A
B
D
31.
An expression is shown.
6(2+3)² - 1
What is the value of the expression?
A. 20
B. 59
C. 149
D. 899

The area of a sector of a circle is calculated as approximately 44.24 square units.

The area of the sector of a circle can be calculated by applying the given formula below:

Area of sector = ∅/360 * π * r², where: r is the radius of the circle and ∅ is the central angle or reference angle of the sector.

Given the parameters of the sector of the circle as:

Central angle (∅) = 30 degrees

Radius (r) = RS = 13 units

Plug in the values:

Area of sector = 30/360 * π * 13²

Area of sector ≈ 44.24 square units.

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Answer:

8

Step-by-step explanation:

12 ÷ 3 = 4

2 x 4 = 8

Hope I could help :)

For the given quadratic equation, the value of constant abc is 45/8.

We need to rewrite the given quadratic equation in the form of a(x+b)²+c, where a, b, and c are constants, and then find the product abc. To do this, we'll complete the square.

Given quadratic equation: 2x² -10x+8

Follow these steps to determine the product:

1: Divide the entire equation by the leading coefficient 2:

x² -5x+4

2: Add and subtract the square of half the linear coefficient inside the parentheses. Half of 5 is 5/2, and (5/2)² is 25/4:

x² - 5x + 25/4 - 25/4 + 4

3: Combine the terms and rewrite the equation in the form a(x+b)²+c:

(1)(x - 5/2)² - 9/4

4: Now, we can see that a = 1, b = -5/2, and c = -9/4. So the product abc is:

abc = (1)(-5/2)(-9/4) = (45/8)

Therefore, the value of abc is 45/8.

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The domain and range of this sine function y = sinx include the following:

C. Domain: All real numbers

D. Range: -1 ≤ y ≤ 1

In Mathematics and Geometry, a range can be defined as the set of all real numbers that connects with the elements of a domain.

Furthermore, the horizontal extent of any graph of a function represents all domain values and they are always read and written from smaller to larger numerical values, and from the left-hand side of the graph to the right-hand side.

By critically observing the graph shown in the image attached above, we can reasonably and logically deduce the following domain and range:

Domain = {-∞, ∞}, x|x ∈ R, or all real numbers.

Range = {-1, 1}, y ≥ or -1 ≤ y ≤ 1.

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The graph of your equation is a parabola with x-intercepts at x = -8.75 and x = 7.25.

x = -8.75; x = 7.25

2(x + ¾)² - 5 = 123

Add 5 to each side:                     2(x+ ¾)² = 128

Divide each side by 2:                   (x+ ¾)² = 64

Take the square root of each side: x + ¾ = 8       x + ¾ = -8

Subtract ¾ from each side:                     x = 8 - ¾        x = -8 - ¾

Convert to decimal fraction:                    x = 8 - 0.75    x = -8 – 0.75  

Subtract:                                                   x = 7.25           x = -8.75

The graph of your equation is a parabola with x-intercepts at x = -8.75 and x = 7.25.

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The graph of your equation is a parabola with x-intercepts at x = -8.75 and x = 7.25.

x = -8.75; x = 7.25

2(x + ¾)² - 5 = 123

Add 5 to each side:                     2(x+ ¾)² = 128

Divide each side by 2:                   (x+ ¾)² = 64

Take the square root of each side: x + ¾ = 8       x + ¾ = -8

Subtract ¾ from each side:                     x = 8 - ¾        x = -8 - ¾

Convert to decimal fraction:                    x = 8 - 0.75    x = -8 – 0.75  

Subtract:                                                   x = 7.25           x = -8.75

The graph of your equation is a parabola with x-intercepts at x = -8.75 and x = 7.25.

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Step-by-step explanation:

the perimeter (the way one time around it) of a rectangle is

2×length + 2×width

length = 3×width

2×(3×width) + 2×width = 160

6×width + 2×width = 160

8×width = 160

width = 160/8 = 20 ft

length = 3×width = 3×20 = 60ft

We can see here that the triangle is a right-angle triangle.

The fundamental geometric shape of a triangle has three straight sides and three angles. It is a triangular polygon with three edges.

We can see here that the triangle is a right-angle triangle because using Pythagoras Theorem, we will see the following:

Hypotenuse = c = 30

Adjacent = b = 24

Opposite = a = 18

c² = a² + b²

Hyp² = Opp² + Adj²

30² = 18² + 24²

324 + 576 = 900.

Thus, it is a right-angle triangle.

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Step-by-step explanation:

Using the distance formula, we know that the distance between points A and B is:

sqrt((3 - 0)^2 + (a - 4)^2) = 5

Simplifying:

sqrt(9 + (a - 4)^2) = 5

Squaring both sides:

9 + (a - 4)^2 = 25

Simplifying:

(a - 4)^2 = 16

Taking the square root of both sides (note that we can take the positive or negative square root since both will satisfy the equation):

a - 4 = ±4

Solving for a:

a - 4 = 4 or a - 4 = -4

a = 8 or a = 0

However, we need to check that these values of a actually make sense based on the given information. If a = 0, then the distance between A and B is:

sqrt((3 - 0)^2 + (0 - 4)^2) = sqrt(9 + 16) = 5

So a = 0 is a valid solution. If a = 8, then the distance between A and B is:

sqrt((3 - 0)^2 + (8 - 4)^2) = sqrt(9 + 16) = 5

So a = 8 is also a valid solution.

Therefore, the possible values of a are a = 0 or a = 8.

The value of a can be 0 or 8 if the distance between the given points is 5.

A straight line drawn between two points is the shortest distance between the two points. We can calculate the shortest distance by the distance formula.

Let A(0,4) = (x1,y1)

     B(3,a) = (x2,y2)

Using distance formula,

[tex]D = \sqrt{(x2-x1)^2 + (y2-y1)^2}[/tex]

As distance = 5 units

Therefore,

[tex]\sqrt{(x2-x1)^2 + (y2-y1)^2} = 5[/tex]

[tex]\sqrt{(3-0)^2 + ((a-4)^2} = 5[/tex]

[tex]\sqrt{(3)^2 + (a^2 + 16 + - 8a)} = 5[/tex]

[tex]\(9 + 16 + a^2 - 8a = 25[/tex]

[tex]25 + a^2 -8a = 25[/tex]

[tex]a^2 - 8a = 0[/tex]

[tex]a(a-8) = 0[/tex]

a = 0 and a = 8

Therefore, the answer is 0 or 8.

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The graph that shows the image of ABC after a rotation about the origin is the graph d

Rotation about the origin is a transformation in which a point or object is rotated around the origin (0, 0) by a certain angle. The origin is the fixed point of the rotation, and all other points move in a circular path around the origin.

To perform a rotation about the origin, you need to know the angle of rotation, the coordinates of the point or object being rotated, and the direction of rotation (clockwise or counterclockwise).

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

The graph after a rotation about the origin is the graph (d)

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The zeros of the function are:

-¹/₂ ± √((3)/2) i, 1/3 and - 2

We want to find the Zeros of the polynomial:

f(x) = 3x⁴ + 8x³ + 6x² + 3x - 2

By the rational root theorem, we know that any rational zeros of f(x) must be expressible in the form p/q for integers p,q with p a divisor of the constant term −2 and q a divisor of the coefficient 3 of the leading term.

Therefore, the only possible rational zeros are:

±¹/₃, ±²/₃, ±1, ±2

Let's check x = 1/3 to get:

f(¹/₃) = 3(¹/₃)⁴ + 8(¹/₃)³ + 6(¹/₃)² + 3(¹/₃) - 2 = 0

f(-2) = 3(-2)⁴ + 8(-2)³ + 6(-2)² + 3(-2) - 2 = 0

Thus, x = 1/3 and - 2 are zeros of the function and (3x - 1) and (x + 2) are factors.

Using these factors and using the polynomial to divide them, we have that the remaining factor is: x² + x + 1

The zeros of x² + x + 1 are the Complex cube roots of 1, since

(x - 1)(x² + x + 1) = x³ - 1

using the quadratic formula, we have:

x = -¹/₂ ± √((3)/2) i

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Answer:

The correct answer is D. 5.4% after rounding my answer off to the nearest tenth of a percent.

The statements that are true about the scatter plot graph are;
1. The line of best fit should have the same number of points above and below it.

2. There is a moderate positive correlation.

3. The line of best fit will have a positive slope.

Some facts about scatter plot graphs:

Scatter plots are used to show the correlation or relationship between two variables. The variables are plotted on the x and y-axes, and each point represents a pair of values for the two variables.

Scatter plots can show different types of relationships between two variables, including positive, negative, or no correlation.

The shape of a scatter plot can provide insights into the strength and direction of the relationship between the two variables. For example, if the points on the scatter plot form a linear pattern, this indicates a strong correlation.

Scatter plots can be used to identify outliers or anomalies in the data that do not fit the general pattern of the relationship between the two variables.

The above answer is based on the following options provided in the picture.

Tick all the statements that applies

The y intercept of the line  of best fit would be around 45

The line of best fit should have the same number of points above and below it

The slope of the line of best fit could be around -1/20000

The line of best fit must pass through at lest 2 points on the scattered plot

There is no correlation between happiness and income

There is a moderate positive correlation

The line of best fit will have a positive slope

As a person's income goes up, their happiness trends down

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Answer:

To determine the fluid replacement rate for a burn patient in the first 8 hours, we can use the Parkland formula:

Fluid (in liters) = 4 mL × body weight in kg × % total body surface area (TBSA) burned

First, we need to calculate the TBSA burned. We can use the Rule of Nines to estimate this:

Head: 9%

Left Arm: 9%

Right Arm: 9%

Upper Front Torso: 0%

Upper Back Torso: 0%

Lower Front Torso: 18%

Lower Back Torso: 18%

Upper Left Leg: 0%

Upper Right Leg: 0%

Lower Left Leg: 0%

Lower Right Leg: 9%

Total TBSA burned = 9 + 9 + 9 + 18 + 18 + 9 = 72%

Now we can plug in the values into the Parkland formula:

Fluid (in liters) = 4 mL × 50.9 kg × 72% = 14,694.72 mL

To convert mL to liters, we divide by 1000:

Fluid (in liters) = 14,694.72 mL ÷ 1000 = 14.69 L

This is the total amount of fluid the patient needs in the first 8 hours. To determine the hourly rate, we divide by 8:

Hourly fluid rate = 14.69 L ÷ 8 = 1.84 L/hour

Therefore, the patient should receive approximately 1.84 liters of fluid per hour in the first 8 hours of their care.

Answer:

Step-by-step explanation:

To compute the break-even sales (in barrels) for the current year, we need to first determine the contribution margin per barrel, which is the amount left over from the selling price of each barrel of beer after variable costs are subtracted.

Variable costs per barrel can be calculated as 75% of the cost of goods sold per barrel, which is:

Variable cost per barrel = (75% x Cost of goods sold) / Barrels sold

Variable cost per barrel = (0.75 x $1,628 million) / 37 million barrels

Variable cost per barrel = $33.00

Similarly, the variable marketing, general, and administration expenses per barrel can be calculated as:

Variable marketing, general, and administration expenses per barrel = (50% x Marketing, general, and administration expenses) / Barrels sold

Variable marketing, general, and administration expenses per barrel = (0.50 x $592 million) / 37 million barrels

Variable marketing, general, and administration expenses per barrel = $8.00

Therefore, the contribution margin per barrel is:

Contribution margin per barrel = Selling price per barrel - Variable costs per barrel

Contribution margin per barrel = $6,512 million / 37 million barrels - $33.00 - $8.00

Contribution margin per barrel = $98.00

To compute the break-even sales (in barrels) for the current year, we can use the following formula:

Break-even sales (in barrels) = Fixed costs / Contribution margin per barrel

Fixed costs can be calculated as:

Fixed costs = Income from operations + Variable marketing, general, and administration expenses x Barrels sold - Contribution margin per barrel x Barrels sold

Fixed costs = $4,292 million + $8.00 x 37 million barrels - $98.00 x 37 million barrels

Fixed costs = $1,108 million

Substituting this into the formula, we get:

Break-even sales (in barrels) = $1,108 million / $98.00 per barrel

Break-even sales (in barrels) = 11.29 million barrels

Rounding this to two decimal places and converting to millions, we get:

Break-even sales (in barrels) = 11.29 million barrels = 11.3 million barrels (rounded)

The equation is 2m + 4s = 16 and the table of values is solved

Given data ,

Let the equation be represented as A

Now , the value of A is

2m + 4s = 16

when m = 0

4s = 16

s = 4

when s = 3

2m + 12 = 16

2m = 4

m = 2

when m = -2

-4 + 4s = 16

4s = 20

s = 5

when s = 0

2m = 16

m = 8

Therefore , the table of values for m = { 0 , 2 , -2 , 8 } and the table of values for s = { 4 , 3 , 5 , 0 }

Hence , the equation is solved

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Answer:

Area of annulus is 40.85cm² to 2d.p

Step-by-step explanation:

Area of shaded part=Area of bigger circle -Area of smaler circle

Area of annulus= πR²- πr²= π(R²-r²)

A=3.142(7²-6²)

A=3.142(49-36)

A=3.142×13

A=40.846cm²

A=40.85cm² to 2d.p

Answer:

China's fiscal stimulus increases global aggregate demand because it increases China's GDP and imports, which increases other countries' exports to China. This fiscal stimulus might have lost some of its force because it decreases China's government budget surplus and raises the world real interest rate.

Step-by-step explanation:

hope this helps

The confidence interval is given as (38.811,43.829)

In statistics, a margin of error refers to the degree of imprecision that can be projected in survey or polling outcomes due to random sampling involved in such studies.

This indicator serves as both the measure for the accuracy of results and an assurance of confidence in them. The percentage rate expressing the magnitude of the latter varies inversely with the former and depends on the sample size, desired level of confidence, and cumulative trends in feedback obtained from respondents.

Thus, surveys featuring minimal margins of error are considered substantively accurate while ones plagued by larger margins signal a lack thereof.

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The adjascent angles to angle EDC is angle EDI and CDH.

Two angles are said to be adjacent angles when they share the common vertex and side. The sum of adjascent angles is 180°. This means that adding two adjascent angles together will give 180°. Adjascent angles are also called supplementary angles.

Examples of adjascent angles in the diagram include;

AEB Is adjascent to AED

and also there are two angles that are adjascent to angle EDC. They are;

angle ED1 and CDH

Therefore the adjascent angles to angle EDC is angle EDI and CDH.

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Answer:

First, we need to put the equation in standard form, which is ax^2 + bx + c = 0. So, we have 2x^2 + 6x + 3 = 0.

Using the Quadratic Formula, x = (-b ± sqrt(b^2 - 4ac)) / 2a, we can plug in the values for a, b, and c:

x = (-6 ± sqrt(6^2 - 4(2)(3))) / 2(2)

x = (-6 ± sqrt(36 - 24)) / 4

x = (-6 ± sqrt(12)) / 4

Simplifying further, we have:

x = (-6 ± 2sqrt(3)) / 4

x = (-3 ± sqrt(3)) / 2

To the nearest hundredth, the solutions are:

A. 2.37 and 0.63

In the cylinder , height of the water tank is 5.5 feet.

What is volume?

The space taken up by any three-dimensional solid constitutes a volume, to put it simply. A cube, cuboid, cone, cylinder, or sphere can be one of these solids. Cubic units are used to measure the volume of solids. The volume will be given in cubic metres, for instance, if the dimensions are given in metres.

Given that,

A cubic foot contains roughly 7.48 liquid gallons.

We have to find what is roughly the height of a cylindrical water tank with a capacity of 1,500 liquid gallons and a radius of 3.4 feet.

We know that,

7.48 liquid gallons are contained in one cubic foot.

The cylindrical water tank's radius is 3.4 feet.

1,500 liquid gallons are the maximum capacity.

The cylindrical water tank's volume is calculated to hold 1500 liquid gallons ,

= [tex]\frac{1500}{7.48}[/tex]

= 200.53 ft³

Volume of the cylinder= πr²h

=> 200.53= 3.14 ×3.4×3.4×h

=> 200.53 = 3.14 × 11.56 × h

=> 200.53 = 36.29 × h

=> h= 5.5

=> h= 5.5 feet (Approximately)

Therefore, height of the water tank is 5.5 feet.

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Answer:

7,920

Step-by-step explanation:

I took test and got 100%

Answer:

c. 8 2/8

Step-by-step explanation:

12 1/2 - 4 7/10 = 12 5/10 - 4 7/10 = 8 2/10 = 8 1/5 = 8.2

Therefore, the answer is option c. 8 2/8

Hope this helps!

Answer:

percentage increase: 43,75%

Step-by-step explanation:

If we want to solve thai as an equation, we can write:

800 + (x/100) * 800 = 1150

we multiply: 800 + 800x/100 = 1150

we simplify: 800+ 8x = 1150

we bring the unknown to the left, and numbers to the right:

8x = 1150 - 800

8x = 350

we find x by dividing each part by 8

x= 43,75

(note that the x/100 in the first equation is the same thing as writing x%, so 800 plus a percentage of 800 is equal to 1150)

Answer: it is reflected by y-axis

Step-by-step explanation: as we know when point (x,y) reflected  by y axis the value of y remains the same and the sign of x will be changed since the image is rotated horizontaly

Answer:

y-axis

Step-by-step explanation:

When a point is reflected over the y-axis, the x-coordinate of the point becomes the additive inverse of the original number.

Here, (8, -15) became (-8, -15). The only change in value of the coordinates is the value of the x-coordinate, 8, which became its additive inverse, -8.

Answer: y-axis

Answer: it is reflected by y-axis

Step-by-step explanation: as we know when point (x,y) reflected  by y axis the value of y remains the same and the sign of x will be changed since the image is rotated horizontaly

Answer:

y-axis

Step-by-step explanation:

When a point is reflected over the y-axis, the x-coordinate of the point becomes the additive inverse of the original number.

Here, (8, -15) became (-8, -15). The only change in value of the coordinates is the value of the x-coordinate, 8, which became its additive inverse, -8.

Answer: y-axis

Answer:

1) 26

2) 118

3) 144

4) 58

5) 38

6) 96

7) 84

8) 156

9) 240

Step-by-step explanation:

Draw a Venn diagram to confirm my answers.

35% of the 240 students were interested in athletics, so .35 × 240 = 84 students were interested in athletics. Since 26 students were interested in both athletics and academic clubs, 84 - 26 = 58 students were interested in athletics only.

3/5 of the 240 students were interested in academic clubs, so 3/5 × 240 = 144 students were interested in academic clubs. Since 26 students were interested in both athletics and academic clubs,

144 - 26 = 118 students were interested in academic clubs only. From this information, you should be able to complete the two-way table.

If a rectangle has a perimeter of 48 in. the length and width are scaled by a factor of 2.5, the perimeter of the resulting rectangle is 225 inches.

Let L be the length of the original rectangle and W be the width. Then, the perimeter of the original rectangle is P = 2L + 2W = 48 inches.

If we scale the length and width by a factor of 2.5, we get a new length of 2.5L and a new width of 2.5W. The perimeter of the new rectangle would be:

P' = 2(2.5L) + 2(2.5W)

= 5L + 5W

To find the new perimeter, we need to find the new values of L and W. Since the length and width are scaled by the same factor, we can write:

2.5L = kL

2.5W = kW

where k is the scaling factor.

Since the new rectangle is scaled by a factor of 2.5, k = 2.5. Therefore:

L' = 2.5L = 2.5(12) = 30 inches

W' = 2.5W = 2.5(6) = 15 inches

The new perimeter is:

P' = 5L' + 5W'

= 5(30) + 5(15)

= 225 inches

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We can conjecture that the value of the instantaneous velocity at t=3 is  81.6.

To find the average velocity over an interval, we use the formula:

average velocity = (change in distance)/(change in time)

Using the position function s(t) = -16t^2 + 100t, we can find the change in distance over an interval [a, b] by subtracting the value of s(a) from the value of s(b):

change in distance = s(b) - s(a)

change in distance = [-16(b^2) + 100b] - [-16(a^2) + 100a]

change in distance= -16(b^2 - a^2) + 100(b - a)

Similarly, we can find the change in time over the same interval by subtracting a from b:

change in time = b - a

Using these formulas, we can complete the table as follows:

Time Interval | Average Velocity

[2,3] | 84

[2.9,3] | 82

[2.99,3] | 81.6

[2.999, 3] | 81.6

[2.9999,3] | 81.6

Based on these results, we can make a conjecture about the value of the instantaneous velocity at t = 3.

From the table, the average velocity over smaller and smaller intervals around t=3 is approaching a value of 81.6.

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