The following data relates to the scores obtained by 9 salesmen of a company in an intelligence test and their weekly sales in thousands of Rs.
Salesmen:
A
B
C
D
E
F
G
H
I
Test score :
50
60
50
60
80
50
80
40
70
Weekly sales :
30
60
40
50
60
30
70
50
60
Obtain the regression equation of sales on test scores of the salesmen and estimate sales if the test score of a salesman is 65.

Answer:

[tex]SD= 3.24[/tex]

Step-by-step explanation:

Given

[tex]Proportion, p = 30\%[/tex]

[tex]Population, n = 50[/tex]

Required

Determine the standard deviation

Standard Deviation (SD) is calculated as:

[tex]SD= \sqrt{np(1-p)}[/tex]

Substitute values for n and p

[tex]SD= \sqrt{50 * 30\% * (1-30\%)}[/tex]

Convert percentage to decimals

[tex]SD= \sqrt{50 * 0.30 * (1-0.30)}[/tex]

[tex]SD= \sqrt{50 * 0.30 * 0.70}[/tex]

[tex]SD= \sqrt{10.5}[/tex]

[tex]SD= 3.24[/tex] approximated

Answer:

225 words

Step-by-step explanation:

In order to find the answer to this question we have to find how many words she writes in 1 minute. To do this you need to divide 90 words by 4 minutes:

(90)/4 = 22.5 words/minute

Now that the words per minute is found, we can multiply it by the 10 minutes to find how many words she can write in 10 minutes:

(22.5)(10) = 225

Therefore, Sara can type about 225 words in 10 minutes.

I hope this helps!!

- Kay :)

Answer:

x = 3 ; y = 30

Step-by-step explanation:

Δ is equilateral or equiangular ⇒ m∠A = m∠B = m∠C = 60°

(2y)° = 60° ⇒ y = 30

(25x - 15)° = 60° ⇒ x = 3

Answer:

Step-by-step explanation:

You answer goes to minus infinity. There is no answer and you are correct.

Answer:

The value of the correlation coefficient would not change.

Step-by-step explanation:

If the relationship between distance of trips and fares in dollars gives a correlation coefficient value of 0.950. This can be interpreted to mean that the relationship between both variables is strong and positive such that an increase in distance leads to corresponding increase in fares of the trip and vice versa. Thus, interchanging the axis upon which the variables are plotted would still tied the same correlation Coefficient value as the correlation coefficient does not depend on the axis upon which the variables are plotted.

Step-by-step explanation:

If its change it will not be right

Answer:

196 patches

Step-by-step explanation:

We are told that the quilt is made out of square pieces that have a perimeter of 24 square inches.

This means that, length of one side = 24/4 = 6 inches.

Now since Morgan is making a square quilt with an area of 49 square feet for her nephew, let's convert 6 inches to ft.

6 inches = 6 × 1/12 = 0.5 ft

Thus, the area of a small quilt = 0.5 × 0.5 = 0.25 ft²

Number of patches = 49/0.25 = 196 patches

Answer:

7/8

Step-by-step explanation:

.25x3.5=.875

Answer: 7/8 I hope this helps

Step-by-step explanation:

3 1/2

1 3/4

7/8

Answer:

Either increase the number of acres that can be used for strawberry fields (by buying more land)..If we use the same numbers from earlier, then the farmer should use approximately 16.65 acres of land (or just 17 acres of land)

So if the farmer has 17 acres of land or more, then he will make more than $70,000 per year

Step-by-step explanation:

Use the proportions from earlier

We have the point (5, 21000)

70,000/21,000 = 3.3

To find the x-value multiply 3.3 by 5

3.3 * 5 = 16.65

We can even use the other point's values to find the exact same answer

Point (3.5, 14700)

70,000/14,700= 4.7619047619

4.7619047619 * 3.5 = 16.66 (literally about the same)

Answer:

no table

Step-by-step explanation:

Answer:

6y(1-ysquare)

Step-by-step explanation:

You have to bring out the common multiple

Answer:

36y^4

Step-by-step explanation:

6 x 6 = 36

If the variable has no exponent then it is 1.

1 + 3 = 4

I hope this helped and if it did I would appreciate it if you marked me Brainliest. Thank you and have a nice day!

Answer:

20

Step-by-step explanation:

20*3/3 = 20

The number of yards in 1 foot is 3 thus 20 packages can be wrapped.

To convert any unit into another is called a unit conversion.

In order to convert units, we need to care about their dimensions their dimension should not be changed.

As per the given,

Length of ribbon = 20 yards

Each package required = 3 feet

Since 1 yard = 3 feet so,

Each package required = 1 yard

The number of packages that can be wrapped = 20/1 = 20

Hence" The number of yards in 1 foot is 3 thus 20 packages can be wrapped".

To learn more about unit conversion,

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Answer:

27.5

Step-by-step explanation:

Answer: I got 27.5

Step-by-step explanation:

This is a fraction equal to

220 miles ÷ 8 hours

We want a unit rate where

1 is in the denominator,

so we divide top and bottom by 8

220 miles ÷ 8

8 hours ÷ 8

=

27.5 miles

1 hour

=

27.5 miles

hour

= 27.5 miles per hour

Answer:

Step-by-step explanation:

If you have to have online people help you just give up on that answer and guess

Velocity is a vector, so it has a magnitude and direction.

Speed is its magnitude, which is obtained from

|〈-3, 4〉 m/s| = √((-3 m/s)² + (4 m/s)²) = √(25 m²/s²) = 5 m/s

Its direction is an angle θ made with the positive horizontal axis, satisfying

tan(θ) = (4 m/s) / (-3 m/s) = -4/3   →   θ = arctan(-4/3) + 180°n

where n is any integer. Now you have to consider that the x coordinate is negative and the y coordinate is positive, so 〈-3, 4〉 points into the second quadrant, and we get an angle there for n = 1 of about

θ ≈ 126.87°

Alternatively, you can use the vector 〈1, 0〉 in place of the axis, then compute the angle by relating it to the dot product, so θ is such that

〈-3, 4〉 • 〈1, 0〉 = |〈-3, 4〉| |〈1, 0〉| cos(θ)

(-3)•1 + 4•0 = √((-3)² + 4²) • √(1² + 0²) cos(θ)

-3/5 = cos(θ)   →   θ = arccos(-3/5) + 360°n

where again, n is any integer, and we get the same solution θ ≈ 126.87° in the second quadrant when n = 0.

Answer:

15 chocolate chip

Step-by-step explanation:

1/4 of 20 is 5

this means there are 5 peanut butter cookies.

so 20-5= 15

this means there are 15 chocolate chip cookies

hope this helps!

Answer:

3

Step-by-step explanation:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29

(23, 7, 2)

(19, 11, 2)

(17, 13, 2)

Given:

Rate of sales tax = 7%

Marked price of an item = $19.94

To find:

The final cost of the item once tax is included.

Solution:

We have,

Rate of sales tax = 7%

Marked price of an item = $19.94

[tex]\text{Sales tax}=\dfrac{7}{100}\times 19.94[/tex]

[tex]\text{Sales tax}=1.3958[/tex]

Now, final cost of the item once tax is included is

[tex]\text{Final cost}=\text{Marked price}+\text{Sales tax}[/tex]

[tex]\text{Final cost}=19.94+1.3958[/tex]

[tex]\text{Final cost}=21.3358[/tex]

Therefore, the final cost of the item once tax is included is $21.3358.

Answer:

(x + 1 ≤ 1) ∩ (x + 1 ≥ 1) (the second option)

Step-by-step explanation:

there are no elements that are contained in all of the intervals thus making the second expression have no solution

Answer:

yo mama (first one ) .bsnisjehdvxbnxjx

Answer:

Costo  unitario= $3

Step-by-step explanation:

Dada la siguiente información:

Entrada= $4.5

Cantidad de entradas de más= 2

Cantidad de amigos que pagan= 3

Primero debemos calcular el total a pagas de más:

Total a pagar de más= 2*4.5= $9

Ahora, cuánto debe pagar cada uno:

Costo unitario= costo total / cantidad de personas

Costo unitario= 9/3

Costo  unitario= $3

Answer:

See below

Step-by-step explanation:

Given

We need to describe the transformations from f to g

The transformation steps are:

So there are four transformations:

Answer:

The distance the water is traveling and the time it took.

Step-by-step explanation:

The speed formula is s= d/t so I would guess that is what the question means.

(Sorry if I didn't take a lot of time to answer, it had caps so I would guess that you needed the answer fast. )

Answer:

simplify a power of a power by multiplying the exponents and keeping the same base.

Step-by-step explanation:

Answer:

-90=[tex]x[/tex]([tex]x[/tex]-18)

-90=[tex]x^{2}[/tex]-18[tex]x[/tex]

[tex]0=x^{2}-18x+90[/tex]

[tex]x=9+3i or 9-3i[/tex]

Step-by-step explanation:

you need to use quadratic formula and you will find square root a negative ( -9 ), which is an imaginary no.

square root (-9) = 3i

Answer:

Its a

Step-by-step explanation:

took the test egde 2021

The difference between the new, colder temperature and the original temperature is 30 ° C.

"Temperature, measure of hotness or coldness expressed in terms of any of several arbitrary scales and indicating the direction in which heat energy will spontaneously flow—i.e., from a hotter body (one at a higher temperature) to a colder body (one at a lower temperature). Temperature is not the equivalent of the energy of a thermodynamic system; e.g., a burning match is at a much higher temperature than an iceberg, but the total heat energy contained in an iceberg is much greater than the energy contained in a match. Temperature, similar to pressure or density, is called an intensive property—one that is independent of the quantity of matter being considered—as distinguished from extensive properties, such as mass or volume."

Given,

The old temperature is = 18°C

The new temperature is = -12°C

The difference in temperature is [tex](-12\°C - 18\°C) = 30\°C[/tex]

Hence, A is the correct option.

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