Please help 13 points geometry!!

Answer:

B, 24.5

Step-by-step explanation:

I just took the test

The Perimeter of the triangle is 23+2x in³

We know that formula of the Perimeter of the triangle is:
Perimeter= A+B+C
where A=(21-x)in.
B=(2x-3)in.
C=(x+5)in.

Solution:
Perimeter = (21-x)+(2x-3)+(x+5)

Perimeter = (18+x)+ (x+5)

Perimeter = 23+2x in³

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The curvature at the point (2,8,-1) X = 2t, Y = 8[tex]t^{3/2}[/tex], Z = -t² is √2/152 when the formula is k = | r'(t)×r''(t) |/||r''(t)||³.

Given that,

We have to find the curvature at the point (2,8,-1) X = 2t, Y = 8[tex]t^{3/2}[/tex], Z = -t².

We know that,

The curve is  x = 2t, y = 8[tex]t^{3/2}[/tex], z = -t².

Putting 2t=2

t=1

So,

t=1 at the point (2,8,-1)

Also r(t) = <2t, 8[tex]t^{3/2}[/tex], -t²>

r'(t) = <2, 8(3/2)√t, -2t>

r''(t) = <0,6/√t,-2>

||r''(t)|| = √(2²+(12√t)²+(-2t)

||r''(t)|| = √(4+144t+4t²)

Cross product = r'(t) × r''(t) = [tex]\left[\begin{array}{ccc}i&j&k\\2&12\sqrt{t} &-2t\\0&6/\sqrt{t} &-2\end{array}\right][/tex]

=i(-24√t+12√t)-j(-4-0)+k(12/√t-0)

=-12√ti+4j+12/√tk

| r'(t)×r''(t) |= √(-12√t)²+4²+(12/√t)² = √(144t+16+144/t)

The curvature at the point t=1 is k = | r'(t)×r''(t) |/||r''(t)||³

k = √(144t+16+144/t) /√(4+144t+4t²)³

k = √(144(1)+16+144/(1)) /√(4+144(1)+4(1)²)³

k = √304/ (152)³

k = √2/152

Therefore, the curvature at the point (2,8,-1) X = 2t, Y = 8[tex]t^{3/2}[/tex], Z = -t² is √2/152 when the formula is k = | r'(t)×r''(t) |/||r''(t)||³.

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The graph of the models the piecewise function for the given situation is attached below.

What is piecewise function?

A piecewise-defined function in mathematics is one that is composed of several smaller functions, each of which has a certain interval of the domain it applies to. Instead of being a property of the function itself, piecewise definition is a means to express the function.

Given that for the first 5 hours, 2 inches of snow fell every hour.

The height of the snow can represent by y = 2x, 0 ≤ x ≤ 5

Where x represents the time and y is the height of the snow.

The height of the snow is (5 × 2) = 10 inches after 5 hours.

After 5 hour, there is no snowfall.

The level of snow is y = 10 when 5 ≤ x ≤ 10.

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Answer:Both A and C

Step-by-step explanation:

Four friends want to take a vacation together, so each one gets a part-time job. Each person has 8 weeks to save $720 for the vacation. Analyze the four individual plans below and decide which of the four people will reach his or her goal of saving $720 for vacation.

Friend A: Works 13 hours per week at $6.95 per hour.

Friend B: Works 15 hours per week at $5.85 per hour.

Friend C: Works 18 hours per week at $5.25 per hour.

Friend D: Works 11 hours per week at $7.80 per hour.  there!

The median of the first 25 whole numbers is 12.

The median is the middle point in a dataset—half of the data points are smaller than the median and half of the data points are larger.

The data set's median is the value in the center. Put all the numbers in ascending or descending order, and then choose the middle number to determine the median. There will only be one middle integer if the number of data points is odd. If the number of data points is even, you must choose the middle two numbers, add them together, and divide by two.

The first 25 whole numbers are as follows:-

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

Here total no. of terms = n = 25 which is odd.

Therefore median = (n + 1)/2 th term

= (25 + 1)/2 th term

= 26/2 th term

= 13th term

Here, the 13th term is 12

Hence, the median of the first 25 whole numbers is 12.

Complete question: What is the median of the first 25 whole numbers?

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Answer:

[tex]x=15[/tex]

Step-by-step explanation:

[tex]3x-5=40\\3x=40+5\\3x=45\\x=\frac{45}{3} \\x=15[/tex]

The roots of polynomial x2 5x − 6 are x = 3 and x = -2.

Factor the polynomial

x2 5x − 6 = (x - 3)(x + 2)

(x - 3) = 0

x - 3 = 0

x = 3

(x + 2) = 0

x + 2 = 0

x = -2

To find the roots of the equation x2 5x - 6, we must first factor the polynomial into two terms. The equation can be factored as (x - 3)(x + 2). We then have to set each factor equal to zero. For the first factor, (x - 3) = 0. With this equation solved, we obtain x = 3. (x + 2) Equals 0 for the second factor. The answer to this problem is x = -2. As a result, x = 3 and x = -2 are the roots of x2 5x - 6.

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Yes,  3x² is a polynomial, but a special form of a polynomial with just one term which is called monomial.

Polynomial is an expression consisting of indeterminates and coefficients, that involves only the operations of addition, subtraction, multiplication, and positive-integer powers of variables

The given expression is 3x².

In the given expression three times of x square, x is the variable.

For an expression to be a polynomial term, it must contain no square roots of variables, no fractional or negative powers on the variables, and no variables in the denominators of any fractions.

Yes, this is a polynomial, but a special form of a polynomial with just one term which is called monomial.

Hence,  3x² is a polynomial.

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Answer:

(0, 6 )

Step-by-step explanation:

(x, y ) → (x - 4, y + 2 )

mans subtract 4 from the original x- coordinate and add 2 to the original y- coordinate, that is

(4, 4 ) → (4 - 4, 4 + 2 ) → (0, 6 )

Answer:

1/5 or 0.2

Step-by-step explanation:

[tex]\frac{6}{5}[/tex] multiplied by 5 or [tex]\frac{5}{1}[/tex]

[tex]\frac{6}{5}[/tex]x[tex]\frac{5}{1}[/tex]=6

so when dividing , you reciprocate the value after the division sign.

[tex]\frac{6}{5}[/tex]÷[tex]\frac{1}{5}[/tex]=[tex]\frac{6}{5}[/tex]x[tex]\frac{5}{1}[/tex]=6

therefore, "blank"= 1/5 or 0.2

The radius of X² y² 16 is 4.

X² y² 16 is a circle equation. To solve for the radius, we need to divide both sides by 4, then take the square root of both sides. So, 16/4 = 4 and √16 = 4. Therefore, the radius of X² y² 16 is 4. As a reminder, the equation for the radius of a circle is r = √(x² + y²). Therefore, when solving for the radius of a circle, the first step should be to divide both sides of the equation by 4 and then take the square root of both sides.

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Limit base x to a f(x) is equal to infinity if we can say f(x) arbitrarily large for all x sufficiently x=a, from both sides, without actually letting x=a.

Given that,

We have to find how do we know if the limit is positive infinity or a negative infinity.

We know that,

On a number line, numbers move closer to positive infinity as they advance to the left and negative infinity as they move to the right. Positive infinity is always larger than any number, while negative infinity is always smaller.

Now,

We say

Limit base x to a f(x) is equal to infinity if we can say f(x) arbitrarily large for all x sufficiently close to x=a, from both sides, without actually letting x=a.

And

Limit base x to a f(x) is equal to negative infinity if we can say f(x) arbitrarily large and negative for all x sufficiently close to x=a, from both sides, without actually letting x=a.

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Answer:

Step-by-step explanation:

The y-intercept of g(x) is 3 * -2 = -6.

To find the x-intercepts of g(x), we need to find the values of x that make g(x) equal to 0. Since g(x) = -2f(-2x), this means we need to find the values of x that make f(-2x) equal to 0. Therefore, we can find the x-intercepts of g(x) by solving the equation f(-2x) = 0 for x.

Since the x-intercepts of f(x) are at 2 and -4, this means that the equation f(x) = 0 has solutions at x = 2 and x = -4. Substituting these values into the equation f(-2x) = 0, we get:

f(-2(2)) = 0

f(-4) = 0

and

f(-2(-4)) = 0

f(8) = 0

Therefore, the x-intercepts of g(x) are at x = -2 and x = 4. These are the only intercepts of g(x) that we can determine for certain.

The probability of getting an even number on the next spin is a.) 18 over 38 because each spin is independent.

Probability is honestly how possibly some thing is to happen. Whenever we are uncertain approximately the final results of an occasion, we are able to communicate approximately the chances of positive outcomes—how possibly they are. The evaluation of occasions ruled via way of means of possibility is referred to as statistics. Probability is calculated via way of means of dividing the quantity of methods the occasion can arise via way of means of the overall quantity of outcomes. Probability and odds are one-of-a-kind concepts. Odds are the possibility that some thing occurs divided via way of means of the possibility that it would not happen.

Thus, the correct option is a.

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Answer:

48

Step-by-step explanation:

2*(L+W)

=2*(7+17)

********

Answer: 64 = 8^2.

Step-by-step explanation:

The logarithmic equation log8 64 = 2 can be rewritten in exponential form as follows:

log8 64 = 2

64 = 8^2

Therefore, the exponential form of the given logarithmic equation is 64 = 8^2.

The inverse of a number is it's reciprocal. Divide 1 by the number to obtain its reciprocal.

For example, the reciprocal of 5 is 1/5, and the reciprocal of 0.5 is 2. The reciprocal of a number x is denoted by 1/x or x^(-1).

For example, to find the reciprocal of 8, you would divide 1 by 8, like this:

1/8 = 0.125

To find the reciprocal of a fraction, you can also turn the fraction upside down to get its reciprocal. For instance, 4/3 is 3/4's inverse.

To find the inverse of a matrix, you can use the following formula:

A^(-1) = (1/det(A)) * adj(A)

where A is the matrix, det(A) is the determinant of the matrix, and adj(A) is the adjugate of the matrix. The transposition of a matrix's cofactor matrix is adjugate. The cofactor matrix is a matrix of the determinants of the minors of the original matrix, each of which is multiplied by a cofactor (-1)^(i+j). The minors of a matrix are the determinants of the square submatrices formed by deleting one row and one column from the matrix. The determinant of a matrix is a scalar value that can be computed from its elements.

For example, consider the matrix A:

[a b]

[c d]

The determinant of A is:

det(A) equals (a * d) - (b * c).

The cofactor matrix of A is:

[d -b]

[-c a]

The adjugate of A is the transpose of the cofactor matrix, so it is:

[d -c]

[-b a]

The inverse of A is then:

A^(-1) = (1/det(A)) * adj(A)

= (1/((a * d) - (b * c))) * [d -c]

[−b a]

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Learning mathematics quickly requires dedication and hard work.

What is mathematics?

Mathematics is the science of numbers, shapes, and patterns. It is used to describe and explain the physical world and to solve problems. Mathematics is a language that helps us to understand and communicate ideas. It is a tool used to organize and understand data, determine relationships, and make predictions.

According to the given question:

The first step to learning math quickly is to determine your level of understanding. It is important to identify any weaknesses in order to develop a plan to improve them. Once the strengths and weaknesses are identified, it is important to set realistic goals and to create an action plan to reach those goals.

It is also important to find a good tutor or mentor to help guide the learning process. A tutor or mentor can provide guidance, resources, and practice problems to help increase understanding of the subject. Additionally, they can help identify problem areas and provide feedback that can help improve learning.

Finally, it is important to take advantage of online resources. There are many online tutorials, websites, and videos that can help improve the learning process.

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A square pyramid's volume and base area allow figuring out its height simple. H = 3 * V / (A_b).

How to determine a square pyramid's height

H = 3 * V / (A_b)

Where:

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The solution set for the given systems of equations : 5x + 2y = 7 and y = x + 1 is x = 5/7 and y = 12/7

Solving the equations :

5x + 2y = 7                                         (1)

y = x + 1                                              (2)

Subtracting x on both sides of equation (2)

y - x = 1

Multiplying the equation by 5 on both sides

5y - 5x = 5                                          (3)

Adding equation (1) and (3) we get

5x + 2y + 5y - 5x = 7 + 5

7y = 12

y = 12/7

Solving for x by substituting y = 12/7 in (2)

12/7 = x + 1

x = 12/7 - 7/7

x = 5/7

--The question is incomplete, answering to the question below--

"What is the solution set of the given systems? 5x + 2y = 7 and y = x + 1"

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The required regression  equation for the line of best fit, where x represents the month and y-hat represents the predicted time is;

y = -2.78x + 48.5

A regression equation is defined as the equation that is used in stats to find out what relationship, if any, exists between sets of data

From the given table, let x represents the month and y represents the time. Thus;

Mean of x; x-bar = (1+2+3+4+5+6)/6 = 21/6

x-bar = 3.5

Mean of y; y-bar = (47+43+39+36+35+33)/6

y-bar = 233/6 = 38.83

∑x = 21

∑y = 233

Using statistics calculator;

Sum of squares (SSX) = 17.5

Sum of products (SP) = -48.5

The general form of a regression Equation is;

y-bar = bx-bar + a

Where;

b = SP/SSX

= -48.5/17.5

= -2.77143

a = y-bar - b(x-bar) = 38.83 - (-2.77×3.5) = 48.53333

y = -2.78x + 48.5

Thus, the required regression equation is y = -2.78x + 48.5 for the line of best fit.

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Answer:

1/ Point slope form is more efficient for determining the Slope

2/ Standard form is more efficient for determining x-intercept and

y-intercept

3/ If you want to use your calculator to graph an equation, the Point slope form is more efficient

Step-by-step explanation:

1/ I say point slope form because the slope in this form is a point on the line, and he if knows the point on the graph and slope, he can graph the line easily.

2/ I say standard form because x​ and ​y​ intercepts ​ of a graph, that is, the point where the graph crosses the ​ x-axis and the point where it crosses the ​ y ​-axis. So, it is the easiest form to find the x and y intercepts.

3/ If he knows a point and the slope he can graph it easily.

1) Given information

2) [tex]\overline{RT} \cong \overline{RT}[/tex] (reflexive property)

3) [tex]\triangle RST \cong \triangle RQT[/tex] (SSS)

4) [tex]\angle STP \cong \angle QTP[/tex] (CPCTC)

5) [tex]\overline{PT} \cong \overline{PT}[/tex] (reflexive property)

6) [tex]\triangle SPT \cong \triangle QPT[/tex] (SAS)

7) [tex]\angle SPT \cong \angle QPT[/tex] (CPCTC)

Answer:

not really

Step-by-step explanation:

Answer:

Step-by-step explanation:

y intercept = 12 the one with no x

use process of elimination

function=straight line

Answer:

n = 4

Step-by-step explanation:

You have ____ when you divide both sides of equation 3n = 12 by 3:

3n = 12

3n/3 = 12/3

n = 4

To find the value of k in a function, you need to know the equation of the function and the input values for which you want to find the output, and then substitute these values into the equation and solve for k.

A function is a relationship between each element of a non-empty set A and at least one element of another non-empty set B. Functions are the central idea of calculus in mathematics. The functions are special types of relations. A function is a rule that generates a unique outcome for each input x in mathematics.

The collection of all input values that you can use in a function without running into problems or producing undefined results is generally referred to as the domain of the function. When dealing with functions, it is crucial to keep in mind the function's domain because utilizing input values outside of the domain might provide erroneous or undefinable outputs.

To find the value of k in a function, you need to know the equation of the function and the input values for which you want to find the output.

For example, if the function is defined as f(x) = kx + b, and you want to find the value of k for a particular value of x, you can substitute the value of x into the equation and solve for k.

For example, if the function is f(x) = kx + b and you want to find the value of k when x = 2, you can substitute 2 for x in the equation to get:

f(2) = k(2) + b

Solving this equation for k gives:

k = (f(2) - b)/2

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Direct Ratios and/or Variations

Indirect proportions, inverse proportions, or variations

Thus, Inverse proportion is defined as y = k/x, k is the proportionality constant .

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The solution to the equation for x is that the equation −20x + 40 = −20x + 20 has no solution

From the question, we have the following parameters that can be used in our computation:

[tex]−20x+40=−20x+20[/tex]

Rewrite the above equation properly

So, we have the following representation

−20x + 40 = −20x + 20

Collect the like terms in the above equation

This gives

20x - 20x = 20 - 40

Evaluate the like terms in the above equation

So, we have the following representation

0 = -20

The above equation is false

Hence, the equation has no solution

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