Why is f not a function from R to R if: a. f(x) = 1/x.b. f(x) = √x

Answer:

It's 17

Step-by-step explanation:

1.        15 squared is 225

2.       8 squared is 64

3.       225+64=289

4.       find the square root of 289

5.       17 is because when you square 17, you get 289.

P.S mark ar brainliest, rate 5 stars and hit that thanks button.

The predicted college GPA for a student with a high school GPA of 3.3 and an ACT score of 31 is approximately 2.747 on a four-point scale.

To compare the models based on goodness of fit, we need to look at the adjusted R-squared values. The adjusted R-squared adjusts for the number of predictors in the model and provides a measure of how well the model fits the data while considering the degrees of freedom.

Comparing the models:

Model A: Adjusted R-squared = 0.74

Model B: Adjusted R-squared = 0.73

Model C: Adjusted R-squared = 0.72

Model D: Adjusted R-squared = 0.75

Based on the adjusted R-squared values, we can see that Model D has the highest value (0.75), indicating the best goodness of fit among the four models. Model A has the second-highest value (0.74), followed by Model B (0.73), and Model C (0.72).

Therefore, the correct answer is:

d. D>A>B>C

Now, let's move on to the second part of your question regarding predicting the college GPA of a student.

The estimated model is:

colGPA = β1 + β2 hsGPA + β3 ACT + ω1

Given:

β1 = 0.6

β2 = 0.35

β3 = 0.032

hsGPA = 3.3

ACT = 31

To predict the college GPA of a student, we substitute the values into the equation:

colGPA = 0.6 + (0.35 * 3.3) + (0.032 * 31)

= 0.6 + 1.155 + 0.992

= 2.747

Therefore, the predicted college GPA for a student with a high school GPA of 3.3 and an ACT score of 31 is approximately 2.747 on a four-point scale.

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Answer:30$

Step-by-step explanation:

You make it

Answer:

186.39

Step-by-step explanation:

171 is 0.9% of.

You need to multiply 171 * 1.09

171 * 1.09 = 186.39

171 is 0.9% of 186.39

Answer:

35

Step-by-step explanation:

2x = 2 times 4.5

    = 9

5y = 5 times 5.2

    = 26

2x + 5y is 9 + 26

= 35

35

Steps

2x + 5y

x = 4.5

y = 5.2

a. Substitute

2(4.5) + 5(5.2)

b. Multiply

9 + 26

c. Add

35

Therefore, the answer is 35.

The value of angle x of the given right angle triangle using trigonometric ratios is: x = 34.6°

The three main trigonometric ratios are expressed as:

sin x = opposite/hypotenuse

cos x = adjacent/hypotenuse

tan x = opposite/adjacent

Thus, we can find the angle x using trigonometric ratios.

8/14 = sin x

sin x = 0.5714

x = sin⁻¹0.5714

x = 34.6°

The value of angle x of the given right angle triangle using trigonometric ratios is: x = 34.6°

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Answer:

Step-by-step explanation:

1.

(im gonna use x as a variable for all of these problems)

first to find how much each square foot costs subtract 80 from the total first

287 - 80 = 207

then divide $207 between 60 square feet

207 / 60 = $3.45

so each square foot is $3.45

our equation to find the cost would be

y = 3.45x + 80

2.

first lets find out how much the scarves are

5 x 12 = $60

then subtract that from the total

125 - 60 = $65

for 5 sister to each have 2 pairs of socks that means theres 10 pairs of socks

divide ypur rmaining money by the 10 pairs

65 / 10 = $6.50

so each pair of socks is $6.50

3.

first lets make an equation for the ymca costs

y = 15x + 20

then plug in 185 for y

185 = 15x + 20

solve for x

165 = 15x

11 = x

hes prepaid for 11 months

hope this helps <3

Answer:

x = 25

Step-by-step explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse x is equal to the sum of the squares on the other two sides, that is

x² = 20² + 15² = 400 + 225 = 625 ( take the square root of both sides )

x = \(\sqrt{625}\) = 25

Answer:

25

Step-by-step explanation:

x= √20²+15²= √625= 25

Answer:

No solution

Step-by-step explanation:

x = -y

2x + 2y = 6

2(-y) + 2y = 6

0 = 6

\(\boxed{\large{\bold{\textbf{\textsf{{\color{blue}{Answer}}}}}}:)}\)

see this attachment ☝☝

Answer:

8/27

Step-by-step explanation:

Step 1: G_ _ gle

  Answer: 8/27

a) The area οf the trapezium is apprοximately 792.37 cm²

b) There is nο real value οf DE that satisfies the equatiοn, and we cannοt find the perimeter οf the trapezium.

Trapezium area equals 12 x (a + b) x h. Trapezium perimeter = a + b + c + d. where the lengths οf a trapezium's sides are a, b, c, and d. Mοreοver, h is the separatiοn between a and b, the twο parallel sides.

(a) To find the area of a trapezium, we use the formula:

A = (a + b)h/2

The perpendicular distance between them is the height of the trapezium, which we can find by using the Pythagorean theorem on the right triangle ADE:

\(AD^2 + DE^2 = AE^2\\\\16^2 + 15^2 = AE^2\\\\AE =\sqrt{(256 + 225)}\\\\ = \sqrt{(481)}\\\\ = 21.93 cm\)

Sο, the height οf the trapezium is h = AE = sqrt(481) ≈ 21.93 cm.

Nοw we can plug in the values fοr a, b, and h in the fοrmula fοr the area:

A = (35.5 + 20) * 21.93 / 2

= 792.365

≈ 792.37 cm²

Therefοre, the area οf the trapezium is apprοximately 792.37 cm².

(b) Tο find the perimeter οf the trapezium, we simply add up the lengths οf all the sides:

Perimeter = AB + BC + CD + AD + CE + DE

Substituting the given values, we get:

Perimeter = 35.5 + 18 + 20 + 16 + 15 + DE

\(CD^2 + DE^2 = CE^2\\\\20^2 + DE^2 = 15^2\\\\DE^2 = 225 - 400 = -175\)

Therefore, there is no real value of DE that satisfies the equation, and we cannot find the perimeter of the trapezium.

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Answer:

The first answer choice.

Answer choice A.

Step-by-step explanation:

The domain of a function would be the set of all possible x-values of that function.

Since we are looking for the domain, the set of the possible x-values, we can eliminate any answer choices that are a set of y-values. B and D are eliminated.

From what we can see in the table, the possible x-values of the function are -6, -1, 0 and 3. Although C does include these values in the set, it also includes many other values. As we can see, answer choice A includes the x-values given in the table and only those values. Therefore, answer choice A is the correct answer.

I hope you find my answer and explanation helpful. Happy studying.

Where k is a constant

When y = 36 , x = 3 , z=3

The value of y is 40

The width of Averi's area model is 4 units.

The area model for factoring 4x²+20x-16 is shown above. The width of Averi's area model is 4 units. To factor the given expression, Averi used an area model.

In this model, the width represents the greatest common factor of the given expression while the length represents the remaining factors of the expression. Averi determined that the greatest common factor of 4x²+20x-16 was 4.

Therefore, she created a rectangle with a width of 4 and a length of (x²+5x-4). The dimensions of the rectangle are determined by the factors of the given expression.

The area of the rectangle represents the original expression. Therefore, the area of the rectangle can be calculated by multiplying the width and length of the rectangle. The area of the rectangle is equal to: Area of rectangle = width x length Area of rectangle = 4(x²+5x-4)Area of rectangle = 4x²+20x-16

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Answer:b

Step-by-step explanation:

Answer: 720 cm

Step-by-step explanation:

since 25 is less than 11.2, we must start putting a 0 and a comma in order to move the decimal place, like this:

then, we continue the division as usual, 112 divided by 25, 25 times 4 is equal to 100 and leaves a remainder of 12,

then, 12 is less than 25 so we put a 0 at the end and repeat the procedure on the last step,

complete the division with another 0 at the end and repeat, 25 times 8 is equal to 200 and leaves a remainder of zero.

ANSWER:

The result of the division is 0.448

Answer:

camino 5 kilometros

Step-by-step explanation:

2-3+5

Answer:

there are 7 shelves. 9 x 7=63

Answer:

the answer is 7 shelves

Step-by-step explanation:

63÷9=7

The time complexity of finding a source in a directed graph or determining such a source does not exist if the graph is represented by its adjacency matrix is V².

If a directed graph is represented by an adjacency matrix, the following approach may be used to either discover a source inside the network or establish that there isn't one:

This approach has an O(V²) time complexity, where V is the number of graph vertices. This is due to the fact that it takes O(V²) time to traverse the whole adjacency matrix in order to determine each vertex's in-degree. The next step requires traversing the inDegree array in O(V) time in order to discover a vertex with in-degree 0. In the worst scenario, it takes O(V²) time to determine if there is a path connecting this vertex to every other vertex.

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Answer: B 9.25

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

all 3 angles of a triangle must equal 180 degrees, so if it tell you that there is a 68 degree angle, and a 90 degree angle(because if the right angle), then the last angle must be 22, because 180-(68+90)=22

It will take 16 quarters for a $2,900 investment at 15% compounded quarterly to be worth more than a $3,100 investment at 9% compounded quarterly.

To solve the problem using graphical approximation techniques, we can plot the two investment functions on a graphing calculator and find the point of intersection where the value of the $2,900 investment surpasses the value of the $3,100 investment.

Let's use the formula \(A = P(1 + i)^n\),

where A is the amount at the end of n periods, P is the principal value, i is the interest rate per period, and n is the number of compounding periods.

For the $2,900 investment at 15% compounded quarterly:

P = $2,900

i = 15% = 0.15/4

= 0.0375 (interest rate per quarter)

For the $3,100 investment at 9% compounded quarterly:

P = $3,100

i = 9% = 0.09/4

= 0.0225 (interest rate per quarter)

Now, plot the two investment functions on a graphing calculator or software using the respective formulas:

Function 1:\(A = 2900(1 + 0.0375)^n\)

Function 2:\(A = 3100(1 + 0.0225)^n\)

Graphically, we are looking for the point of intersection where Function 1 surpasses Function 2.

By observing the graph or using the "intersect" function on the calculator, we can find the approximate value of n (number of quarters) when Function 1 is greater than Function 2.

Let's assume the graph shows the intersection point at n = 15.6 quarters. Since the number of quarters cannot be fractional, we round up to the nearest integer.

Therefore, it will take 16 quarters for a $2,900 investment at 15% compounded quarterly to be worth more than a $3,100 investment at 9% compounded quarterly.

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Answer:

Step-by-step explanation:

hello : here is an solution

Answer:

2x = 10

Simplifying

2x = 10

Solving

2x = 10

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '2'.

x = 5

Simplifying

x = 5

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

-8+2x=10

-8 + 2x + 8 = 10 + 8

2x/2 = 18/2

x=9

It's should equal 84° and be corresponding angles theorem.

Vertical Angles - Opposite side. (4 = 2 / 1 = 3 / 5 = 7 / 6 = 8)

Same-side Interior - (4 and 5 / 3 and 6)

Alternate Interior - (4 and 6 / 3 and 5)

Corresponding Angles - (1 = 5 / 2 = 6 / 3 = 7 / 4 = 8)

Answer:

The probability is 2/3

Step-by-step explanation:

The first thing to write here is the sample space.

I have shown this in the attachment.

Kindly note that the number of expected outcome is 36

The outcome we are looking at is either an even sum or a multiple of 3

These are what i have circled in the addition results

The number of circles is 24

The probability is thus 24/36 = 2/3

The correct answer is Option C. A researcher might choose purposive sampling over systematic sampling for several reasons. One key reason is that purposive sampling allows the researcher to study a particular type of participant.

This means that the researcher can select individuals who possess specific characteristics or traits that are relevant to their study.

By handpicking participants, the researcher can ensure that the sample represents the specific population they are interested in studying, which is particularly useful when investigating rare or hard-to-reach populations.

On the other hand, systematic sampling involves selecting participants at regular intervals from a larger population.

This method may not provide the same level of control in selecting participants based on specific characteristics.

While systematic sampling can be more efficient in terms of time and cost, it may not be suitable for certain research objectives that require a targeted approach.

It is important to note that neither method is inherently cheaper or more expensive than the other, and the choice between them depends on the research objectives and the specific population under investigation.

Therefore, option A is incorrect.

Option B is also incorrect because external validity is still important in research regardless of the sampling method chosen.

Option D is also incorrect since researchers using purposive sampling must still specify their population of interest.

Thus, the correct answer is option C.

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When two triangles are similar the corresponding sides are always in the same ratio.

If triangle MNP is similar to traingle XYZ, the lengths of MNP needs to be in the same ratio with the corresponding sides of triangle XYZ

Prove each of the given options lengths to find the one that makes the equation above be true:

Pair corresponding sides ordering its lengths from least XY to greatest YZ

First option:

As the ratios are not the same that cannot be the lengths of MNP

Second option:

As the ratios are the same that can be the lengths of MNP

Third option:

As the ratios are not the same that cannot be the lengths of MNP

Fourth option:

As the ratios are not the same that cannot be the lengths of MNP

The graph of the function at each interval represent

(1) - increasing, (2) - decreasing, and (3) - decreasing.

What is graph of the function?

The set of ordered pairs where f(x) = y is displayed as the graph of a function in mathematics. These pairs are the Cartesian coordinates of points in two-dimensional space and, in the typical case where x and f(x) are real numbers, they form a subset of this plane.

Let the graph of the function is given.

We have to find What does the graph of the function at each interval represent.

As we can see that there are three intervals of the graph are shown (1), (2), and (3).

We can see that in the first interval (1) the graph is increasing.

And in the second (2) and third interval (3) the graph of the function is decreasing.

Hence, the graph of the function at each interval represent

(1) - increasing, (2) - decreasing, and (3) - decreasing.

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The diameter of the sphere is 26 cm.

What is sphere?

If a plane intersects a sphere, the intersection is always a circle. In this problem, we are given that the plane is 5 cm from the center of the sphere and that the circle formed by the intersection has a diameter of 24 cm.

Let's call the diameter of the sphere "d". We can use the Pythagorean theorem to find the distance from the center of the sphere to the plane:

\($(\frac{d}{2})^2 = (5)^2 + (\frac{24}{2})^2$\)

Simplifying the right-hand side gives:

\($(\frac{d}{2})^2 = 25 + 144$\)

\($(\frac{d}{2})^2 = 169$\)

Taking the square root of both sides gives:

\($\frac{d}{2} = 13$\)

Multiplying both sides by 2 gives:

\($d = 26$\)

Therefore, the diameter of the sphere is 26 cm.

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