Can someone help me out with this question?

Options :

A) - 0.89

B.) + 0.34

C.) + 0.89

D.) - 0.34

Answer: A) - 0.89

Step-by-step explanation:

Since Dr. Hernandon has been able to establish that a strong negative relationship exists between the number of hours spent playing video games and reading fluency, hence looking through the options provided, the most suitable will be - 0.89, this is because the negative sign implies a negative correlation or association between the two variables (that is decrease in one leads to a corresponding increase in the other and vice-versa) also, the strength of correlation exists in how close the value of the correlation Coefficient is to 1 or - 1. Values closer to 1 or - 1 are strongly correlated while those closer to zero exhibits a weak association. Correlation Coefficient value of 0 implies that there is no association between both variables.

Answer:

√6

Step-by-step explanation:

The irrational numbers are all the real numbers which are not rational numbers. That is, irrational numbers cannot be expressed as the ratio of two integers.

Answer: 3

Step-by-step explanation:

For a vector-valued function

[tex]\mathbf f(\mathbf x)=\mathbf f(x_1,x_2,\ldots,x_n)=(f_1(x_1,x_2,\ldots,x_n),\ldots,f_m(x_1,x_2,\ldots,x_n))[/tex]

the matrix of partial derivatives (a.k.a. the Jacobian) is the [tex]m\times n[/tex] matrix in which the [tex](i,j)[/tex]-th entry is the derivative of [tex]f_i[/tex] with respect to [tex]x_j[/tex]:

[tex]D\mathbf f(\mathbf x)=\begin{bmatrix}\dfrac{\partial f_1}{\partial x_1}&\dfrac{\partial f_1}{\partial x_2}&\cdots&\dfrac{\partial f_1}{\partial x_n}\\\dfrac{\partial f_2}{\partial x_1}&\dfrac{\partial f_2}{\partial x_2}&\cdots&\dfrac{\partial f_2}{\partial x_n}\\\vdots&\vdots&\ddots&\vdots\\\dfrac{\partial f_m}{\partial x_1}&\dfrac{\partial f_m}{\partial x_2}&\cdots&\dfrac{\partial f_n}{\partial x_n}\end{bmatrix}[/tex]

So we have

(a)

[tex]D f(x,y)=\begin{bmatrix}\dfrac{\partial(e^x)}{\partial x}&\dfrac{\partial(e^x)}{\partial y}\\\dfrac{\partial(\sin(xy))}{\partial x}&\dfrac{\partial(\sin(xy))}{\partial y}\end{bmatrix}=\begin{bmatrix}e^x&0\\y\cos(xy)&x\cos(xy)\end{bmatrix}[/tex]

(b)

[tex]D f(x,y,z)=\begin{bmatrix}\dfrac{\partial(x-y)}{\partial x}&\dfrac{\partial(x-y)}{\partial y}&\dfrac{\partial(x-y)}{\partial z}\\\dfrac{\partial(y+z)}{\partial x}&\dfrac{\partial(y+z)}{\partial y}&\dfrac{\partial(y+z)}{\partial z}\end{bmatrix}=\begin{bmatrix}1&-1&0\\0&1&1\end{bmatrix}[/tex]

(c)

[tex]Df(x,y)=\begin{bmatrix}y&x\\1&-1\\y&x\end{bmatrix}[/tex]

(d)

[tex]Df(x,y,z)=\begin{bmatrix}1&0&1\\0&1&0\\1&-1&0\end{bmatrix}[/tex]

Answer:

4th option is the answer for first question.

4th option is the answee for second question.

Step-by-step explanation:

please mark me as a brainlist..

Answer:

9.3, 10.79

Step-by-step explanation:

Answer:

I think C

Step-by-step explanation:

It has a whole number as numerator and denominator so it is rational and it is a real number, but it is not an integer because it is a fraction.

Answer:

Rational, and Real numbers.

Step-by-step explanation:

There's a certain overlapping sequence of categorizing:

Whole #, Integers, Rational, Real.

Fractions and decimals belong in Rational, so you could say they are real as well.

Hope this helps! (sorry about it being brief)

Answer: -2/7

Step-by-step explanation:

To find the slope, you use the formula [tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex].

[tex]m=\frac{5-7}{2-(-5)} =\frac{-2}{7}=-\frac{2}{7}[/tex]

Now, we know the slope is -2/7.

30*2

60

again 2(a+b)

2(30+2)

2*32

64

Answer:

8/3 or 2 2/3, but I used 8/3

Step-by-step explanation:

got it right :)

Answer:

The answer is 2 2/3 but the fastest way to do it is 8/3.

Answer:

(C) 32

Step-by-step explanation:

This is a problem of Permutation and Combination, not probability.

This clarification is given because most questions like this are on Probability and Statistics.

The researcher has recruited 8  participants and must divide them into two groups of 4 people each.

So there's:

GROUP A - Placebo Group

GROUP B - Experimental Group

Since the experiment is on humans - distinct objects - they will have distinct identities. Assume the 8 participants are lined up according to identities 1,2,3,4,  5,6,7,8

[2+2+2+2  +2+2+2+2] × 2 = 16×2 = 32

Answer:

D.) 140

Step-by-step explanation:

Answer:

Number of chaperones = 9

Step-by-step explanation:

Given:

Total number of teacher = 2

Total people attend = 54

Find:

Number of chaperones

Computation:

Assume;

Number of chaperones = x

So,

x = [54-x] / 5

5x = 54 - x

6x = 54

x = 9

Number of chaperones = 9

Answer:

[tex]-49x^3[/tex]

Step-by-step explanation:

[tex]7x^2(-2x-5x)\\7x^2(-7x)\\7*-7(x^2x)\\7*-7x^3\\= -49x^3[/tex]

Answer:

Step-by-step explanation:

80

Answer:

It is rational

Answer:

4 and 3/5? It is irrational

Step-by-step explanation:

Its irrational because it is not a whole number, it includes a fraction, which is not a whole number.

Answer:

7 is the only prime number

Step-by-step explanation:

7 is a prime number because it has only two distinct divisors: 1 and itself (7). As a consequence, 7 is only a multiple of 1 and 7.

The prime number among the given numbers is 7.

Prime numbers are positive integers greater than 1 that have no divisors other than 1 and themselves. In other words, a prime number is a number that cannot be evenly divided by any other number except 1 and itself.

We have the numbers as 7, 33, 27 and 63.

The prime numbers are numbers that are divisible only by 1 and themselves, with no other factors.

Among the given numbers, 7 is a prime number because it is only divisible by 1 and 7.

Since 33 is divisible by 1, 3, 11, and 33.

and, 27 is divisible by 1, 3, 9, and 27.

and, 63 is divisible by 1, 3, 7, 9, 21, and 63.

Therefore, the prime number among the given numbers is 7.

Learn more about Prime Number here:

https://brainly.com/question/4184435

#SPJ2

Answer:

Yes it does

Step-by-step explanation:

Distance is equal to rate multiplied by time and the rate is how fast the car is going and how long is the time so yes it will be equal to distance.

The statement given in the question is TRUE that is "the distance covered by a car depends on how fast the car was going and on how long it has travelled"

The formula for calculating distance is expressed as;

[tex]distance=speed \times time[/tex]

From the formula we can see that:

From the highlighted point, we can see that the statement given in the question is TRUE that is "the distance covered by a car depends on how fast the car was going and on how long it has travelled"

Learn more here: https://brainly.com/question/23774048

Answer:

x = 56

Step-by-step explanation:

cross multiply. 28 times 2 and 1 times x. set them equal to each other and solve for x to get 56.

Area of a square = side^2

In this problem,

Side = 5ft

Plug 5 into the formula above

Area = 5^2 = 25ft^2

But we have to subtract the area of the circle.

Area of a circle = πr^2

r = radius

The diameter is 5 ft and the radius of a circle is diameter / 2

The radius of this circle = 2.5

Let's plug that into our formula.

Area = π(2.5)^2 = 19.63.

Let's subtract the area of the circle from the square

25 - 19.63 = 5.37 = 5.4ft^2

Answer:

D. passive

Step-by-step explanation:

Answer:

A man walking away from a lamppost with a light source h=8 m above the ground. The man is m= 2 m tall. How long is the man’s shadow when he is d=15 m from the lamppost?

Step-by-step explanation:

2/x=6/(10+x) cross multiply.

6x=2(10+x)

6x=20+2x

6x-2x=20

4x=20

x=20/4

x=5 m. is the length of the man's shadow.

Answer:

I would choose A

Step-by-step explanation:

I chose A because it's an hypotenuse because of the different sides

Answer:

∈ (mathematics) means that it is an element in the set of… For eg... x ∈ ℕ denotes that x is within the set of natural numbers. The relation "is an element of", also called set membership, is denoted by the symbol "∈".

Step-by-step explanation:

Answer:

∈ (mathematics) means that it is an element in the set of… For eg... x ∈ ℕ denotes that x is within the set of natural numbers. The relation "is an element of", also called set membership, is denoted by the symbol "∈".

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \bold{ \sf{ - 15k + 20}}}}}}[/tex]

Step-by-step explanation:

[tex] \sf{ - 5(3k - 4)}[/tex]

Distribute -5 through the parentheses

[tex] \longrightarrow{ \sf{ - 5 \times 3k - ( - 5) \times 4}}[/tex]

[tex] \longrightarrow{ \sf{ - 15k - ( - 20)}}[/tex]

[tex] \longrightarrow{ \sf{ - 15k + 20}}[/tex]

Hope I helped!

Best regards! :D

Answer:

20,000

Step-by-step explanation:

Scince 4, (a number lower than 5) is in front of the 3 (which is in the 10,000's place), 20,000 should be the answer.

Answer:

Step-by-step explanation:

f(g(x) = g(f(x)) for at least one value of x.

The composition of f and g is commutative.

f(g(0)) = 5 and g(f(-2.5)) = 5.

The graphs show that function composition is not commutative.

Answer:

A, C, D, and E

 f(g(x)) = g(f(x)) for at least one value of x.

 f(g(0)) = 5 and g(f(–2.5)) = 5.

Both f(g(x)) and g(f(x)) have the same domain.

The graphs show that function composition is not commutative.

Step-by-step explanation:

Answer:

How can I help

Step-by-step explanation:

sir you need at least put something there because i can't really see it thank you no thank you