HELP PLEASE!


What is the reason for Statement 7 of the two-column proof?

A) Angle Addition Postulate

B) Linear Pair Postulate

C) Ruler Postulate

D) Angle Congruence Postulate


Given: ∠A and ∠B are supplementary. m∠A=90°

Prove: ∠A≅∠B

The formula for the correlation coefficient is quite messy. I suggest checking some websites discussing this and am also attaching the formula how to calculate it by hand (the ∑'s mean summation over all the elements listed.

But unless your teacher does not allow using online calculators, you can use them. I used python's function to process the data in the table and the result is approximately -0.81. So that's your answer.

Negative value like -0.81 means that the variables x and y are quite "anit-correlated" meaning the value behave like opposites: when x is small, y tends to be large, and vice versa.  

Answer:

-0.81

Step-by-step explanation:

x y xy

12 6 72

13 21 273

14 14 196

6 28 168

25 2 50

31 1 31

1 67 67

Total   857

Mean 14.57142857 19.85714286 214.25

Std dev 10.37396007 23.06099572  

Cov (x,y) -75.09693878  

Correlation coefficient is obtained by the formula

r = {E(xy)-E(x)E(y)}/(std dev x )(std dev y)

From the data we find x bar=14.57 and y bar = 19.86

STd dev of x = 10.37 and y = 23.06

E(xy) = average of product x and y = 214.25

Hence substitute to get r = -0.81

Answer:

Angelica's bouquet has 7/12 pink roses.

Step-by-step explanation:

A dozen is defined to be a set of 12 in number or group pf anything. Here, in this case we have roses so a dozen of roses means '12 roses'.

5 of the roses in the bouquet are white roses, so the fraction of white roses will be 5 divided by the total number of roses i.e. 12:

White roses =  [tex]\frac{5}{12}[/tex]

Rest of the roses are pink, so we can simply subtract 5 from 12 to get the number of roses which will be 12 - 5 = 7

Or

we can subtract the fraction of white roses from 1 to get the fraction of pink roses in the bouquet:

Pink roses = [tex]1 - \frac{5}{12}[/tex] = [tex]\frac{7}{12}[/tex]

36

area of square = s²

given s = 6 , then

area = 6² = 36

Length of a side is considered to calculate area of a square. The area of a square can be defined as the number of square units needed to fill a square.  

The formula to calculate Area of square is:

                                     [tex]\rm Area\: of\:square = \rm side^2[/tex]

We need to calculate area of a square with sides [tex]\rm\\6 \:centimetres[/tex].

As per above stated formula:

Area of square is square of length of its sides.

[tex]\begin{aligned}\rm Area\:of\: square &= \rm side^2\\&= 6^2\\&= 36\end[/tex]

Therefore, the area of square with side 6 is 36.

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Answer: Option C. 8,064 pounds

Solution:

Unit weight: U=63 pounds/foot^3

Total Weight: W=?

W=U*V

Volume: V

Length: l=8 feet

Width: w=4 feet

Height: h=4 feet

V=l*w*h

Replacing the knwon values in the formula above:

V=(8 feet)*(4 feet)*(4 feet)

V=128 feet^3

Replacing in the formula of total Weight:

W=U*V

W=(63 pounds/foot^3)*(128 feet^3)

W=8,064 pounds

Final answer:

To calculate the weight of one cord of red oak, multiply the cord's volume (128 cubic feet) by the density of red oak (63 pounds/cubic foot), which results in 8,064 pounds.

Explanation:

To answer this question, we will calculate the weight of one cord of red oak by multiplying the volume of a cord by the weight per cubic foot.

Therefore, one cord of red oak weighs 8,064 pounds, which matches option C.

A and A

the equation of a parabola in vertex form is

y = a(x - h)² + k

where ( h, k ) are the coordinates of the vertex and a is a multiplier

y = - 2(x + 3)² + 2  is in this form

with vertex = ( - 3, 2)

To find the y-intercept let x = 0

y = - 2(3)² + 2 = - 18 + 2 = - 16

Similarly

y = - 2(x + 2)² + 2 is in vertex form

vertex = ( - 2 , 2)

x = 0 : y = - 2(2)² + 2 = - 8 + 2 = - 6 ← y- intercept

The ____ is used to determine the left-hand and right-hand behavior of the graph of a polynomial function.

When largest exponent of the polynomial is even and leading coefficient is positive , then left hand and right hand ends of the graph goes up

When largest exponent of the polynomial is even and leading coefficient is negative , then left hand and right hand ends of the graph goes down

When largest exponent of the polynomial is odd and leading coefficient is positive , then left hand graph goes down and right hand ends of the graph goes up

When largest exponent of the polynomial is odd and leading coefficient is negative , then left hand graph goes up and right hand ends of the graph goes down

Hence, Leading coefficient test is used to determine the left-hand and right-hand behavior of the graph of a polynomial function.

The leading coefficient test is used to determine the left-hand and right-hand behavior of the graph of a polynomial function.

The correct choice to fill in the blank is Leading coefficient test.

The leading coefficient, which is the coefficient of the highest power term in a polynomial function, helps determine the behavior of the graph. If the leading coefficient is positive, the graph will have an upward (right-hand) behavior, while if the leading coefficient is negative, the graph will have a downward (left-hand) behavior.

For example, in the polynomial function f(x) = 3x^3 - 2x^2 + 5x - 1, the leading coefficient is 3. Therefore, the graph of this function will have an upward (right-hand) behavior.

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That is 176 my friend not 42 or 414!

In △BAH and △CAK

AB = AC   (Given congruent sides of triangle)

m∠BAK = m∠CAH ( Given congruent angles)

AH = AK   (Given congruent sides of triangle)

Therefore, triangle △BAH congruent to triangle △CAK.

△BAH ≅ △CAK by (Side Angle Sngle or SAS triangle congruency postulate).

Therefore, m∠K = m∠H  (Congurent parts of the congruent triangles are congruent).

Answer:b

Step-by-step explanation:

Answer:

.86=86/100=43/50

Step-by-step explanation:

Answer:

43/50

Step-by-step explanation:

Answer:

Option 3 (7,2) is right answer.

Step-by-step explanation:

Given two equations

3x-2y=17    ... i

x-3y=1         ... ii

We can solve this by elimination.

coefficients of x are 3 and 1 with LCD = 3

Hence multiply ii equation by 3

3x-9y = 3  ... iv

3x-2y = 17  ... i

Subtract i from iv

-7y = -14

Divide by -7

y =2

Substitute in ii

x-3(2) = 1

x=7

Hence solution is (7,2)

Verify:

We can verify our solution by substituting in i and ii.

3(7)-2(2) = 17 and 7-6 =1

Verified

The function that models the total cost of the repair service as a function of the number of hours, [tex]\( h \),[/tex] is given by:  [tex]\[ C(h) = 75 + 55h \][/tex]

  In this situation, the appliance repair service charges a fixed amount of  [tex]75[/tex] for making a service call, regardless of how long the repair takes. This is the flat fee component of the cost. Additionally, the service charges [tex]55[/tex] for each hour of work performed by the technician. This is the hourly rate component of the cost.

 To model the total cost as a function of the number of hours [tex]h[/tex] that the repair takes, we start with the flat fee of [tex]75[/tex]. We then add the product of the hourly rate [tex]55\\[/tex] and the number of hours [tex]\( h \)[/tex]. This gives us the total cost function:

[tex]\[ C(h) = \text{Flat Fee} + (\text{Hourly Rate} \times h) \][/tex]

[tex]\[ C(h) = 75 + 55h \][/tex]

 Here, [tex]\( C(h) \)[/tex] represents the total cost in dollars as a function of the number of hours [tex]\( h \)[/tex] spent on the repair. The term [tex]\( 75 \)[/tex] is the fixed cost, and [tex]\( 55h \)[/tex] represents the variable cost that depends on the number of hours worked.

 This linear function correctly models the total cost of the repair service based on the given rates and the time spent on the repair.

You just have to isolate the y term for both equations so the first one would be y=31-5x because you have to subtract x from both sides.

The second one would be y=3+3x and all of that over 4 because to get the y isolated, you have to add 3x to both sides and then divide by 4 to get 4 y to just be y.

The 6th number is in the pattern 0.08, 0.4, 2, 10 is 250 because the sequence represents a geometric sequence option (B) is correct.

It is defined as the systematic way of representing the data that follows a certain rule of arithmetic.

Divergent sequences are those in which the terms never stabilize; instead, they constantly increase or decrease as n approaches infinity, approaching either infinity or -infinity.

It is given that:

The first four numbers of the pattern are shown below:

0.08, 0.4, 2, 10

The above sequence represents the geometric sequence.

The common ratio = second term/first term

The common ratio = 0.4/0.08

The common ratio = 5

The nth term of the geometric sequence:

a(n) = a(r)ⁿ⁻¹

a(n) = 0.08(5)ⁿ⁻¹

Plug n = 6 in the above expression:

a(6) = 0.08(5)⁶⁻¹

After calculating:

a(6) = 250

Thus, the 6th number is in the pattern 0.08, 0.4, 2, 10 is 250 because the sequence represents a geometric sequence.

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Answer:

0,1 and 2 on edg

Step-by-step explanation:

There isn't an unique solution to these equations. For example, for the first one, you may pick two arbitrary positive number, and fix the third so that the sum is -20.

Say that you choose 4 and 26. Their sum is 30. To reach -20, the third number must be -50.

So, 4, 26 and -50 are three numbers that sum to -20 and don't have all the same sign.

Similarly, for the second requirement, pick two negative numbers, and adjust the third.

If you choose -3 and -2, their sum is -5. So, the third must be 15. In fact, -3, -2 and 15 are three numbers that sum to 10 and don't have all the same sign.

Three integers that do not all have the same sign and that sum to -20 could be -10, -15, and 5, while three integers that do not all have the same sign and that sum to 10 could be -5, 15, and 0.

In the subject of Mathematics, an integer is a whole number that can be either positive, negative, or zero. If you're looking for three integers that do not all have the same sign and have a sum of -20, you could use -10, -15, and 5. In this case, -10 and -15 are negative, and 5 is positive. Their sum (-10 + -15 + 5) equals -20.

Similarly, to find three integers with varying signs that sum to 10, you could pick numbers like -5, 15, and 0. Here, -5 is negative, 15 is positive, and 0 is neutral. Their sum (-5 + 15 + 0) equals 10.

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According to the geometry program used to draw the triangle, the lengths of the sides add to 21.841 units*. Rounded to the nearest tenth, the appropriate answer choice is ...

... 21.8

_____

You can use your test-taking skill to choose this answer without doing a single calculation. The answer choices appear to be about rounding, not about accurate calculation of the length. The choice 21.84 tells you that is probably the value before any rounding. Then choices 22 and 21.9 are obviously incorrectly rounded. The correctly rounded answer is then 21.8.

Coordinate differences are ...

AB = (-1, 6) -(-4, 0) = (3, 6) . . . . ║AB║=√(3²+6²)=3√5

BC = (3, -1) -(-1, 6) = (4, -7) . . . . ║BC║=√(4²+7²)=√65

CA = (-4, 0) -(3, -1) = (-7, 1) . . . . ║CA║=√(7²+1²)=5√2

The sum of these lengths is about 21.8415, so rounds to 21.8.

___

* If you follow the math, you find that the final sum should be displayed using 3 decimal digits as 21.842. The error in the least-significant digit of the sum comes from rounding each length to 3 decimal digits.

So,

1400 people in total. Though, subtract 200 for the amount of extra adults. This makes 1200. Divide that by two. You get 600

You need to add 200 to the 600 to get the amount of adults. The amount of adults on board is 800.

The amount of children on board is 600.

600 plus 800 equals 1400, it makes sense. :P

To find the number of children on the ship, we can set up an equation based on the given information and solve for x. The number of children can be represented as x, and the number of adults can be represented as x + 200.

Let's use x to represent the number of children on the ship. Since there are 200 more adults than children, the number of adults can be represented as x + 200. We know that the total number of people on board is 1400, so we can set up the equation: x + (x + 200) = 1400.

Combining like terms, we get 2x + 200 = 1400. Subtracting 200 from both sides gives us 2x = 1200. Dividing both sides by 2, we find x = 600.

Therefore, there are 600 children on the ship.

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The correct answer is u/v+9/v= 9u/v

Remark

How does this poor soul survive?

Solution

Let the number of faults he has in his teens = x

1/7 of (of means multiply) those faults were there at birth.

1/7 x = 326     Solve for x by multiplying by 7

7* (1/7 x) = 326 * 7

x = 2282 is the number of faults Patrick has. Answer

[tex]\text{The formula of a perimeter of a rectangle:}\\\\P=2(w+l)\\\\\text{we have}\\w:l=3:2\to w=\dfrac{3}{2}l,\ P=55\ cm\\\\\text{substitute}\\\\55=2\left(\dfrac{3}{2}l+l\right)\\\\55=2\cdot\left(\dfrac{3}{2}l+\dfrac{2}{2}l\right)\\\\55=2\cdot\dfrac{5}{2}l\\\\55=5l\ \ \ \ \ |:5\\\\l=11\ cm\\\\w=\dfrac{3}{2}\cdot11=\dfrac{33}{2}=16.5\ cm\\\\Answer:\ b.\ 11\ cm,\ 11\ cm,\ 16.5\ cm,\ 16.5\ cm[/tex]

The answer is B hope this helped

Answer:

D) Column: In a Band, Not in a Band; Row: Play a Sport, Do Not Play a Sport

Answer: Option 'D' is correct.

Step-by-step explanation:

Since we have given that

Number of students in the band = 48

Number of students both play in the band and play a sport = 24

Number of students who are not in band and do not play a sport = 22

Total number of students = 80

so, we will make a table:

                                 In a band          Not in a band

Play a sport                  24                         10    

Don't play a sport         24                         22

-------------------------------------------------------------------------------

Total                               48                  (80-48) = 32

So, Column: In a Band, Not in a Band; Row: Play a Sport, Do Not Play a Sport.

Hence, Option 'D' is correct.

answer is

f (x) = 108. (2/3)x

Answer:

The correct graph is graph C

Step-by-step explanation:

Given that a sequence defined by the function f(x + 1) =[tex]\frac{2}{3}[/tex] f(x)

Also given that initial value is 108

i.e. f(0) = 108

Applying the recurrence formula given we get

f(0+1) = 2/3 f(0) = 2/3 (108) = 72

Hence (1,72) should be next point

Now we have

f(2) = f(1+1) = 2/3 f(1) = 2/3 (72) =48

(2,48) is next point

f(3) = f(2+1) = 2/3 f(2) = 2/3 (48) = 32

(3,32) is the next point

The graph covering all these points is the graph C

Hence answer is graph C

Answer:  b. $3,374.65

Step-by-step explanation:

The exponential equation of growth (continuously) is given by :-

[tex]y=Ae^{rx}[/tex], where A is the initial amount, r is the rate of growth ( in decimal) and x is the time period.

Given : You invest $2,500 in an account that grows 5% each year.

i.e.  A= $2,500  and r= 5%=0.05

Then, the equation model this situation will be :-

[tex]y=2500e^{0.05x}=2500(1.05)^x[/tex]

Now, At x= 6

[tex]y=2500e^{0.05\times6}\\\\\Rightarrow\ y=2500e^{0.3}=3374.64701894\approx3374.65[/tex]

Hence, the investment amount after 6 years will be $3,374.65.

The amount of the investment after 6 years is $3,374.65

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

Inital value, a = $2500

Rate of increase, r = 5%

Using the above as a guide, we have the following:

The function of the situation is

f(x) = a * (1 + r)ˣ

Substitute the known values in the above equation, so, we have the following representation

f(x) = 2500 * (1 + 5%)ˣ

So, we have

f(6) = 2500 * (1 + 5%)⁶

Evaluate

f(6) = $3,374.65

Hence, the amount is $3,374.65

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Answer:

Option A is right.

Step-by-step explanation:

For answering this question we must understand what is a function.

A function is different from mapping.

Mapping is just a subset of AxB where A and B are two sets.

But function is constrained to the point that elements of I set will have unique image in second set.

We find From the options

in option A, each of 2,-2, 5 and 7 have unique images.  Hence it is a function.

But in option B,, we find that 3 has two images 5 and 2.  i.e. 3 does not have unique image. Hence not a function.

Similarly  in option C,, we find that -3 has two images 4 and 1.  i.e. -3 does not have unique image. Hence not a function

and  in option D,, we find that 5 has two images 1 and -4.  i.e. 5 does not have unique image. Hence not a function.

Only first option is a function.

Answer:

There are two street A and L which run parallel to each other.

Suppose the point of intersection of Boulevard N and Street L is 75°south of below their intersection.

Let their point of intersection is S.

Taking a point P and Q on opposite side of L and R and T  on  opposite side of Line N,

then either ∠PSR=75° or ∠ QSR=75°

Case 1. If  ∠PSR=75°,

then  ∠PSR +  ∠PST=180°[ linear pair]

75°+ ∠PST=180°

∠PST=180°- 75°

∠PST=105°

∠QST =  ∠PSR=75°  [ Vertically opposite angles]

2. If ∠ Q S R =75°

∠ Q S R + ∠ Q S T=180°[linear pair]

75° +∠ Q S T=180°

∠ Q S T=180°-75°

∠ Q S T= 105°

∠Q SR = ∠P ST = 75° [ Vertically opposite angles]