plzzzzzzzzzzzzzzzzzzzzzzzz help ASAP

Given:

The value is [tex]\dfrac{\sqrt{2}}{2}[/tex].

To find:

The values from the given options which are equal to the given value.

Solution:

We have,

[tex]\dfrac{\sqrt{2}}{2}[/tex]

It can be written as:

[tex]\dfrac{\sqrt{2}}{2}=\dfrac{1}{\sqrt{2}}[/tex]

From the standard trigonometric table, we get

[tex]\sin 30^\circ=\dfrac{1}{2}[/tex]

[tex]\sin 45^\circ=\dfrac{1}{\sqrt{2}}[/tex]

[tex]\cos 45^\circ=\dfrac{1}{\sqrt{2}}[/tex]

[tex]\cos 60^\circ=\dfrac{1}{2}[/tex]

[tex]\tan 30^\circ=\dfrac{1}{\sqrt{3}}[/tex]

[tex]\tan 45^\circ=1[/tex]

From the above values it is clear that the value of [tex]\sin 45^\circ [/tex] and [tex]\cos 45^\circ [/tex] are equal to [tex]\dfrac{1}{\sqrt{2}}[/tex].

Therefore, [tex]\sin 45^\circ [/tex] and [tex]\cos 45^\circ [/tex] and equal to [tex]\dfrac{\sqrt{2}}{2}[/tex]. So, options B and C are correct.

Answer:

99.7% of the boys are between 54 and 84 inches tall.

Step-by-step explanation:

The heights 54 and 84 inches are 3 standard deviations away from the mean. Thus, 99.7% of the boys are between 54 and 84 inches tall.

The percentage of the boys are between 54 and 84 inches tall is 99.7%

What is percentage?

Percentage a relative value indicating hundredth parts of any quantity.

What is empirical rule?

The empirical rule or  the three-sigma rule , is a statistical rule which states that for a normal distribution, almost all observed data will fall within three standard deviations of the mean.

The empirical rule predicts that 68% of observations falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ).

From question mean(μ) = 69 in. and  standard deviation(σ)= 5 in.

(µ ± σ) = (69 ± 5)

           =64 - 74

           =68%

(µ ± 2σ) =(69 ± 10)

            =59 -79

            =95%

(µ ± 3σ) =(69 ± 15)

             =54 -84

             = 99.7%

Thus the percentage of the boys are between 54 and 84 inches tall is 99.7%

To know more about empirical rule click here

https://brainly.com/question/16643905

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Answer:

the answer is (-3,0) or 4

Step-by-step explanation:

Answer:

I think this is the answer

Answer:

x = 2 + 3y

Step-by-step explanation:

Given

3x = 6 + 9y ( divide the terms by 3 )

x = 2 + 3y

Answer:

the answer is B

because the total number of Cherries is 28

and apples 14...

so the ratio of the Cherries to the apples is 28:14

Answer: -7x + 20y + 12

Step-by-step explanation:

Answer: -7x+20y+12

Step-by-step explanation: Hope this help :D

Answer:

$30

Step-by-step explanation:

5=15

10=30

Answer:

Step-by-step explanation:

You can use ratio to solve this or use any other method you want.

P: M

5 : $15                        P = Pounds

10 : $30                     M = Money

Answer:

Step-by-step explanation:

260 * .80 = 208

260-208 = 52

Answer:

4. 15 im not sure tho :/

Step-by-step explanation:

Step-by-step explanation:

maybe try using kollabs

the first one is 4x + 12

the second one is -28 + 7y

Answer:

17.6

Step-by-step explanation:

If you add all of the digets up you get: 86

86 divided by the quanity of numbers is: 17.6

Answer:

You have done right but i didnt know the reason for this

Step-by-step explanation:

I think it will be the half of AA because point D falls in between the line AA

Answer:

(-11) and (-4y)

Step-by-step explanation:

Whenever a question has a - sign it always has to be re-written into an addition expression. For example

-7-9

You have to change it into...

-7+(-9) because you can't solve and integer expression with a subtraction sign, it'll be wrong.

Answer:

false ................................

Answer:

false

Step-by-step explanation:

Answer:

x = 6

Step-by-step explanation:

Tip: You want to isolate the x-variable on one side of the equation to find its value.

1) First, get rid of the radical signs on both sides of the equation by squaring both sides. This should leave you with 5x-7 = 3x+5.

2) Get the x-variables on one side by subtracting 3x from both sides, so the equation should be 2x-7=5.

3) Solve for x by adding 7 to both sides, so that your equation looks like this: 2x = 12.

4) Divide both sides by 2 and you will get x = 6. You can verify 6 as the x-value by plugging 6 back into the original equation.

I hope that helps! :)

Answer:

x=6

Step-by-step explanation:

Answer:

5 meters bc you just multiply it by 2

Answer:

7

Step-by-step explanation:

9d=67-4

d=63/9

d=7

Answer:

d = 7

Step-by-step explanation:

9d + 4 = 67

9d = 67 - 4

9d = 63

9d ÷9 = 63 ÷ 9

d = 7

brainliest is appreciated

Answer:

Radius:2

Diameter:4

Area:12.56

Circumference: 12.56

Step-by-step explanation:

a 12 miles per hour * 45/60 = 9 miles

b I mean he can't ride negative speed, unless he's going backwards??

-8 * 45/60 = -6 miles

c they would be abs(-6) + 9 = 15 miles apart

Answer:

B 4

Step-by-step explanation:

Can A is 8 x 8π, or 64π, where the radius 4 was multiplied by 2 to get diameter and then by π to get length of can.

Can B is 4 x 4π, or 16π, where the radius of 2 is multiplied by 2 to get diameter and then by π to get length of can.  

Can B can be painted 4 times over to paint same amount as Can A.

Answer:

jingle bell Rock Moana lolil

Answer: 17.5%

Step-by-step explanation:

Percentage of chips given to Jackie = 20%

Percentage of chips given to Ronald = 20%

Percentage of chips given to Mark = 1/4 × 100 = 25%

From the above calculation, we can see that Ms Johnson has given out ((20% + 20% + 25%) = 65% worth of chips out. The percentage she'll have left will be:

= 100 - 65

= 35%

Since Susan takes half of what's left, the percent that Ms. Johnson has left to eat will be:

= 1/2 × 35%

= 17.5%

She has 17.5% left to eat.

Answer:

common ratio=t2/t1

=6/(-2)

=-3

Answer:

32

Step-by-step explanation:

Pythagorean theorem

[tex]a^{2} + b^{2} =c^{2}[/tex]

a = perpendicular

b = base

c = hypotenuse

we have to find the hypotenuse

so,

[tex]13^{2} + 29.25^{2} = c^{2} \\169 + 855.6 = c^{2}\\1024.6 = c^{2}\\\sqrt{1024.6} = \sqrt{c^{2}} \\c = 32[/tex]

Answer:

(4, 4)

Step-by-step explanation:

Answer:

16

Step-by-step explanation:

Using the formulas

A=πr2

d=2r

Solving forA

A=1

4πd2=1

4·π·162≈201.06193