7x - 10\\3x + 14 = 7x - 10\\3x + 24 = 7x\\24 = 4x\\6 = x\\x = 6[/tex]

Answer:

8 + n/25

Step-by-step explanation:

Answer:

-7 × (-6)

Step-by-step explanation:

7 × (-6) = -42

-6 × 7 = -42

-7 × (-6) = 42

-7 × 6 = -42

Answer:

[tex] - 7 + ( - 6) = 42[/tex]

I hope I helped you^_^

Answer:

720 minutes

Step-by-step explanation:

Total phone bill = $127.95

Service plan fee = $19.95

Total cost per minute = 127.95 - 19.95

= $108.00

No. of minutes used = Total cost per minute / Rate per minute

= 108.00 / 0.15

= 720 minutes

El número en cuestión es un Número Real que Racional e Infinito por causa de su Periodicidad.

Un Número Racional es un Número Real que satisface la siguiente forma:

[tex]\frac{a}{b}[/tex], [tex]\forall \,a,b \in \mathbb{Z}[/tex], [tex]b\ne 0[/tex]

Un Número Racional puede ser Positivo, Neutro o Negativo, así como un Número Entero o No Entero. En el caso de los Números No Enteros, sus equivalentes Decimales pueden ser Finitos o Infinitos, cuyo último caso se caracteriza por tener Periodicidad y que puede describirse matemáticamente como un Sumatoria infinita de Números Racionales.

Un Número Real que no puede ser representado por un Número Racional se denomina como Número Irracional.

En consecuencia, podemos concluir que el número en cuestión es un Número Real que Racional e Infinito por causa de su Periodicidad.

Invitamos a ver esta pregunta relacionada con Números Racionales: https://brainly.com/question/13851103

Answer:

[tex]take \: number = x \\ then \\ x + - 18 = 11 \\ x = 11 + 18 = 29 \\ equatio n= x - 18 = 11 \\ thank \: you[/tex]

[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]

For what values of x is the equation x² − x = 20 true?

[tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]

[tex] \sf \: x ^ { 2 } - x = 20[/tex]

Subtract 20 from both sides.

[tex] \sf \: x^{2}-x-20=0 [/tex]

To solve the equation, factor [tex]\sf\: x^{2}-x-20[/tex] using formula [tex]\sf\:x^{2}+\left(a+b\right)x+ab=\left(x+a\right)\left(x+b\right)[/tex]. To find a and b, set up a system to be solved.

[tex] \sf \: a+b=-1 \\ \sf \: ab=-20 [/tex]

As ab is negative, a and b have the opposite signs. As a+b is negative, the negative number has greater absolute value than the positive. List all such integer pairs that give product -20.

[tex] \sf1,-20 \\ \sf 2,-10 \\ \sf4,-5 [/tex]

Calculate the sum for each pair.

[tex] \sf1-20=-19 \\ \sf2-10=-8 \\ \sf 4-5=-1 [/tex]

The solution is the pair that gives sum -1.

[tex] \sf \: a=-5 \\ \sf \: b=4 [/tex]

Rewrite factored expression [tex]\sf \left(x+a\right)\left(x+b\right) [/tex] using the obtained values.

[tex] \sf\left(x-5\right)\left(x+4\right) [/tex]

To find equation's solutions, solve x-5=0 and x+4=0.

[tex] \bf \: x=5 \\ \bf x=-4[/tex]

⇨ The values of x are 5 & - 4.

Step-by-step explanation:

[tex] {x }^{2} + 14 + 48 = 0 \\[/tex]

(x+6)=0(or)(x+8)=0

x+6=0 ( or) x+8=0

x=-6 (or)x=-8

Answer:

875

Step-by-step explanation:

8 - (3 + b) = b - 9

Opening the brackets changes the symbol to it's opposite symbol, which gives us

8 - 3 - b = b - 9

By using the transposition method, we get

8 - 3 + 9 = b + b

or, 14 = 2b

or, 14/2 = b

or, 7 = b

The value of b is 7.

Complete the solution of the equation. find the value of y when x = -14.

To find the value of y we need to plug and substitute the equation if x = -14.

Answer:

A= (-6, 5)

M= (-1.5, -1)

B= (3, -7)

Step-by-step explanation:

*----------------*---------------*

A                  M                B

B has the same distance from M as A from M.