A jar contains 12 red marbles numbered 1 to 12 and 8 blue marbles numbered 1 to 8. A marble is drawn at random from the jar. Find the probability of the given event.

Use the fact that [tex]\sin x = \sqrt{1-\cos^2 x}[/tex] to solve it.

[tex]\sin(\arccos(-\frac{9}{\sqrt{145}}))=\sqrt{1-\cos^2(\arccos(-\frac{9}{\sqrt{145}}))} =\\= \sqrt{1-(-\frac{9}{\sqrt{145}})^2}=\frac{8}{\sqrt{145}}[/tex]

Answer:

a

Step-by-step explanation:

A=259.8 cm^2 is the correct answer

Answer:

4

Step-by-step explanation:

Answer:

A D F

Step-by-step explanation:

Area of rectangle: 80*45=3600

Area of semi-circle: ((60/2)^2)/2*pi=1413

Total area of grass=3600-1413=2187

The probability of not getting a sum of 4 when rolling two six-sided dice is 33/36 or 92%. The probability of getting a sum greater than 5 when rolling two six-sided dice is 13/18 or approximately 72%.

The subject area for this question is in Mathematics, specifically probability. The question asks to determine the probability of a sum not being 4, and of a sum being greater than 5 when two six-sided dice are rolled.

(a) The possibilities of getting a sum of 4 are (1,3), (2,2), and (3,1). That's 3 possibilities out of a total of 36, therefore the probability of not getting a sum of 4 is 1 - (3/36) = 33/36 (in simplified form) and as a percentage that's approximately 92%.

(b) The possibilities of getting a sum greater than 5 are (2,4),(3,3),(3,4),(4,2),(4,3),(4,4),(1,5),(2,5),(3,5),(4,5),(5,1),(5,2),(5,3),(5,4),(5,5),(1,6),(2,6),(3,6),(4,6),(5,6),(6,1),(6,2),(6,3),(6,4),(6,5), and (6,6). That's 26 possibilities out of 36, therefore the probability of getting a sum greater than 5 is 26/36 or 13/18 in simplest form, and as a percentage that's approximately 72%.

In this way, understanding of probability and how to calculate it properly can help in accurately determining outcomes in different scenarios.

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The probability of the sum not being 4 is (36 - 3) / 36, and the probability of the sum being greater than 5 is 21 / 36.

When two six-sided dice are rolled, there are 36 possible outcomes. To find the probability that the sum is not 4, we need to calculate the number of outcomes where the sum is not 4 and divide it by the total number of outcomes.

There are 3 outcomes with a sum of 4, so the probability is (36 - 3) / 36.

To find the probability that the sum is greater than 5, we need to calculate the number of outcomes where the sum is greater than 5 and divide it by the total number of outcomes.

There are 21 outcomes with a sum greater than 5, so the probability is 21 / 36.

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Answer:

see below

Step-by-step explanation:

As x gets larger, y gets smaller. Only one of the graphs has that characteristic.

Line of the graph (3) could be the graph of the points in the table.

To determine which line could be the graph of the points in the table, we can plot the points and then draw a line that passes through all three points.

The line that passes through all three points is the line that intersects the y-axis at 0 and has a slope of −2.

Therefore, the line that could be the graph of the points in the table is:

y = -2x

We can check our answer by substituting the points from the table into the equation. If the points satisfy the equation, then the equation is a possible graph of the points.

To learn more about graph here:

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Explanation:

It is the same reason that the distance by road is not the same as the distance "as the crow flies." The two vectors are often not aligned so that the magnitudes both add to directly to the distance from the origin (or the tail of the first vector).

For example, suppose you walk two segments of 1 mile each. If you walk east in both cases, you end up 2 miles east of where you started. (The sum of the vectors is the sum of their magnitudes.)

If you walk east 1 mile and north 1 mile, you end up about 1.4 miles from where you started, not 2 miles. The second "vector" did not add directly to the distance from your starting point.

If you walk east 1 mile, then west 1 mile, you end up exactly where you started. The sum of the vectors is zero, but the sum of their magnitudes is still 2 miles.

The sum of magnitudes of vectors and magnitude of sum of two vectors are not equal due to the directionality property of vectors. The sum of vectors is calculated through the parallelogram rule, accounting both magnitude and direction. It uses the principles of geometry and trigonometry depending on the vectors' alignment.

The reason that the sum of the magnitudes of two vectors and the magnitude of the sum of two vectors is not equal lies in basic properties of vectors, specifically, the directionality of vectors. When you add two vectors, you are applying the parallelogram rule, which considers both the magnitude and direction of the vectors. Because the sum of vectors results in a resultant vector based on their geometrical arrangement, the magnitude of the resultant vector is not simply a sum of original magnitudes but a composition governed by rules of geometry and trigonometry.

To put it simply, if two vectors are aligned in the same or opposite direction, the magnitude of their sum or difference will be the sum or difference of their magnitudes. But if the vectors are at an angle (neither parallel nor anti-parallel), the magnitude of the sum will be less than the sum of the individual magnitudes, due to the Pythagorean theorem applied in the parallelogram rule.

For example, If you have vectors A and B and they happen to make a right angle (perpendicular), the magnitude of the sum (Resultant vector) will be √(A²+B²), not  A + B. The sum of the magnitudes would be aligned along one line while the magnitude of the sum would be along the hypotenuse of the right triangle formed by vectors, hence the difference.

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Answer:

y = 1/2x^2 - 2x + 1

Step-by-step explanation:

The equation of the parabola in vertex form is y = 1/2 (x - 2)^2 - 1. By finding the vertex at (2,-1) we plug in the point into the formula y = a(x-h)^2 + k. To convert it to standard form like the equations listed, multiply through the distributive property to clear the parenthesis.

y = 1/2 (x-2)(x-2) - 1

y = 1/2 (x^2 - 4x + 4) - 1

y = 1/2x^2 - 2x + 2 - 1

y = 1/2x^2 - 2x + 1

A) 3/20 would be the answer

Answer:

The answer is B $0.00

Step-by-step explanation:

Answer:

The answer is 0%

Step-by-step explanation:

Previous Balance Method uses the "previous" balance, that is, the balance from the month before.

Here it is given that Melody's balance at the beginning of the billing cycle is $0.

So, this means she has to pay interest on $0 (the previous month balance)

And for the rest balance, she will pay the next month.

Therefore, the answer is 0%

Answer:

Step-by-step explanation:

3x + 2 < 12

3x < 10

x < 10/3

x < 3 1/3

D. x = 3.5, because 3.5 > 3 1/3 and x can't be bigger than 3 1/3

Answer:

3.5

Hope this helps :)

Have a great day !

5INGH

Step-by-step explanation:

3 x + 2 < 12

( -2 from both sides )

3 x < 10

( ÷ 3 from both sides )

x < 3.33333333333

So x is less than 3.33333333333 but the question asks which is not a solution and 3.5 is greater than 3.33333333333 so 3.5 is your answer

A straight line is 180°. So you can do:

(15x - 4) + (5x - 8) = 180  Simplify

20x - 12 = 180

20x = 192    Find the value of x

x = 9.6

m∠ABD = 15x - 4      Plug in x = 9.6

m∠ABD = 15(9.6) - 4 = 144 - 4 = 140°

m∠DBC = 5x - 8   Plug in 9.6

m∠DBC = 5(9.6) - 8 = 48 - 8 = 40°

Final answer:

To find the unknown angle, use the trig identity sin(90° - x) = cos x, ensure the calculator is in radian mode, and check if the answer is reasonable.

Explanation:

To find the unknown angle measure in the given problem, we need to use the trigonometric identity sin(90° - x) = cos x. This identity is useful when dealing with right-angled triangles and can help in finding missing angles when other angles or sides are known.

First, we need to identify the known values within the problem and the given equation. Assuming we are looking for value 'a', we then solve the equation by substituting the appropriate known values into it. After that, we need to ensure that our calculator is set to radian mode, as the instructions suggest that angle measurements should be in radians.

After obtaining the numerical solution, it is important to check if the answer is reasonable and makes sense within the context of the problem.

b) u gotta each R point w p & q and see which one would give u a right triangle, which is b

Answer:

your answer should be (-3,3)

Step-by-step explanation:

brainliest pls

Bill needs to sell more than 45 candy bars to reach his fundraising goal of $100, after factoring in his insurance cost.

Bill is trying to raise a minimum of $100 for soccer. If each candy bar is priced at $2 and he has an insurance cost of $10, we can start calculating how much product he needs to sell to reach his goal.

Firstly, we subtract the insurance cost from the total he needs to raise. This is because the insurance cost is a fixed cost that he needs to cover regardless of the number of candy bars sold. Hence, $100 - $10 = $90.

Now, the remaining $90 needs to be covered by selling candy bars. As each candy bar costs $2, we divide $90 by $2 to find out how many candy bars he needs to sell. Therefore, $90 ÷ $2 = 45 candy bars.

This shows that Bill needs to sell more than 45 candy bars to reach his goal, taking into account his initial fixed insurance cost.

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Use Formula C= pi(d) so that would be 3.14 x 100 = 314

Answer:

the circumference is 314.16

the answer will be B

Answer:

D.) 10.4 yd

Step-by-step explanation:

In the given figure the alternate angles are equal and hence a right angle triangle with one of its angle as 30 degree is formed .

For angle 30 degrees adjacent side is 18 yard and opposite side is x.

Tan of an angle is equal to [tex]\frac{opposite}{adjacent}[/tex]

[tex]Tan 30=\frac{x}{18}[/tex]

x=Tan 30 (18)

x= 10.39

x= 10.4 yard (rounded  to tenth place)

Option D is the right answer.

Answer:

180

Step-by-step explanation:

because it doesn't has to be exact you can do: 10 × 18 = 180

Answer:

180

Step-by-step explanation:

This is a good question to keep in mind. When you do use a calculator the answer to this estimate will tell you if your work on the calculator is correct.

round the cost of the pizza to 10

18 * 10 = 180 dollars. So you should get an answer that is under 180 dollars -- about 3 dollars short. (0.17 * 18 which is another guess).

Now pick up your calculator and do the math. It comes to 176.94

If you do any grocery shopping, this is a good skill to have.

Answer:

750 yards

Step-by-step explanation:

I entered the area of the field into a Pythagorean Theorem Calculator and it concluded that the diagonal length of the field would be approximately 750 yard.

Answer:

300 yd saved

Step-by-step explanation:

The length of the diagonal of the field is found using the Pythagorean Theorem and is

d = √( 450 yd)² + ( 600 yd)² ) = √562500 yd² = 750 yd is the diagonal distance.  If, on the other hand, the farmer walks the length and width of the perimeter of the field, that would be 450 yd + 600 yd, or 1050 yd.

The farmer could spare himself 1050 - 750, or 300 yd, of walking if he crosses the field along a diagonal.

Answer:

1. Distrubutive  2. Associative 3. Commutative  4. Identity

Step-by-step explanation:

1. Distributive property 2. Associative property

3. Identity property 4. Commutative property

For this case we have that by definition:

[tex]a (b + c) = ab + ac[/tex]

So:

[tex]4 (x-2) = 4x-8[/tex]

State the distributive property.

[tex]a + (b + c) = (a + b) + c[/tex]

So:

[tex](4 + 2) + 8 = 4 + (2 + 8)[/tex]

Enunciates the associative property

[tex]a * b = b * a[/tex]

So:

[tex]4 * 2 = 2 * 4[/tex]

Enunciates the commutative property

[tex]4 * 1 = 4[/tex]

State identity property

Answer:

Distributive property

Associative property

Commutative property

Identity property

Answer:

the actual answer is a(n)= 500 * ( 1 + 0.03) ^(n - 1) ;$579.64

Step-by-step explanation:

Answer:

15

Step-by-step explanation:

5 times 15 is 75

10 times 3 is 30

75 -30 = 45

Answer:

The value of a is 15

Step-by-step explanation:

Given the equation

[tex]5a-10b=45[/tex]

we have to find the value of a when b is 3

[tex]5a-10b=45[/tex]

Substitute b=3, we get

[tex]5a-10(3)=45[/tex]

[tex]5a-30=45[/tex]

[tex]5a=45+30=75[/tex]

[tex]a=\frac{75}{5}=15[/tex]

Hence, the value of a is 15

Answer:

Step-by-step explanation:a+b

ANSWER

B. y=8x +1200

EXPLANATION

If the family's well pumps on average 8 gallons of water per minute, then the unit rate of change is 8.

This implies that, the slope of the linear equation that models this situation is

[tex]m = 8[/tex]

It was also given that, the well's tank had 1200 gallons of water in the morning.

This implies that the y-intercept of the straight line is

[tex]b = 1200[/tex]

The equation is given by:

[tex]y = mx + b[/tex]

We substitute the values to obtain:

[tex]y = 8x + 1200[/tex]

The amount of water in the tank, y after it has been pumping for x minutes is

[tex]y = 8x + 1200[/tex]

Answer:

the mean absolute deviation of the data set is 2.

Step-by-step explanation:

To calculate the mean absolute deviation of a data set, we need to follow the following steps:

Step 1: Calculate the mean.

Step 2: Calculate how far away each data point is from the mean (always keeping a possitive distance).

Step 3: Calculate the mean of the deviations.

Step 1: The mean of the data set is:

Mean = (12 + 10 + 10 + 8 + 6+ 7 + 7 + 12)/8 = 72/8 = 9

Step 2:

{12 -9, 10-9, 10-9, 9-8, 9-6, 9-7, 9-7, 12-9} = {3, 1, 1, 1, 3, 2, 2, 3}

Step 3: (3 + 1 + 1 + 1 + 3 + 2 + 2 + 3)/8 = 2

In conclusion, the mean absolute deviation of the data set is 2. Which corresponds to the option B.

Divide total parking spaces by number of levels.

87 / 3 = 29

There are 29 parking spaces on each level.

To find out how many parking spaces are on each level of a garage with 87 total spaces and 3 levels, divide the total number of parking spaces (87) by the number of levels (3) to get 29 parking spaces per level.

If a parking garage has a total of 87 parking spaces and there are 3 levels in the garage with an equal number of parking spaces on each level, to find out how many parking spaces are on each level, we need to divide the total number of parking spaces by the number of levels.

Here is the step-by-step calculation:

Therefore, there are 29 parking spaces on each level in the garage.

Answer:

28.6%; 313,099

Step-by-step explanation:

Lawyers are either male or female, so if 71.4% are male, then 100% minus that are female.

100% - 71.4% = 28.6%

28.6% of 1,094,751 is:

0.286 × 1094751 = 313098.786

Rounded to the nearest whole number, there are 313,099 female lawyers.

Answer:

C

Step-by-step explanation:

First we find the z-score.

z = (x - μ) / σ

z = (520 - 500) / 60

z = 0.33

Using a calculator or z-score table:

P(z < 0.33) = 0.6293

The probability is approximately 63%.  Answer C

Answer:

63%

Step-by-step explanation:

63%

Answer:

B

Step-by-step explanation:

x<5

When we multiply by negative number sign of inequality should be  changed also.

x*(-1) > 5*(-1)

-x>-5

For this case we have the following expression:

[tex]x <5[/tex]

By definition we have to:

Let [tex]c <0[/tex]. If [tex]a <b,[/tex] then [tex]ac> bc[/tex]

That is to say:

If we multilate on both sides of the inequality by -1, the sign automatically changes direction.

[tex](-1) (x) <(- 1) (5)\\-x> -5[/tex]

ANswer:

Option B

Answer:

Some customers who rate their service as high quality return for additional services.

Step-by-step explanation:

Last year, the results showed that of the customers who reported high quality service, 20% returned for additional services.

This shows than some customers are satisfied overall and return back for additional services.

Answer:

The simplified expression is d = (5√2) L

Step-by-step explanation:

* Lets explain the problem

- A walking path is shaped like a rectangle

- The width of the rectangle is 7 times its length L

∵ The length of the rectangle is L

∵ The width is 7 times the length

∴ The width of the rectangle is 7L

- The distance between the opposite corners represented by the

  diagonal of the rectangle

- The length , the width and the diagonal formed a right triangle

- Its hypotenuse is the diagonal of the rectangle

- Its two legs are the length and the width of the rectangle

* Now we have right triangle use the Pythagoras Theorem to find

 the hypotenuse

∵ The length , the width and the diagonal of the rectangle are the

   sides of a right triangle

∵ The diagonal is the hypotenuse (h) of the triangle

∵ hypotenuse = √[L² + W²]

∵ The length = L and the width = 7L

∴ h = √[(L)² + (7L)²] = √[L² + 49L²] = √[50L²]

∵ √50 = 5√2

∵ √(L²) = L

∴ h = 5√2 L

∵ The diagonal of the rectangle is the distance between the

   opposite corners

∴ The distance between the opposite corners is (5√2) L

* The simplified expression is d = (5√2) L, where L is the length

  of the rectangle

To find the distance between opposite corners of the walking path, which is shaped like a rectangle, we need to determine the length of the diagonal.
Given that the width is 7 times the length (l), we can represent the width of the rectangle as \(7l\).
Let's denote the length of the rectangle by \(l\) and the width by \(w\). According to the information, \(w = 7l\).
Now, to find the length of the diagonal, we use the Pythagorean theorem, which states that for a right-angled triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.
For our rectangle, the diagonal forms the hypotenuse, and the length and width are the other two sides of the right-angled triangle. Thus, if we denote the diagonal by \(d\), the Pythagorean theorem gives us:
\(d^2 = l^2 + w^2\)
Substituting the expression for the width:
\(d^2 = l^2 + (7l)^2\)
\(d^2 = l^2 + 49l^2\)
\(d^2 = 50l^2\)
To find \(d\), we take the square root of both sides:
\(d = \sqrt{50l^2}\)
Since \(50\) can be broken down into \(25 \times 2\) and \(25\) is a perfect square, we can simplify the square root as follows:
\(d = \sqrt{25 \times 2 \times l^2}\)
\(d = \sqrt{25} \times \sqrt{2} \times \sqrt{l^2}\)
\(d = 5l \times \sqrt{2}\)
So the simplified expression for the distance between opposite corners of the walking path is:
\(d = 5l\sqrt{2}\)