1.
What is the average rate of change between
the points (3,9) and (5, 15)?

As a result, the angles with a common reference angle of 150° in each quadrant are as follows: 210° in the first quadrant, 330° in the second, 30° in the third, and 150° in the fourth (which is equivalent to 510°).

An angle is created by combining a set of beams (half-lines) with the same shared terminal. The angle's vertex is the latter, while the rays are alternately referred to as both the angle's leg and its arms.

By deducting 210° from 360° and obtaining the exact value of the result, one may get the reference angle:

Angle of reference = |360° - 210°| = 150°

We may add or subtract multiples of 360° or 180° as necessary to determine angles in each quadrant with such a common reference angle of 210°.

First Quadrant:

By deducting 150 degrees from 360 degrees, one can find an angle for the first quadrant with such a reference angle of 150 degrees:

θ = 360° - 150° = 210°

Second Quadrant:

An angle in the second quadrant with a reference angle of 150° is found by adding 150° to 180°:

θ = 180° + 150° = 330°

Third Quadrant:

By deducting 150 degrees from 180 degrees, one can find an angle inside the third quadrant using a reference angle of 150 degrees:

θ = 180° - 150° = 30°

Fourth Quadrant:

Addition of 150 degrees to 360 degrees yields an angle inside the fourth quadrant with such a reference angle of 150 degrees:

θ = 360° + 150° = 510°

However, since we are looking for angles within the range of 0° to 360°, we can subtract 360° from the angle in the fourth quadrant to get an equivalent angle in the first quadrant:

θ = 510° - 360° = 150°

With such a common reference angle of 150°, the angles in each quadrant are as follows:

210° in the first quadrant

330° in the second quadrant

30° in the third quadrant

150° in the fourth quadrant (which is equivalent to 510°

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a) Velocity vector v(t) = i - 2tj, Speed s(t) = sqrt(1 + 4t²), Acceleration vector a(t) = -2j. b) Velocity vector v(1) = i - 2j, Acceleration vector a(1) = -2j

This problem is about finding the velocity, speed, and acceleration vectors of an object moving in the xy-plane, described by a position vector r(t). We can find the velocity vector by taking the derivative of the position vector, and the speed by taking the magnitude of the velocity vector. The acceleration vector can be found by taking the derivative of the velocity vector. We can then evaluate the velocity and acceleration vectors at a given point by plugging in the coordinates of the point. This problem requires basic vector calculus and understanding of the relationship between position, velocity, speed, and acceleration vectors.

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Complete question is attached below

The total amount owed, to the nearest cent, is $3651.12.

What is simple interest?

Simple Interest (S.I.) is the method of calculating the interest amount for a particular principal amount of money at some rate of interest.

The formula for simple interest is:

I = P * r * t

Where:

I = interest

P = principal

r = interest rate

t = time period

We can plug in the given values:

P = $3250

r = 4.9% = 0.049 (make sure to convert the percentage to a decimal)

t = 2.5 years

So the interest charged on the loan is:

I = $3250 * 0.049 * 2.5

I = $401.13

Therefore, the total amount owed is the sum of the principal and the interest:

Total amount owed = Principal + Interest

Total amount owed = $3250 + $401.13

Total amount owed = $3651.13

Rounding to the nearest cent gives:

Total amount owed = $3651.13 rounded to the nearest cent

Total amount owed = $3651.12 (since the next digit after the 2 is less than 5)

Therefore, the total amount owed, to the nearest cent, is $3651.12.

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Therefore, the quadratic polynomial with sum of zeroes 2/3 and product of zeroes 1/3 is:

3x² - 3x + 1

What is quadratic equation?

Quadratic equations are the polynomial equations of degree 2 in one variable of type f(x) = ax² + bx + c = 0 where a, b, c, ∈ R and a ≠ 0. It is the general form of a quadratic equation where 'a' is called the leading coefficient and 'c' is called the absolute term of f (x).

Let the quadratic polynomial be of the form ax² + bx + c.

We know that the sum of the zeroes is given by -b/a, and the product of the zeroes is given by c/a.

We are given that the sum of the zeroes is 2/3 and the product of the zeroes is 1/3.

So, we have the following system of equations:

-2b/3a = 2/3 (since the sum of zeroes is 2/3)

c/a = 1/3 (since the product of zeroes is 1/3)

Simplifying the first equation, we get:

b/a = -1

Substituting this in the second equation, we get:

c/a = 1/3

Multiplying both sides by a, we get:

c = a/3

So, we can choose any value for a, and then compute b and c accordingly.

Let's choose a = 3 for simplicity. Then, we have:

c = a/3 = 1

b/a = -1, so b = -3

Therefore, the quadratic polynomial with sum of zeroes 2/3 and product of zeroes 1/3 is:

3x² - 3x + 1

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The confidence interval for the difference between two means with dependent samples when the mean of the differences is d is given by

Confidence Interval = d ± t(0.005, n-1) × (SD / √n)

To calculate the 99% confidence interval for the difference between two means with dependent samples when the mean of the differences is d, you will need to know the standard deviation of the differences, the sample size, and the t-value for the 99% confidence level with (n-1) degrees of freedom.

Assuming that you have all these values, the formula for calculating the confidence interval is

Confidence Interval = d ± t(0.005, n-1) × (SD / √n)

Where

d is the mean of the differences between the two samples.

t(0.005, n-1) is the t-value for the 99% confidence level with (n-1) degrees of freedom. The 0.005 corresponds to the two-tailed alpha level of 0.01, since we are using a 99% confidence level.

SD is the standard deviation of the differences between the two samples.

n is the sample size.

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After answering the provided question, we can conclude that As a result, function Mark's annual premium is $1,500.

In mathematics, a function appears to be a connection between two numerical sets in which each individual of the first set (widely recognized as the domain) matches a particular member of the second set (called the range). In other words, a function takes input by one set and provides output from another. The variable x has frequently been used to represent inputs, and the variable y has been used to represent outputs. A formula or a graph can be used to represent a function. For example, the formula y = 2x + 1 represents a linear model whereby each x-value yields a unique value of y.

To determine Mark's total annual premium, add the premiums for liability insurance and collision/comprehensive insurance together.

Mark purchases liability insurance with coverage limits of 50/100/50. This means that his policy will pay up to $50,000 per person for bodily injury, $100,000 for bodily injury per accident, and $50,000 for property damage per accident.

Total Annual Premium: To determine Mark's total annual premium, add together his liability and collision/comprehensive insurance premiums:

Liability Premium + Collision/Comprehensive Premium = Total Annual Premium

Annual premium total = $500 + $1,000

$1,500 is the total annual premium.

As a result, Mark's annual premium is $1,500.

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Answer:

971.8

Step-by-step explanation:

to get the equation of any straight line, we simply need two points off of it, let's use those two in the picture below.

[tex](\stackrel{x_1}{2}~,~\stackrel{y_1}{7})\qquad (\stackrel{x_2}{4}~,~\stackrel{y_2}{21}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{\textit{\large rise}} {\stackrel{y_2}{21}-\stackrel{y1}{7}}}{\underset{\textit{\large run}} {\underset{x_2}{4}-\underset{x_1}{2}}} \implies \cfrac{ 14 }{ 2 } \implies 7[/tex]

[tex]\begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{7}=\stackrel{m}{ 7}(x-\stackrel{x_1}{2}) \\\\\\ y-7=7x-14\implies {\Large \begin{array}{llll} y=7x-7 \end{array}}[/tex]

Answer:

f(x) = 7x - 7

or

y = 7x - 7

Step-by-step explanation:

The y intercept is the point (0, -7), so the y intercept is -7.  The slope is the change in y over the change in x.   y is increasing by 7 as x is increasing by 1, so the slope is 7/1 or just 7

y = mx + b  put the slope in for m and the y-intercept for b

y = 7x - 7

Helping in the name of Jesus.

Answer:

Step-by-step explanation:

1 ft = 12 in

We can convert 3/4 ft to inches as follows:

3/4 ft = (3/4) x 12 in/ft = 9 in

Therefore, 3/4 ft is equal to 9 inches.

The system of equation is now written as:

y = −2x−8

y = x+ 1

First, we will plotting two system of  equations on the same axis, and then we'll explore the different factors to consider when plotting two linear inequalities on the same axis. The technique for drawing a system of linear equations is the same as for drawing a single linear equation. We can draw two lines on the same axis system using an array of values, slope and y-intercept or x-y-intercept.

Now,

these using slope-intercept form on the same set of axes. Remember that slope-intercept form looks like

y = mx+ b,  so we will want to solve both equations for y.

First, solve for y in 2x+y=−8

2x+ y = −8

OR, y = −2x− 8

Second, solve for y in

x− y = −1

Or, y = x+1

The system is now written as

y = -2x - 8

y = x + 1

Now you can plot the two equations using their slope and intercept on the same set of axes as shown in the figure below. Note that these charts have one thing in common. It is their intersection, the point that lies on the two lines. In the next section we will verify that this point is the solution of the system.

Complete Question:

Graph each system of equations. Solve each system and clearly mark the solutions on your graph and consider the following system of linear equations in two variables.

                            2x+ y = −8 and x− y = −1

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The perimeter of the given figures is: Triangle = 4x - 2. Rectangle = 8x - 8, and square = 12x - 8y.

The whole distance encircling a form is referred to as its perimeter. It is the length of any two-dimensional geometric shape's border or outline. Depending on the size, the perimeter of several figures can be the same. Consider a triangle built of an L-length wire, for instance. If all the sides are the same length, the same wire can be used to create a square.

The perimeter of a figure is the sum of all the segments of the figure.

The perimeter of triangle is:

P = 2x - 5 + x + x + 3 = 4x - 2

The perimeter of rectangle is:

P = 2(l + b)

P = 2(3x + 1 + x - 5)

P = 2(4x - 4)

P = 8x - 8

The perimeter of square is:

P = 4(s)

P = 4(3x - 2y)

P= 12x - 8y

Hence, the perimeter of the given figures is: Triangle = 4x - 2. Rectangle = 8x - 8, and square = 12x - 8y.

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Answer:

false

Step-by-step explanation:

only right triangles

Answer:

false

Step-by-step explanation:

The converse of the Pythagorean theorem is used to find the length of the hypotenuse of a right triangle.

The probability that Bernard will take 1 green counter and 1 white counter is 0.82.

Let's first find the total number of white and green counters in the bag:

Total counters = 20

Red counters = 7

Green/White counters = 20 - 7 = 13

Now, let's calculate the probability that Bernard will take 2 white counters:

Probability of getting the first white counter = 13/20

Probability of getting the second white counter (after taking one out) = 12/19

Probability of getting 2 white counters = (13/20) * (12/19) = 0.41 (rounded to two decimal places)

Now, let's calculate the probability that Bernard will take 1 green counter and 1 white counter:

Probability of getting 1 green counter = 13/20

Probability of getting 1 white counter (after taking 1 green out) = 12/19

Probability of getting 1 green and 1 white counter = (13/20) * (12/19) = 0.41

However, we have to consider that there are two ways in which Bernard can get 1 green and 1 white counter - he can either get the green counter first and the white counter second, or vice versa. Therefore, we need to multiply the above probability by 2:

Probability of getting 1 green and 1 white counter = 0.41 * 2 = 0.82

Therefore, the probability that Bernard will take 1 green counter and 1 white counter is 0.82.

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Rhiannon arrived home approximately 17 minutes earlier than Alexander.

This is the arithmetic mean and is calculated by adding a group of numbers and then dividing by the count of those numbers. For example, the average of 2, 3, 3, 5, 7, and 10 is 30 divided by 6, which is 5.

To solve this problem, we can use the formula:

time = distance / speed

a) The time it took Alexander to get home is:

time_Alexander = 14 km / 20 km/h = 0.7 hours

The time it took Rhiannon to get home is:

time_Rhiannon = 10 km / 24 km/h = 0.41667 hours

Since Rhiannon's time is smaller than Alexander's, Rhiannon arrived home earlier.

b) The time difference between their arrivals is:

time_difference = time_Alexander - time_Rhiannon = 0.7 hours - 0.41667 hours = 0.28333 hours

To convert this to minutes, we can multiply by 60:

time_difference_in_minutes = 0.28333 hours x 60 minutes/hour ≈ 17 minutes

Therefore, Rhiannon arrived home approximately 17 minutes earlier than Alexander.

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The stone fell from a height of 1.75 m above the top of the window.

We can use the kinematic equation for the vertical motion of an object in free fall to solve this problem:

y = vi*t + (1/2)at^2

where y is the initial height above the top of the window, vi is the initial velocity (which is zero since the stone is dropped), t is the time it takes for the stone to fall past the window (0.31 s), a is the acceleration due to gravity (-9.8 m/s^2).

Since the stone falls past a window that is 2.2 m tall, the final height of the stone is 2.2 m. Substituting these values into the equation, we get:

2.2 m = 0 + (1/2)(-9.8 m/s^2)(0.31 s)^2 + y

Simplifying and solving for y, we get:

y = 2.2 m - (1/2)(-9.8 m/s^2)(0.31 s)^2

y = 2.2 m - 0.45 m

y = 1.75 m

Therefore, the height from stone fell is 1.75 m.

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10 because 10 minus 3 is seven then seven squared is 49

Answer:

2

Step-by-step explanation:

The basic 30-60-90 triangle ratio is:

     Side opposite the 30° angle: x

     Side opposite the 60° angle: x√3

     Side opposite the 90° angle: 2x

Here, the side opposite the 90° angle is 4.

This means that 2x = 4 and, thus, x = 2.

Since b is the side opposite the 30° angle, b = x, so it is 2.

Using calculus, we can find the rate of change of area of circle and square that is 83.44 m/sec.

One of the most crucial areas of mathematics that addresses ongoing change is calculus. Calculus is primarily built on the two ideas of derivatives and integrals. The area under the curve of a function is measured by its integral rather than its derivative, which measures the rate of change of the function.

Whereas the integral adds together a function's discrete values over a range of values, the derivative explains the function at a particular point.

Let x be the side of the square and r be the radius of the circle,

If so, the area inside the square but outside the circle is given by:

V = Square area minus Circle area.

hence, area of a square = side² and area of a circle = π(radius)²,

Thus,

V = x² - πr²

Differentiating with respect to time (t)

dV/dt = 2x × dx/dt - 2πr dr/dt

Given,

x = 16

r = 3

dx/dt = 2 m/sec

dr/dt = 1 m/sec

⇒ dV/dt = 2 × 16 × 3 - 2π × 2 × 1

= 96 - 4π

= 96-12.56

≈ 83.44 m/sec

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Answer: Below :)

Step-by-step explanation:

Part A:

The theoretical probability of drawing a purple card from the hat is the number of purple cards divided by the total number of cards in the hat:

P(purple) = 14 / (12 + 17 + 14 + 7) = 14 / 50 = 0.28

So the theoretical probability of drawing a purple card is 0.28 or 28%.

Part B:

The theoretical probability of drawing a purple card is 0.28.

The experimental probability of drawing a purple card is the number of times a purple card was drawn divided by the total number of draws:

Experimental probability = 324 / 1080 = 0.3

To find how much greater the experimental probability is than the theoretical probability, we can calculate the difference and express it as a percentage:

Difference = Experimental probability - Theoretical probability

Difference = 0.3 - 0.28 = 0.02

Percentage greater = (Difference / Theoretical probability) x 100%

Percentage greater = (0.02 / 0.28) x 100% = 7.14%

So the experimental probability is 7.14% greater than the theoretical probability.

Therefore, the only statement that is true is: "The new area is 6 times the original area."

Area is a measure of the size or extent of a two-dimensional surface or region, such as the surface of a square, rectangle, circle, triangle, or any other shape. It is expressed in square units, such as square meters, square feet, or square centimeters.

Here,

If the side lengths of a square are tripled, the new side length will be 2 mm x 3 = 6 mm.

The original area of the square is:

Area = side length x side length = 2 mm x 2 mm = 4 mm²

The new area of the square with tripled side lengths will be:

New area = new side length x new side length = 6 mm x 6 mm = 36 mm²

Therefore, the new area of the square will be 36 mm².

To determine which of the following statements about its area will be true, we need to see which statements are true for the new area of 36 mm²:

A. The new area is 6 times the original area. This statement is true because 36 mm² is 6 times larger than 4 mm².

B. The new area is 3 times the original area. This statement is false because 36 mm² is 9 times larger than 4 mm², not 3 times larger.

C. The new area is equal to the original area. This statement is false because the new area of 36 mm² is much larger than the original area of 4 mm².

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Complete question:

look at this square: 2 mm 2 mm if the side lengths are tripled, then which of the following statements about its area will be true?

The ratio of the new area to the old area will be 2:1

The ratio of the new area to the old area will be 6:1.

The ratio of the new area to the old area will be 1:2.

The ratio of the new area to the old area will be 4:1.

For the function f(x) = 7/8x² - 14, the x-intercepts are x = -4 and x = 4.

What is a function?

In mathematics, a function is a unique arrangement of the inputs (also referred to as the domain) and their outputs (sometimes referred to as the codomain), where each input has exactly one output and the output can be linked to its input.

To find the x-intercepts of the function f(x), we need to solve the equation f(x) = 0.

f(x) = 7/8x² - 14

Substitute f(x) with 0 -

0 = 7/8x² - 14

Add 14 to both sides -

7/8x² = 14

Multiply both sides by 8/7 -

x² = 16

Take the square root of both sides -

x = ±4

Therefore, the x-intercepts of the function f(x) are x = -4 and x = 4.

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Answer:

12 cm

Step-by-step explanation:

If a regular hexagon is inscribed into a circle, the length of the side of a hexagon is the same as the radius.

You know this because a hexagon is made up of six equilateral triangles (all three sides are the same length). If inscribed in a circle, the common vertex (point of intersection for all triangles) is the center of the circle.

Attached is an image I found online that helps visualize what I am saying.

The solution to the linear system of differential equations  { x' = -5x - y, y' = 6x   is x(t) = 0 and y(t) = 2.

To solve this system of differential equations, we can use the method of elimination. We first eliminate y from the equations by multiplying the first equation by 6 and the second equation by 5, and then adding them:

6x' = -30x - 6y

5y' = 30x

Adding the left sides and right sides separately, we get:

6x' + 5y' = -30x

30x + 5y' = 30x

Simplifying, we get:

6x' + 5y' = -30x

y' = -6x

Substituting y' = -6x into the first equation, we get:

x' = -5x - (-6x) = -x

So we have two separate first-order differential equations:

x' = -x with x(0) = 0

y' = -6x with y(0) = 2

Solving the first equation, we have:

x(t) = x(0) * e^(-t) = 0

Solving the second equation, we use the fact that x(t) = 0:

y' = 0 - 6(0) = 0

y(t) = y(0) + y' * t = 2

Therefore, the solution to the differential equations is x(t) = 0 and y(t) = 2.

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_____The given question is incomplete, the complete question is given below:

Find the solution to the linear system of differential equations { x' = -5x - y, y' = 6x  satisfying the initial conditions x(0)= 0 and y(0)= 2 find x(t) and y(t) Note: You can earn partial credit on this problem.

Answer:

Step-by-step explanation:

To calculate how much Flounder paid for the bonds, we need to use the present value formula for a bond:

PV = C/(1+r)^1 + C/(1+r)^2 + ... + C/(1+r)^n + F/(1+r)^n

where PV is the present value, C is the annual coupon payment, r is the yield, n is the number of years, and F is the face value.

In this case, Flounder purchased 325 bonds with a face value of $1000 each, so the total face value of the bonds is:

325 * $1000 = $325,000

The coupon rate is 11%, which means that the annual coupon payment is:

0.11 * $1000 = $110

The bonds mature in 10 years, so n = 10. The yield is also 11%, so r = 0.11.

Using these values, we can calculate the present value of the bond:

PV = $110/(1+0.11)^1 + $110/(1+0.11)^2 + ... + $110/(1+0.11)^10 + $1000/(1+0.11)^10

PV = $110/(1.11)^1 + $110/(1.11)^2 + ... + $110/(1.11)^10 + $1000/(1.11)^10

PV = $110/1.11 + $110/(1.11)^2 + ... + $110/(1.11)^10 + $1000/(1.11)^10

PV = $110*(1-(1.11)^-10)/0.11 + $1000/(1.11)^10

PV = $750.98 + $314.23

PV = $1,065.21

Therefore, Flounder paid $1,065.21 for the 325 bonds of Walters Inc.

The subgroup of S4 that is isomorphic to Z2 is {e, (1 2)(3 4)}.

The equation of the line with slope 2 that goes through the point (6,1) in slope-intercept form is y = 2x - 11. This means that the y-intercept of the line is -11, and the slope of the line is 2, which means that for every increase of 1 in x, the line will increase by 2 in y.

To find the equation of a line with a given slope and a point on the line, we can use the point-slope form of a linear equation:

y - y1 = m(x - x1)

where m is the slope and (x1, y1) is the given point on the line.

In this case, the slope is given as 2 and the point (6,1) is on the line. Plugging these values into the equation, we get:

y - 1 = 2(x - 6)

Expanding the right side, we get:

y - 1 = 2x - 12

Adding 1 to both sides, we get:

y = 2x - 11

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Answer:

(1, 2) and (-1, -2). or. (±1, ±2)

Step-by-step explanation:

[tex]{ \sf{f(x) = \frac{4x}{ {x}^{2} + 1 } }} \\ [/tex]

- Simply, a critical number or critical point is gotten by differentiating the function.

From Quotient rule;

[tex]{ \sf{ {f}^{l}(x) = \frac{4( {x}^{2} + 1) - (2x)(4x)}{ {( {x}^{2} + 1)}^{2} } }} \\ \\ { \sf{f {}^{l}(x) = \frac{ {4x}^{2} + 4 - {8x}^{2} }{ {( {x}^{2} + 1) }^{2} } }} \\ \\ { \sf{f {}^{l}(x) = \frac{4(1 - {x}^{2}) }{ {( {x}^{2 } + 1) }^{2} } }}[/tex]

Then equate this derivative to zero;

[tex]{ \sf{0 = \frac{4(1 - {x}^{2} )}{ {( {x}^{2} + 1) }^{2} } }} \\ \\ { \sf{4(1 - {x}^{2} ) = 0}} \\ \\ { \sf{4 - {4x}^{2} = 0}} \\ \\ { \sf{4 {x}^{2} = 4}} \\ \\ { \sf{x = \sqrt{1} }} \\ \\ { \sf{ \underline{ \: x = \pm 1 \: }}}[/tex]

Substitute for x in f(x)

For x = 1

[tex]{ \sf{f(1) = \frac{4(1)}{ {(1)}^{2} + 1} = \frac{4}{2} = 2 }} \\ [/tex]

For x = -1

[tex]{ \sf{f( - 1) = \frac{4( - 1)}{ {( - 1)}^{2} + 1 } = \frac{ - 4}{2} = - 2 }} \\ [/tex]

Therefore points are;

(1, 2) and (-1, -2)

The ratio of frequencies between G# and D# is: G# / D# = 415.3 / 293.7 ≈ 1.414

To find the missing frequencies for G# and D# using the ratio 1.0595, we need to multiply the frequency of the previous note by 1.0595. Starting from A440, we can use this ratio to calculate the frequencies of G# and D#:

G#: 440 x 1.0595^8 ≈ 830.6 Hz

D#: 440 x 1.0595^6 ≈ 622.3 Hz

The ratio of frequencies between G# and D# is:

830.6 / 622.3 ≈ 1.334

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The given distribution has mean value of 0.6. The values of m and n can have multiple solutions. sum of the probabilities P(X<=1) is 0.5, variance of X is 2.11, expected value of Y=3X+1 is 4.9, and variance of Y is 19.0.

The given distribution can be represented as follows:

X         -1 0.2 2 0.1 3

P(X)  0.2 0.2 0 0.1 0.5

To find the mean value of X, we use the formula:

E(X) = Σ [ xi * P(X = xi)

E(X) = (-1 * 0.2) + (0.2 * 0.2) + (2 * 0) + (0.1 * 0.1) + (3 * 0.5)

E(X) = 1.3

Since E(X) = 0.6, we can set up the following equation:

E(X) = Σ [ xi * P(X = xi) ] = 0.6

(-1 * 0.2) + (0.2 * 0.2) + (2 * 0) + (0.1 * 0.1) + (3 * 0.5) = 0.6

Simplifying this equation gives us:

0.1 + 1.5 = m * n

m * n = 1.6

We can choose any values of m and n that satisfy this equation. For example, we can choose m = 1 and n = 1.6, or m = 2 and n = 0.8.

P(X <= 1) is the sum of the probabilities of all values of X less than or equal to 1:

P(X <= 1) = P(X = -1) + P(X = 0.2) + P(X = 0.1)

P(X <= 1) = 0.2 + 0.2 + 0.1

P(X <= 1) = 0.5

The variance of X can be found using the formula:

Var(X) = E(X^2) - [E(X)]^2

To find E(X^2), we use the formula:

E(X^2) = Σ [ xi^2 * P(X = xi) ]

E(X^2) = (-1)^2 * 0.2 + 0.2^2 * 0.2 + 2^2 * 0 + 0.1^2 * 0.1 + 3^2 * 0.5

E(X^2) = 4.3

Then, we can calculate the variance:

Var(X) = E(X^2) - [E(X)]^2

Var(X) = 4.3 - 1.3^2

Var(X) = 2.11

The expected value of Y = 3X + 1 can be found using the formula:

E(Y) = E(3X + 1) = 3E(X) + 1

E(Y) = 3(1.3) + 1

E(Y) = 4.9

To find the variance of Y, we use the formula:

Var(Y) = Var(3X + 1) = 9Var(X)

Var(Y) = 9(2.11)

Var(Y) = 19.0

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