is this right, be fr please​

The z-score for data item 56, with a mean of 60 and a standard deviation of 4, is -1.

Option B is the correct answer.

We have,

To convert a data item to a z-score, you can use the formula:

z = (x - μ) / σ

Where:

z = z-score

x = data item

μ = mean

σ = standard deviation

In this case, the data item (x) is 56, the mean (μ) is 60, and the standard deviation (σ) is 4.

Plugging these values into the formula.

z = (56 - 60) / 4

z = -4 / 4

z = -1

Therefore,

The z-score for data item 56, with a mean of 60 and a standard deviation of 4, is -1.

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Answer:

Z-score = 0.9450

Step-by-step explanation:

Step(i):-

 mean height of pine tree (x₁⁻) = 52

standard deviation of pine tree σ₁ = 3

Mean height of Jupiter tree ((x₂⁻) = 22

standard deviation of Jupiter tree  σ₂ = 5

Size of first sample n₁ = 48

size of second sample n₂ = 33

Step(ii):-

Z-score

               [tex]Z = \frac{x^{-} _{1} -x^{-} _{2} }{\sqrt{\frac{S.D^{2} }{n_{1} }+\frac{S.D^{2} }{n_{2} }} }[/tex]

              [tex]Z = \frac{52 -22 }{\sqrt{\frac{3^{2} }{48 }+\frac{5^{2} }{33 }} }[/tex]

             Z = 0.9450

Answer:

C

Step-by-step explanation:

So I don’t know if you don’t know how to do it but imagine right to explain it ... You good have to add oh yeah P2 together and all numbers together and all the p together see this is why I did use different colors. Have an amazing day :)

Answer:

im pretty sure it should be 4 x (2 x 6)=

if the answer is needed its 48

Step-by-step explanation:

Answer:

it's 4(3y-4)

Step-by-step explanation:

shout out to jazzy6805 for correcting me

Answer:

4(3y-4)

Step-by-step explanation:

sorry if wrong

Answer:

cccc

Step-by-step explanation:

it is correct on edge

The expected test score for a student who did not study is 40.

Option C is the correct answer.

We have,

Given that the line on the graph passes through the points (2.5, 60) and (5, 80), we can use this information to estimate the expected test score for a student who did not study.

Let's calculate the slope of the line using the two given points:

Slope = (change in y)/(change in x)

= (80 - 60)/(5 - 2.5)

= 20/2.5

= 8

The slope of the line is 8, which indicates that for every additional hour spent studying, the test score increases by 8 points.

Since we are looking for the expected test score for a student who did not study (0 hours spent studying), we can substitute x = 0 into the equation of the line to find the corresponding y value (test score).

y = mx + b (where m is the slope and b is the y-intercept)

Using the given points, we can find the y-intercept (b) by substituting one of the points into the equation:

60 = 8(2.5) + b

60 = 20 + b

b = 60 - 20

b = 40

The equation of the line is y = 8x + 40.

Now, substitute x = 0 into the equation to find the expected test score:

y = 8(0) + 40

y = 0 + 40

y = 40

Thus,

The expected test score for a student who did not study is 40.

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Answer:

ching chon me no fresnh lol

Step-by-step explanation:

ching chon me no fresnh lol

ching chon me no fresnh lol

Answer:

I need to know the options to be able to answer

Edit your answer and attach the option and I'll gladly help you

May I have brainliest please? :)

Answer:

the alternate angle is angle 2

Answer:

2

Step-by-step explanation:

Alternate interior angles are two angles that are on opposite sides of the transverse and on the inner (interior) side of the two parallels.

Answer:

Step-by-step explanation:

If it is parallel with the line 2x-3y=9

Both of them have same slope so

2x-3y=9 turn this into slope intercept form first

-3y=9-2x

Y=9/-3 + -2x/-3

Y=2/3x - 3 the slope of this equation is ⅔

So our new equation will be

Y=⅔x +b

Since (6,7)

On the line

6=⅔(7)+b

b= 6-14/3=4/3

Y=⅔x+4/3 (slope intercept form)

3y-2x=4 ( general equation of line )

The equation of the line that passes through the point (6, 7) and is parallel to the line 2x - 3y = 9 is 3y -2x = 19

The equation of a line in point slope form is expressed as

y-y0 = m(x-x0)

m is the slope of the line

(x0, y0) is the point on the line.

Given the equation 2x - 3y = 9

Rewrite in standard form y = mx + b

-3y = -2x + 9

y = 2/3 x - 3

Compared with the standard, the slope of the line is 2/3

Substitute the slope and the point into the point slope equation.

y - 7 = 2/3 (x - 6)

3(y-7) = 2(x-6)

3y - 21 = 2x - 2

3y - 2x = 19

Hence the equation of the line that passes through the point (6, 7) and is parallel to the line 2x - 3y = 9 is 3y -2x = 19

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Answer:

7

Step-by-step explanation:

\underline{\text{Solution Method 2:}}

Solution Method 2:

​

Use original formula

a^2=b^2+c^2-2bc\cos A

a

2

=b

2

+c

2

−2bccosA

From reference sheet.

\text{Since we are finding }\angle M\text{,}

Since we are finding ∠M,

\text{plug in }2.3\text{ for side }a:

plug in 2.3 for side a:

Opposit the angle we want

2.3^2 = 6.6^2+8.7^2-2(6.6)(8.7)\cos M

2.3

2

=6.6

2

+8.7

2

−2(6.6)(8.7)cosM

Plug in values. Side "a" is opposite the wanted angle.

5.29 = 43.56+75.69-114.84\cos M

5.29=43.56+75.69−114.84cosM

Square sides.

5.29 =

5.29=

\,\,\color{white}{-} 119.25-114.84\cos M

−119.25−114.84cosM

Add.

-119.25=

−119.25=

\,\,-119.25

−119.25

-113.96=

−113.96=

\,\,-114.84\cos M

−114.84cosM

\frac{-113.96}{-114.84}=\cos M

−114.84

−113.96

​

=cosM

Divide to solve for cos(A).

M= \cos^{-1}(\frac{-113.96}{-114.84})\approx7.098\approx 7^{\circ}

M=cos

−1

(

−114.84

−113.96

​

)≈7.098≈7

∘

The angle according to the given data about the triangle will be equal to 7°.

An angle results from the intersection of two lines at a point. The term "angle" describes the width of the "gap" that exists between these two rays. It's represented by the symbol ∠.

Angles are most frequently measured in degrees and radians, a measurement of roundness or rotation. Angles are a part of everyday existence.

As per the given information in the question,

The length of the sides is given as:

l = 8.7 cm

m = 2.3 cm

n = 6.6 cm

Use the formula given below to find the angle,

a² = b² + c² - 2bc cos A

The formula modified to the information will be,

m² = n² + l² - 2nl cos M

2.3² = 6.6² + 8.7² - 2(6.6)(8.7)cos M

5.29 = 43.56 + 75.69 - 114.84 cos M

-119.25 + 5.29 = -114.84 cos M

cos M = 113.96/117.84

M = cos⁻¹ 0.992

M = 7.09 ≈ 7°.

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Answer:

hablan español es que yo les pudiera ayudar pero no se tanto ingles como ustedes

Answer:

Radius

Step-by-step explanation:

The radius is a straight line from the center to the circumference of a circle

The diameter is a straight line, from circumference to circumference, that passes throught a citcle's center

Answer:

100 students

Step-by-step explanation:

Answer:

100 Students

Step-by-step explanation:

[tex]\frac{250*40}{100} =100 students[/tex]

Answer:

it is not a function

Step-by-step explanation:

Its not a function because the number 3 in the input is being repeated, and when a domain number is repeated its not a function

Answer:

16

Step-by-step explanation:

2(6 + 3)-2

2x6=12 and 2x3=6

(12+6)-2

12+6=18

18-2=

16

Answer:

29/40

Step-by-step explanation:

Answer:

The camera is sold for $ 59.26.

Step-by-step explanation:

From the statement we understand that the new price of the camera ([tex]C'[/tex]) is calculated by:

[tex]C' = \frac{C_{o}}{\left(1+\frac{r}{100} \right)}[/tex] (1)

Where:

[tex]C'[/tex] - Price after increase, measured in US dollars.

[tex]r[/tex] - Increase rate, expressed in percentage.

If we know that [tex]C_{o} = 80\,USD[/tex] and [tex]r = 35[/tex], then the new price of the camera is:

[tex]C' = \frac{80\,USD}{1+\frac{35}{100} }[/tex]

[tex]C' = 59.26\,USD[/tex]

The camera is sold for $ 59.26.

z would be 115. you know that one angle is 65, so you'd subract 65 from 180, leaving you with an answer of 115. please mark brainliest and have a great day.

Answer:

-250 attendees or you owe 250 attendees

Step-by-step explanation:

Decrease means negative or subtracting of something.

So a decrease of 250 attendees is -250  

Answer:eita moçaa

Stedssfsdsvbg´xclmvb´zdmfbhd

da

Answer:

X = 38° and w = 65°.

Step-by-step explanation:

Hey there!

Looking through figure, we get;

(3x + 1)° = (2x + 9)° + 30° { Exterior angle of triangle is equal to the sum of opposite adjacent interior angles}

(3x + 1)° = 2x + 9° +30°

or, 3x - 2x = 39° - 1°

x = 38°

X = 38°

Therefore, x = 38°

For w:

(3x + 1)° + w = 180° (being linear pair)

(3*38+1 )°+ w = 180°

115°+ w = 180°

w = 180° -115°

Therefore, w = 65°

Hope it helps...

Answer:

 y = -2x - 14

Step-by-step explanation:

Slope intercept form: y = mx + b

2x + y = - 14

      y = -2x - 14

Answer:

-840

Step-by-step explanation:

"Product" means to multiply, so you multiply -24 by 35. Since -24 has a negative, negative times a positive will equal a negative number.

(Negative times negative is positive.)

(Negative times positive is negative.)

(Positive times positive is obviously positive.)

Using these simple rules, we can do this:

Simply multiply -24 by 35, or you can multiply 24 by 35 which is 840, but DON'T forget to put a negative symbol!

Hope this helps! Let me know if there is anything else.

Answer:

1. 78%

2. 16

Step-by-step explanation:

35 + 10 = 45

Danny got 35/45 answers correct.

Divide 35 into 45

35 ÷ 45 = .777777778

.777777778 ≈ .78

To convert a decimal to a percentage, move the decimal point two spaces behind.

.78 = 78%

Danny got 78% of the answers correct.

80% = .8 = [tex]\frac{8}{10}[/tex]

Multiply [tex]\frac{8}{10}[/tex] by 20 to get the answer

[tex]\frac{8}{10}[/tex] × [tex]\frac{20}{1}[/tex] = [tex]\frac{160}{10}[/tex]

Simplify

[tex]\frac{160}{10}[/tex] = 16