one card is selected at random from a deck of cards. determine the probability of selecting a card that is less than 8 or a club. note that the ace is considered a low card.

Answer:

y=7, x=7

Step-by-step explanation:

They both equal y, so you can set the right part of the equations equal to each other

4x-21=2x-7

solve for x

2x-21=-7

2x=14

x=7

knowing x, we can now substitute back into one of the original equations to find y

y=4(7)-21=28-21=7

or

y=2(7)-7=14-7=7

Answer:

(63a+54b) and (2xy+11yz)

Step-by-step explanation:

9*7a is 63a

9*6b is 54b

2x*y is 2xy

11z*y is 11yz

Answer:

-2, -1, 0, 4, 9

Step-by-step explanation:

a. € A. Yes, 27 € A. To see this, we set a = 5, so that x = 27.

Does –8 € A? No. If –8 were in A, then –8 = 5a + 2 for some integer a. But then a = (–10)/5, which is not an integer, a contradiction.

Does – 8 € B? Yes, we set b = 0, so that y = –3, which is in B.

In either case, we have expressed y as a member of A or C, which means that B CA.

b. AB. We claim that AB. To see this, we assume the contrary, namely, that there is an integer z which is in both A and B. This means that z = 5a + 2 and z = 10b – 3 for some integers a and b. Adding these two equations, we get 7 = 5a + 10b, or 1 = a + 2b. Since the left-hand side is odd, so is the right-hand side, which means that a and b have opposite parity. However, this is impossible since 1 is not odd. Therefore, the assumption that there is such a z is false, which means that AB, as desired. C. B CA. We claim that B CA. To see this, we need to show that every element of B is in A or C. Let y be an element of B, so that y = 10b – 3 for some integer b. If y is even, then we can set a = (y + 1)/5, and we have x = 5a + 2 = y/2 + 3/2. If y is odd, then we can set c = (y + 3)/7, and we have z = 7c – 4 = y/2 + 5/2.

Know more about integer here:

https://brainly.com/question/490943

#SPJ11

Answer:

x >8

Step-by-step explanation:

Answer:

x > 8

Step-by-step explanation:

Solving an algebraic inequality is the same as solving an algebraic equation. One uses the technnique of inverse operations to undo every step in the expression to get the answer. The only difference is that with an inequality, one must remember to flip the inequality sign when dividing or multiplying by a negative. This rule does not apply to the given inequality.

5(x + 2) > 50

/5            /5

x + 2 > 10

  -2      -2

x > 8

Answer:

she needs 1/3 chocolate bars

Step-by-step explanation:

8 × 2/3

=5 1/3

Answer:

6t(2t - 1)

Step-by-step explanation:

12t² - 6t

Common factor: 6t

Factored:

6t(2t - 1)

F(x<=0) = 1/2.The correct option is (b) 1+e-2.

The probability distribution function of the random variable X is given by;

`f(x) = {(x+1), for x between -1 and 1, 0 elsewhere}.

The random variable Y is defined as Y = g(X), and y = g(x).

Find the probability that F(X) is less than or equal to 0. That is; F(x <= 0).

To find this, we need to evaluate the integral of the function over the interval (-infinity, 0).

Thus, F(x<=0) = ∫[from -∞ to 0] f(x) dx.

We know that the function is zero for all values of x, except when -1 < x < 1.

Therefore, we can break up the integral into two parts. We get:

F(x<=0) = ∫[from -∞ to -1] 0 dx + ∫[from -1 to 0] f(x) dx

Thus;

F(x<=0) = ∫[from -∞ to -1] 0 dx + ∫[from -1 to 0] (x + 1) dx

F(x<=0) = 0 + [(x^2/2) + x] [from -1 to 0]F(x<=0) = (0 - [(1/2) - 1]) = (1/2)

Therefore, F(x<=0) = 1/2.The correct option is (b) 1+e-2.

learn more about probability distribution function here:

https://brainly.com/question/32099581

#SPJ11

Answer:

87°

Step-by-step explanation:

The given expression is $\frac{6}{t}+\frac{8}{u}-\frac{9}{v}$ and we need to rewrite this expression without any denominator in it. Step-by-step explanation: We can use the concept of the Least Common Multiple (LCM) of the denominators to remove the fractions in the expression. By taking the LCM of the denominators of the given expression, we have,$LCM\text{ of }t, u, v = t \cdot u \cdot v$ Now, multiplying each term of the given expression with the LCM $t \cdot u \cdot v$, we get,$\frac{6}{t}\cdot t \cdot u \cdot v+\frac{8}{u}\cdot t \cdot u \cdot v-\frac{9}{v}\cdot t \cdot u \cdot v$$6uv + 8tv - 9tu$$\therefore \text{The given expression without any denominator is } 6uv + 8tv - 9tu.$Thus, we can rewrite the given expression $\frac{6}{t}+\frac{8}{u}-\frac{9}{v}$ without any denominator in it as $6uv + 8tv - 9tu$.

LCM (a,b) in mathematics stands for the least common multiple, or LCM, of two numbers, such as a and b. The smallest or least positive integer that is divisible by both a and b is known as the LCM. Take the positive integers 4 and 6 as an illustration.

There are four multiples: 4,8,12,16,20,24.

6, 12, 18, and 24 are multiples of 6.

12, 24, 36, 48, and so on are frequent multiples for the numbers 4 and 6. In that lot, 12 would be the least frequent number. Now let's attempt to get the LCM of 24 and 15.

LCM of 24 and 15 is equal to 222235 = 120.

Know more about LCM here:

https://brainly.com/question/24510622

#SPJ11

There are 380 ways to determine the first and second place in the race.

In a race, there are 20 runners. Trophies for the race are awarded to the runners finishing in first and second place. In how many ways can first and second place be determined?When the trophies for the race are awarded to the runners finishing in first and second place, then it means that there are only two trophies to be awarded. Now, the number of ways in which the two trophies can be awarded can be calculated by permutation, which is a way of counting the arrangements or selections of objects in which order is important.

To determine the number of ways first and second place can be determined in a race with 20 runners, we can use the concept of permutations.

The first-place finisher can be any one of the 20 runners. After the first-place finisher is determined, there are 19 remaining runners who can finish in second place. Therefore, the number of ways to determine the first and second place is given by:

Number of ways = 20 * 19 = 380

So, there are 380 ways to determine the first and second place in the race.

Learn more about permutation:https://brainly.com/question/1216161

#SPJ11

Answer:

-5/4

Step-by-step explanation:

Pick two points on the line

(-4,0) and (0,-5)

We can use the slope formula

m = (y2-y1)/(x2-x1)

   = ( -5 -0)/(0 - -4)

    = (-5-0)/(0+4)

    = -5/4

Answer: -5/4

Step-by-step explanation:

Pick two points on the line

(-4,0) and (0,-5)

We can use the slope formula

m = (y2-y1)/(x2-x1)

  = ( -5 -0)/(0 - -4)

   = (-5-0)/(0+4)

   = -5/4

- Chilio

The counterclockwise circulation of the vector field F around the closed curve C is 112/3 (or approximately 37.33).

To compute the counterclockwise circulation of the vector field F = (-2x + 10y)i + (6x - 8y)j around the closed curve C, we can apply Green's Theorem.

Green's Theorem states that the counterclockwise circulation of a vector field around a closed curve C is equal to the double integral of the curl of the vector field over the region R enclosed by the curve.

First, let's obtain the curl of the vector field F:

curl(F) = (∂F₂/∂x - ∂F₁/∂y)k

= (6 - (-2))k

= 8k

Now, let's obtain the region R enclosed by the curve C. The curve is described by two functions:

Upper curve: y = -3x^2 + 7

Lower curve: y = 4x^2

To get the limits of integration, we need to determine the x-values where the curves intersect. Setting the upper and lower curves equal to each other:

-3x^2 + 7 = 4x^2

7 = 7x^2

x^2 = 1

x = ±1

Since we are only considering the first quadrant, we take the positive value, x = 1.

The limits of integration for x will be from 0 to 1.

For y, the limits are determined by the upper and lower curves:

y = -3x^2 + 7

y = 4x^2

The limits of integration for y will be from 4x^2 to -3x^2 + 7.

Now, we can set up the double integral to calculate the counterclockwise circulation using Green's Theorem:

Circulation = ∬R curl(F) · dA

= ∬R 8k · dA

= 8 ∬R dA

Integrating with respect to x and y over the region R:

Circulation = 8 ∫[0,1] ∫[4x^2, -3x^2 + 7] dy dx

Evaluating the double integral will give us the counterclockwise circulation of F around the closed curve C.

Circulation = 8 ∫[0,1] ∫[4x^2, -3x^2 + 7] dy dx

First, we integrate with respect to y:

Circulation = 8 ∫[0,1] [y] |[4x^2, -3x^2 + 7] dx

= 8 ∫[0,1] ((-3x^2 + 7) - 4x^2) dx

= 8 ∫[0,1] (-7x^2 + 7) dx

= 8 [-7/3 * x^3 + 7x] |[0,1]

= 8 [(-7/3 * 1^3 + 7 * 1) - (-7/3 * 0^3 + 7 * 0)]

= 8 [-7/3 + 7]

= 8 [-7/3 + 21/3]

= 8 [14/3]

= 112/3

Learn more about green's theorem here, https://brainly.com/question/23265902

#SPJ11

The is specified initial approximation X1  x3 is equal to 5.

We absolutely need to accentuate using the recipe in order to find x3 using Newton's method:

In this particular instance, we are informed that x5 is equal to x2 minus 4 and that X1 equals 1. Because we need to find x3, let's use the given equation to find x2.

We can solve for x2 because we have x5: x2 + 4

As of now we have x2 = x5 - 4 from x2 = x5 - 4. This ought to be added to the Newton's system recipe, and afterward we can find x3:

We ought to portray our ability f(x) and its subordinate f'(x) as Xn+1 = Xn - f(Xn)/f'(Xn).

We can now calculate x3 by using X1 = 1 as our underlying estimate: X2 = X1 - f(X1)/f'(X1) = 1 - ((1)2 + 4 - 1)/(- 1) = 1 - (1 + 4 - 1)/(- 1) = 1 + 4 = 5 In this way, x3 is the same as 5.

To know more about Newton's method refer to

https://brainly.com/question/30763640

#SPJ11

The volume of the solid with a circular base of radius 3, where every plane cross-section perpendicular to the x-axis is an equilateral triangle, is option D) 36√3.


When each plane cross-section perpendicular to the x-axis is an equilateral triangle, we can see that the height of each equilateral triangle is equal to the diameter of the circular base, which is 6. Therefore, the height of the solid is 6.

To find the volume of the solid, we can use the formula for the volume of a cone, since the solid resembles a cone with equilateral triangular cross-sections. The volume of a cone is given by V = (1/3)πr^2h, where r is the radius of the circular base and h is the height.

Plugging in the values, we have V = (1/3)π(3^2)(6) = 18π. Simplifying, we get V = 54π.

Now, since the answer choices are in terms of √3, we can approximate π as 3.14. Therefore, V ≈ 54(3.14) = 169.56.

Rounding to the nearest whole number, the volume is approximately 170.

However, none of the answer choices provided are 170. The closest option is D) 36√3, which is approximately 187.45. Therefore, the correct answer is D) 36√3.


Learn more about Volume of circular base click here :brainly.com/question/16728505

#SPJ11

On average, if the null hypothesis is false, the expected value for the F-ratio is much greater than 1.00.

The F-ratio is a statistic used in analysis of variance (ANOVA) tests to compare the variances between groups. In the context of hypothesis testing, the F-ratio measures the ratio of the variability between groups to the variability within groups. When the null hypothesis is false, it means that there is a significant difference between the groups being compared.

If the null hypothesis is false, it implies that there are systematic differences between the groups, resulting in larger variation between groups compared to within groups. This leads to a higher F-ratio value. The F-ratio is calculated as the ratio of the mean square between groups to the mean square within groups. As the differences between groups become more pronounced, the F-ratio increases, indicating a greater likelihood of rejecting the null hypothesis.

Therefore, if the null hypothesis is false, the expected value for the F-ratio is much greater than 1.00, indicating significant variability between groups.

Learn more about F-ratio and ANOVA here: brainly.com/question/31973991

#SPJ11

The vector equation r(t) = t^2i + t^4j + t^6k represents a parametric curve in three-dimensional space. To sketch the curve, we can substitute values of t and plot corresponding points in the coordinate system.

By examining the components of the vector equation, we can observe that x = t^2, y = t^4, and z = t^6. This implies that the curve lies in the x-y-z coordinate system, where the x-coordinate is determined by t^2, the y-coordinate is determined by t^4, and the z-coordinate is determined by t^6.

To start sketching, we can choose a range of values for t and substitute them into the equations. For example, for t = -1, 0, 1, we can calculate the corresponding x, y, and z values.

By plotting these points and connecting them, we can obtain an approximate shape of the curve. Additionally, we can observe that as t increases, the curve moves in the direction of increasing t, which can be indicated by an arrow along the curve.

Note that without specific values for t or a specific range, the sketch will be a general representation of the curve.

learn more about coordinate system here: brainly.com/question/4726772

#SPJ11

Answer:

(-4, -2)

Step-by-step explanation:

A is initially (-4, 2); when we reflect over the y-axis, we will change from (x, y) to (x, -y). This gives us (-4, -2).

The coordinates of A' are (-5,-3).

If AABC is reflected across the y-axis, the coordinates of A' are (-5,-3).

The reflected graph is given below.

Therefore, the coordinates of A' are (-5,-3).

Know more about graphs here:

https://brainly.com/question/14323743

#SPJ2

Answer:

Graph B. is the one

Step-by-step explanation:

Can i have brainliest

Answer:

b is the right answer

Step-by-step explanation:

(x,y)

Answer:

6/17

Step-by-step explanation:

The amount of blue marbles is 30, over the total number of marbles, which is 85. 30/85 simplifies to 6/17, which is the probability.

Hopefully this helps - let me know if you have any questions!

Answer:

for the first part:

Oxygen and glucose are both reactants in the process of cellular respiration.

Step-by-step explanation:

The mass of hydrogen is conserved during cellular respiration as it follows the Law of Conservation of Matter...This shows that hydrogen has been conserved throughout the entire process as the product has the same amount of hydrogen as the reactants.

Answer:

D

Step-by-step explanation:

x = 2 and y = -7

Plug those values into the equation:

2(2) - (-7) = 11

The statement is incorrect since one stadium can hold only 80,000 people while the population of Dallas is approximately 1.3 million. 10 stadiums would, therefore, hold a total of 800,000 people.

The Cowboys Stadium in Dallas is a world-famous stadium, with a capacity of up to 80,000 people. The population of Dallas, Texas, USA, is approximately 1.3 million, according to data from 2020.

In other words, Gabriel's assertion that the whole of Dallas could be seated in ten Cowboys Stadiums is incorrect.

Although that's a significant figure, it's just over half of the city's entire population, and more than half of its people would have to be turned away if there were only ten Cowboys Stadiums present.

Therefore, it is essential to double-check such assertions before making them and presenting them as facts. It is better to research and verify information, rather than make claims that are incorrect and spread false information.

To learn more about : population

https://brainly.com/question/30396931

#SPJ8

The probability that an employed person earns a living through agriculture is ≈ 17%.

The frequency is the number of times the data appear within each category.

A percentage frequency distribution is used to summarize data and report on the proportion or percentage of observations that fall within a specified category.

It is the process of showing how often a particular value or category occurs in a set of data.

In order to create a percentage frequency distribution, we will first add all the values together:

Total number of people employed = 6,678 + 1,492 + 653 + 2,865 + 914

= 12,602

Now we can calculate the percentage of people employed in each sector:

Formal business sector =

(6,678 / 12,602) x 100% = 53.0%

Commercial agricultural sector =

(1,492 / 12,602) x 100% = 11.8%

Subsistence agricultural sector =

(653 / 12,602) x 100% = 5.2%

Informal business sector =

(2,865 / 12,602) x 100% = 22.7%

Domestic service sector =

(914 / 12,602) x 100% = 7.3%

The likelihood that an employed person earns a living through agriculture can be calculated by adding the number of people employed in the commercial agricultural sector and the number of people employed in subsistence agriculture.

This gives a total of 2,145 people employed in agriculture.

Therefore, the probability that a person earns a living through agriculture is:

Probability = (2,145 / 12,602) x 100% ≈ 17%

The probability that an employed person earns a living through agriculture is ≈ 17%.

To know more about probability, visit:

https://brainly.com/question/13604758

#SPJ11

The equation rearranged to isolate c is c = b / (a - b/d).

To isolate c in the equation a = b(1/c - 1/d), we can follow these steps:

Start with the equation a = b(1/c - 1/d).

Distribute b to the terms inside the parentheses: a = b/c - b/d.

Move the term b/c to the other side of the equation by subtracting it from both sides: a - b/c = -b/d.

Multiply both sides of the equation by c to eliminate the denominator in the left term: c(a - b/c) = -b/d * c.

Simplify the left side by distributing c: ac - b = -bc/d.

Move the term -bc/d to the other side of the equation by adding it to both sides: ac - b + bc/d = 0.

Factor out c on the right side of the equation: ac + c(-b/d) - b = 0.

Combine like terms: ac - (b/d)c - b = 0.

Factor out c: c(a - b/d) - b = 0.

Add b to both sides of the equation: c(a - b/d) = b.

Finally, isolate c by dividing both sides of the equation by (a - b/d): c = b / (a - b/d).

Therefore, the equation rearranged to isolate c is c = b / (a - b/d).

Know more about Eliminate here:

https://brainly.com/question/32403760

#SPJ11

Answer:

Step-by-step explanation: 1.4 x the amount of years = 7 then 23000 divided by 7 = 3,285.7

Realizing that the mental barriers of being scared to be wrong or too slow were getting in the way and stopping his kids from even attempting to solve problems, Gallin decided to change his approach.