True or false Change is always positive?

Answers

Answer 1

Answer: if this is about life false, if this is about math, also false

Step-by-step explanation:


Related Questions

help by the end of the week.

Answers

Answer:

1 ) Slope of the line

[tex]m = 2[/tex]

2 ) Equation of the line

[tex]y=2x-2[/tex]

3 ) Values of a and b

a = 5

b = 6

4 ) What is the y-coordinate when?

The y-coordinate is the vertical position of a point in terms of distance and direction along the y-axis.

In this graph, when x = 2 they y-coordinate is also 2 so it is 2 units from the y-axis.

Hope this helps! :)

Find the slope of the line that passes through the following points: (−4, 3) and (5, 4).

Answers

Answer:

The slope would be 1/9.

Step-by-step explanation:

From 3 to 4 it would be 1. From -4 to 5 it would be 9, the equation for slope is y/x so it would be 1/9.

solution

slope M =(Y' - Y)/(x' - x)

Indicated by (-4, 3) and (5 , 4)

x = -4 , x' = 5 , y = 3 , y' = 4

M = (4 - 3)/( 5 + 4)

M = 1/9 Ans

Researchers who examined health records of thousands of males found that men who died of myocardial infarction​ (heart attack) tended to be shorter than men who did not.
1) Is this an​ experiment? If​ not, what kind of study is​ it?
​2) Is it correct to conclude that shorter men are at higher risk of dying from a heart​ attack? Explain.
A. Yes, since the result is considered to be statistically significant.
B. ​No, since there may be confounding variables interfering with the​ treatment, such as patient age or weight.
C. ​No, since it cannot be determined which of the subjects will die from heart attacks in the future.
D. ​No, since there may be lurking​ variables, such as patient age or weight.

Answers

1. It is an experiment and the kind of study is the case - control study.

2. We can't conclude that shorter men are at higher risk of dying from a heart attack ad D. No, since there may be lurking variables, such as patient age or weight.

What is a case - control study?

It should be noted that a case control study is an observational study where there are two groups that are compared based on certain attribute.

It should also be noted that it's an experiment as a research was made to get some needed information about heart attack.

Lastly, we can't conclude that shorter men are at higher risk of dying from a heart attack as some other variables are missing from the information provided.

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Which triangle congruence postulate or theorem proves that these triangles
are congruent?

Answers

The Angle-Side-Angle Postulate (ASA) asserts that two triangles are congruent if their two angles and included sides are congruent with each other.

What is  Angle-Side-Angle  Postulate ?According to the definition of an angle side angle, two triangles are congruent to one another if two angles from one triangle and the side between them are, respectively, equal to two angles from another triangle and the side between them. If two triangles are congruent, thenOne triangle's three sides will be equivalent to its three sides, respectively.The three angles of one triangle will be equivalent to the three angles of the other, respectively.But we don't always need to know information about all the sides and angles of a triangle to be sure that two triangles are congruent. Let's use an example to illustrate ASA.Let's use an example to illustrate ASA. Take into account the triangles ABC and DEF:

We are given that,

BC = EF

∠B = ∠E

∠C = ∠F

We say that by ASA criterion: Δ ABC ≅ ΔDEF.

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Work out the circumference of this circle.
Take pie T to be 3.142 and give your answer to 1 decimal place.
4 cm

Answers

Answer:

25.1 cm

Step-by-step explanation:

4 * 2 * 3.142 = 25.136 = 25.1 cm

What is 6/21 + 6/7? Please help with question

Answers

Answer: 8/7 Or In Mixed Number Form 1 1/7

Step-by-step explanation: Get the common denominator which is 21 because you get 6/7 and multiply the number and denominator by 3. You will get 18/21. Now you add. 18/21 + 6/21 = 24/21. Simplify them by the greatest common factor and so I divide by 3 and get 8/7.

Hoped This Helped!

Answer:

Step-by-step explanation:

6/21 + 6/7

6/21 + 18/21

   24/21   = 1  1 / 7

6 x 3      18

____ =  __

7 x 3      21

- You need common denominators to add fractions together!!

Find the volume of a right circular cone-shaped building with a radius of 3cm and a height of 14 cm.

Answers

The volume of the right circular cone is, 131.95 cubic centimeter.

What is cone?

A cone is a smooth-tapering three-dimensional geometric object with a flat base and an apex or vertex. The base of a cone is made up of all the points on a plane other than the apex, and the apex is connected to all the other points on the base by a series of line segments, half-lines, or lines.

Here, the radius, r = 3 cm, and height h = 14 cm.

We have to find the volume of right circular cone.

Since,

Volume = [tex]\pi r^2\frac{h}{3}[/tex]

[tex]V = \pi (3)^3(\frac{14}{3})\\ V = \pi (3)(14)\\V = 42\pi \\V = 131.95 cm^3[/tex]

Hence, the volume of the right circular cone is, 131.95 cubic centimeter.

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A car rental company charges an initial fee plus an additional fee for each mile driven. The charge depends on the type of car: economy or luxury.
The charge E (in dollars) to rent an economy car is given by the function E=0.70M+11.95, where M is the number of miles driven. The charge L (in dollars)
to rent a luxury car is given by the function L-1.25M+17.30.
Let C be how much more it costs to rent a luxury car than an economy car (in dollars). Write an equation relating C to M. Simplify your answer as much as
possible.

Answers

The equation to find rent difference C from given values of E and L is 1.75M + 3.25. After adding the values of E and L.

How to calculate cost difference ?

A mathematical equation is a formula that uses the equals sign to represent the equality of two expressions. The meanings of the word equation and its translations into various languages can vary slightly.

Finding the values of the variables that result in the equality is the first step in solving an equation with variables.

Let E represent Economy

Let L represent Luxury

Let M be the number of miles driven

Let C be how much it cost to rent a luxury car than economy

E = -0.70M + 11.95

L = 1.25M + 17.30

C = L - E

C =(1.25M + 17.30) - (-0.70M + 11.95)

C = 1.25M + 17.30 + 0.70M - 11.95

collect like terms

C = 1.25M + 0.70M + 18.20 - 14.95

C = 1.95M + 3.25

The rent difference between luxury car and economy car is 1.95M +3.25 .

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Dela made 21 peanut butter sandwiches with a 12-ounce jar of peanut butter.

How many ounces of peanut butter did Dela use on each sandwich? Use any strategy to solve this problem.

Answers

Answer:

Oh this is easy

Dela made 21

all of them is 12 ounce

so to know each of them

21/12

So the answer is 1.75ounce of peanut butter per sandwich

Step-by-step explanation:

I think i got it right

Determine which set of side measurements could be used to form a right triangle.

6, 12, 60
4, 5, 7
square root of 27 comma square root of 35 comma 62
square root of 12 comma 3 comma square root of 21

Answers

Answer:

square root of 12, 3,  square root of 21

Step-by-step explanation:

a

3.5 in

b

3 in

c (hypotenuse)

4.60977 in

Area

5.25

in²

The set of side measurements  √12, 3, and √21 could be used to form a right triangle. which is the correct answer would be option (D).

What is Pythagoras's theorem?

Pythagoras's theorem states that a right-angled triangle, the square of one side is equal to the sum of the squares of the other two sides.

We have to apply Pythagoras's theorem in all the given options to find the right triangle.

As per option (A),

6, 12, 60

6² + 12² = 60²

36 + 144 = 3600

180 = 3600

This equation is not true.

As per option (B),

4, 5, 7

4² + 5² = 7²

16 + 25 = 49

41 = 49

This equation is not true.

As per option (C),

√27, √35, 62

(√27)² + (√35)² = 62²

27 + 35 = 3844

This equation is not true.

As per option (D),

√12, 3, √21

(√12)² + (3)² = (√21)²

12 + 9 = 21

21 = 21

The above equation is true and satisfies Pythagoras's theorem which means these measurements could be used to form a right triangle.

Hence, the correct answer would be an option (D).

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5. Rewrite the expression as a single logarithm. (1 point)

Answers

We can rewrite the given logarithmic expression as [tex]ln(\frac{\sqrt{x}(x-1)^3 }{\sqrt[3]({x+1})^2 })[/tex].

So option (D) is the correct answer.

What is a logarithmic expression?

A logarithmic equation is one that involves the logarithm of a variable-containing expression. To solve exponential equations, first, determine whether both sides of the equation can be written as powers of the same number.

The given logarithmic expression can be expressed as

[tex]=\frac{1}{2}\ln}\left(x\right)+3\left(\ln\left(x-1\right)-\frac{2}{9}\ln\left(x+1\right)\right)[/tex]

[tex]=\frac{\ln\left(x\right)}{2}+3\left(\ln\left(x-1\right)-\frac{2}{9}\ln\left(x+1\right)\right)[/tex]

[tex]=\frac{\ln\left(x\right)}{2}+3\ln\left(x-1\right)-\frac{2\ln\left(x+1\right)}{3}[/tex]

By using the logarithmic properties, we get

[tex]=ln(\frac{\sqrt{x}(x-1)^3 }{\sqrt[3]({x+1})^2 })[/tex]

We can rewrite the given logarithmic expression as [tex]ln(\frac{\sqrt{x}(x-1)^3 }{\sqrt[3]({x+1})^2 })[/tex].

So option (D) is the correct answer.

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What would the domain and range be for a problem like this. I can’t seem to recall how to determine them

Answers

The domain and range are [−4, 1] & [−4, 5].

What are the domain and range of a graph?

Graphs can also be used to determine the domain and range of functions. Because the domain refers to the set of possible input values, the domain of a graph includes all of the input values shown on the x-axis. The range is the set of possible output values shown on the y-axis.

We have given the graph,

The domain refers to the set of possible input values, the domain of a graph consists of all the input values shown on the x-axis.

The range is the set of possible output values, which are shown on the y-axis.

We can observe that the graph extends horizontally from −4 to the right 1.  so the domain of function h is [−4, 1].

The vertical extent of the graph is 0 to –4, so the range of function h is [−4, 5].

Therefore, the domain and range are [−4, 1] & [−4, 5].

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Which number is an integer?
2.3
0
-3/4
pi

Answers

0 is an integer number.

A number without a decimal or fractional element is known as an integer, which encompasses both positive and negative numbers, including zero.

i.e. the set of integers is

Z = {... -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, ...}

The integers do not contain any fraction or rational number.

Here,

2.3 is a fraction number so it is not an integer.

And -3/4 is a rational number and rational numbers are not integers.

And pi is irrational number

So,

This three numbers are not an integer

Now,

0 is an integer as per the definition of integers.

Hence,

0 is the integer number

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Solve the formula for t.

V=6πrt+7πr*2

t=

Answers

The unknown variable t has a value of t = (V - 7πr²)/6πr

How to determine the unknown variable?

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

Formula; V = 6πrt+7πr*2

Rewrite the formula properly

So, we have the following representation

V = 6πrt + 7πr²

Subtract the expression 7πr² from both sides of the equation

So, we have

V - 7πr² = 6πrt + 7πr² - 7πr²

Evaluate the difference

V - 7πr² = 6πrt

So, we have

6πrt/6πr = (V - 7πr²)/6πr

Evaluate

t = (V - 7πr²)/6πr

Hence, the value is t = (V - 7πr²)/6πr


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Answer:

[tex]t = \dfrac{V-7\pi r^2}{6\pi r}[/tex]

Step-by-step explanation:

V = 6πrt + 7πr²

Subtract the term without t from both sides.

V - 7πr² = 6πrt

Now you have a single term with t on the right side and two terms without t on the left side.

Switch sides.

6πrt = V - 7πr²

Divide both sides by 6πr.

[tex] t = \dfrac{V - 7\pi r^2}{6\pi r} [/tex]

6. ΔABC ≅ ΔYWZ
x=___ AC= ____ T=____ WZ= ___ WY=____
AB=____ m 7. ΔABC ≅ Δ ZYW
X=___ YZ=____ T=____ WZ=___ WY=___

Answers

6) The missing angles and lengths are; x = 14, T = 14, AB = WY = 60

7) The missing angles and lengths are; X = 7, ∠A = ∠Z =31°, T = 9, YZ = AB = 28

How to interpret congruent triangles?

6) We are told that;

ΔABC ≅ ΔYWZ

That means triangle ABC is congruent to triangle YWZ

Thus;

∠C ≅ ∠Z

5x - 4 = 66

5x = 70

x = 14

Similarly, AB = WY

5T - 10 = 4T + 4

5T - 4T = 10 + 4

T = 14

AB = 5(14) - 10

AB = 60 = WY

7) We are told that;

ΔABC ≅ ΔZYW

That means triangle ABC is congruent to triangle ZYW

Thus;

∠A ≅ ∠Z

5X - 4 = 3X + 10

2X = 14

X = 7

∠A = 5(7) - 4 = 31° = ∠Z

Similarly;

2T + 10 = 4T - 8

T = 18/2

T = 9

YZ = 4(9) - 8

YZ = 28 = AB

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Select all the solutions to the inequality 2(7x + 1) < -26
_
A. -2
B. 9
C. -7
D. 4

Answers

Answer:X<-2

Step-by-step explanation:

7x+1<-13

7x<-13-1

7x<-14

Answer:

Step-by-step explanation:

the answer is A: x<-2

Please help me this is a chaos, im giving 20 points!!

Answers

The constant of proportionality that relates the quantities x and y is 2.25.

An equation that relates the quantities is, y = 2.25x.

What is constant of proportionality?

The ratio connecting two given numbers in what is known as a proportional relationship is the constant of proportionality. Constant ratio, constant rate, unit rate, constant of variation, and even rate of change are other names for the constant of proportionality.

1) From the given table,

   4.5 / 2 = 2.25

   11.25 / 5 = 2.25

   15.75 / 7 = 2.25

2) The constant of proportionality that relates the quantities x and y is,

y / x = 2.25

3)  An equation that relates the quantities is,

y = kx,

where, k is constant of proportionality.

Here, k = 2.25

Therefore,

y = 2.25x

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If you took out a loan for $10,000 with a 2% interest rate & it was for 18 months. How much interest would pay?

Answers

The amount of interest he would pay for a  loan of $10,000 with a 2% interest rate and for 18 months is $300

Amount of money taken as a loan = $10000

The rate of interest = 2%

The time period of interest is 18 months = 1.5 year

Interst = prt/100

= 10000x 2 x 1.5/100

= 300

Therefore, the amount of interest he would pay for a  loan of $10,000 with a 2% interest rate and for 18 months is $300

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Explain the five properties of multiplication.

Answers

Distributive, commutative, associative, removing a common factor and neutral element

Consider the following scenario: P(E) = 0.4, P(F) = 0.5

a. Find P(E or F) if E and F are disjoint

b. Find P(E or F) if E and F are independent

Answers

Part (a)

The term "disjoint" is the same as "mutually exclusive".

If events E and F are disjoint, then we know that P(E and F) = 0. In other words, the two events have nothing in common. Therefore, it's impossible for them both to occur simultaneously.

P(E or F) = P(E) + P(F) - P(E and F)

P(E or F) = 0.4 + 0.5 - 0

P(E or F) = 0.9

Answer:    0.9

====================================================

Part (b)

If events E and F are independent, then P(E and F) = P(E)*P(F).

P(E or F) = P(E) + P(F) - P(E and F)

P(E or F) = P(E) + P(F) - P(E)*P(F)

P(E or F) = 0.4 + 0.5 - 0.4*0.5

P(E or F) = 0.4 + 0.5 - 0.2

P(E or F) = 0.9 - 0.2

P(E or F) = 0.7

Answer:   0.7

Determine whether the following quadratic function has a maximum or a minimum value. Then find the maximum or minimum value and where it occur:
F(x)= - 3x² + 18x + 3
Select the correct choice below and fill in the answer boxes to complete your choice.
(Simplify your answers.)
The function has a maximum value of ___ at x=____.
The function has a minimum value of ____ at x=____.

Answers

The quadratic function has a maximum value of 0 at x = 3

Maximum and Minimum Value of Quadratic Function

Here, the maximum value f(x) at x = 1 is called the absolute maximum value, global maximum or greatest value of the function f on the closed interval [0, 1]. Similarly, the minimum value of f(x) at x = 0 is called the absolute minimum value, global minimum or least value of the function f on the closed interval [0, 1].

In the function given f(x) = -3x² + 18x + 3

dy/dx = -6x + 18

For stationary values

0 = -6x + 18

6x = 18

x = 3

d²y/dx² = -6

for maximum or minimum value

d²y/dx² = -6x + 18

-6(3) + 18 = 0

The function has a maximum value of 0 at x = 3

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Using point-slope form, write the equation of the line that passes through the point (−1,4) and has a slope of −3.

step by step explanation will give 100 points pls answer fast

Answers

Answer:

y - 4 = - 3(x + 1)

Step-by-step explanation:

Point- slope form

y - y₁ = m(x - x₁), where m- slope, (x₁, y₁) - the point on the line

Given

m = - 3,(x₁, y₁) = ( - 1, 4).

Plug in to get the equation of the line

y - 4 = - 3(x - (-1)) ⇒ y - 4 = - 3(x + 1)

Answer:

Answer:

y - 4 = - 3(x + 1)

Step-by-step explanation:

Point- slope form

y - y₁ = m(x - x₁), where m- slope, (x₁, y₁) - the point on the line

Step-by-step explanation:

Find the maximum value of the function =z+8x3y subject to the following constraints.
≤+xy15≤+2xy18≥x0≥y0
Note that the ALEKS graphing calculator can be used to make computations easier.

Answers

The maximum value of the function z is 120

How to determine the maximum value of the function?

The objective function is given as

z = 8x + 3y

While the constraints are given as

x + y ≤ 15

2x + y ≤ 18

x ≥ 0 and y ≥ 0

To determine the feasible region, we simply plot the graphs of x + y ≤ 15 and 2x + y ≤ 18

And we subset the graph to where x ≥ 0 and y ≥ 0

From the graph, we have the feasible coordinates to be

(x, y) = (0, 18), (3, 12) and (15, 0)

Substitute (x, y) = (0, 18), (3, 12) and (15, 0) in z = 8x + 3y

z = 8(0) + 3(18) = 54

z = 8(3) + 3(12) = 60

z = 8(15) + 3(0) = 120

Hence, the maximum value is 120

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A toy rocket is shot vertically into the air from a launching pad 7 feet above the ground with an initial velocity of 72 feet per second. The height h, in feet, of the rocket above the ground at t seconds after launch is given by the function h(t)=-16 t²+72 t+7. How long will it take the rocket to reach its maximum height? What is the maximum height?
The rocket reaches its maximum height at ______ second(s) after launch.
(Simplify your answer.)
The maximum height reached by the object is ______feet.
(Simplify your answer.)

Answers

The time taken for the rocket to reach its maximum height as determined from the given information is; 2.25 seconds.

The maximum height reached by the toy rocket is; 88 feet.

What is the maximum height reached by the rocket?

It follows from the task content that the maximum height reached by the rocket is to be determined.

The given function is; h (t) = -16 t² + 72t + 7.

Since it follows from evaluation that; at maximum height, the rate of change of height to time is equal to 0.

Therefore; at maximum height;

h'(t) = 0

h'(t) = -32t + 72 = 0

-32t = -72

t = -72/-32

t = 2.25 seconds.

Therefore, the time taken for the rocket to reach its maximum height is; 2.25 seconds.

Also, the maximum height reached by the rocket is at; h (2.25);

h(2.25) = -16(2.25)² + 72 (2.25) + 7

= -81 + 162 + 7

= 88.

The maximum height reached is; 88 feet.

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1. Corey buys a Toyota Yaris for $15,000 at 4.1% interest rate for 6 years.

How much interest will Corey pay on his Yaris?

What is the total amount that will paid?

What is his monthly payment?

Answers

Answer:

a) $4089.55

b) $19089.55

c) $56.80

Step-by-step explanation:

a) (100 + 4.1)/100 = 1.041. So, 15000 × 1.041⁶ = 19089.55. Interest that will be paid: 19089.55 - 15000 = $4089.55 (2 dp).

b) $19089.55 (with interest and principal)

c) 4089.55/72 = $56.80

If f is a linear function for which f(4) = −13 and f(−4) = 19, find f(5). f(5) =

Answers

The value of the function f(5) is - 17.

How to solve linear function?

A linear function is a function that represents a straight line on the coordinate plane.

A linear function in slope intercept form is as follows:

y = mx + b

where

m = slopeb = y-intercept

Therefore, for the linear function,  f(4) = −13 and  f(−4) = 19.

f(5) can be found as follows;

-13  = 4m + b

19 = -4m + b

2b = 6

b = 6  /2

b = 3

-13 - 3 = 4m

-16 = 4m

m = -4

Hence,

f(5) = -4(5) + 3

f(5) = -20 + 3

f(5) = - 17

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The longest runway at an airport has the shape of a rectangle and an area of 2,304,700 square feet. This runway is 190 feet wide. How long is the​ runway?

Answers

The runway is 12,130 feet long.

To find are you have to times the two sides, in this case it's 190 X 12,130. To find the length of one of these sides you must divide the area by one known side, in this case 2,304,700/190, which means the answer is 12,130 feet

Can someone help me I have to verify the trig identities.

Answers

We have proved the given trigonometric equations by using trigonometric identities.

What are the trigonometric identities?

Pythagorean identities, reciprocal identities, sum and difference identities, and double-angle and half-angle identities are the most important trigonometric identities. We'll need to apply the sine and cosine rules to non-right-angled triangles.

For the first equation:

The given equation is

              [tex]sec(x)[sec(x)-cos(x)]+\frac{sin(x) + cos(x)}{sin(x)}-cotx=sec^2(x)[/tex]

Now simplifying the given equation, we can write

[tex]LHA= sec(x)[sec(x)-cos(x)]+\frac{sin(x) + cos(x)}{sin(x)}-cotx\\\\LHS=sec^2(x)-sec(x)cos(x)+\frac{sin(x)}{sin(x)}+\frac{cos(x)}{sin(x)}-cot(x)\\\\LHS=sec^2(x)-1+1+cot(x)-cot(x)\\\\LHS=sec^2(x)[/tex]

LHS = RHS.

Hence proved.

For the second equation:

     cos(π - Θ) + sin(π/2 + Θ) = 0

LHS = cos(π - Θ) + sin(π/2 + Θ)

      = -cosΘ + cosΘ

      = 0

LHS = RHS

Hence, we have proved the given trigonometric equations by using trigonometric identities.

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Find the matrix A of the linear transformation T from R2 to R2 that rotates any vector through an angle of 60∘ in the clockwise direction.

Answers

Any vector can be rotated via a 60 degree angle in the clockwise direction using the linear transformation from R2 to R2, and the corresponding matrix is

[tex]\left[\begin{array}{ccc}\frac{1}{2} &\frac{\sqrt{3} }{2} \\\frac{\sqrt{3} }{2}&\frac{1}{2} \end{array}\right][/tex]

What does a matrix for an angle alpha that is counter-clockwise mean?

An angle's matrix for counter clockwise rotation is

[tex]\left[\begin{array}{ccc}cos (alpha) &-sin (alpha) \\-sin (alpha)&cos (alpha)\end{array}\right][/tex]

Alpha angle matrix for a clockwise direction

Put alpha = -alpha in the matrix shown above.

The matrix above becomes

[tex]\left[\begin{array}{ccc}cos (alpha) &sin (alpha) \\sin (alpha)&cos (alpha)\end{array}\right][/tex]

if alpha = 60 degrees

The matrix above becomes

[tex]\left[\begin{array}{ccc}\frac{1}{2} &\frac{\sqrt{3} }{2} \\\frac{\sqrt{3} }{2}&\frac{1}{2} \end{array}\right][/tex]

Consequently, the matrix for the linear transformation from R2 to R2 that rotates any vector by 60∘ degrees in the clockwise direction.

is .[tex]\left[\begin{array}{ccc}\frac{1}{2} &\frac{\sqrt{3} }{2} \\\frac{\sqrt{3} }{2}&\frac{1}{2} \end{array}\right][/tex]

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Which sequence of transformations can be used to show that triangle J is congruent to triangle P?

Answers

Answer:

it's answer D

Step-by-step explanation:

because it is the angle postulate theorem

Answer:

it's answer D

Step-by-step explanation:

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