HELP ASAP!!! I WILL GIVE BRAINLIEST

Step-by-step explanation:

you can simply multiply things out.

4/9 × y = 8/3

4y = 9×8/3 = 3×8 = 24

y = 6

or you could have transformed the right hand side into a fraction of the same denominator (9) :

8/3 = 8/3 × 3/3 = (8×3)/(3×3) = 24/9

4/9 × y = 24/9

that means 4y = 24

y = 6

Step-by-step explanation:

15 / (1/3)  is equal to  15 x 3/1  = 15 x 3 = 45

Answer:

was only able to do #11

Step-by-step explanation:

Answer:

#12

Step-by-step explanation:

If segment BD is congruent to segment BC, and BD = 4x - 18, BC = x + 3, and AC = 34, then AB = 31/x.

Let the equation be AB + BC = AC

substitute the values in the above equation, we get

AB + x + 3 = 34

simplifying the value of x,

Subtract A B from both sides AB + x + 3 - AB = 34 - A B

x + 3 = 34 - AB

Subtract 3 from both sides,

x + 3 - 3 = 34 - AB - 3

x = -AB + 31

Plug in this value of x into the line segments to find BC and AC.

Where, BC = x + 3

substitute the value of x in the above equation, we get

BC = [-AB + 31 ] + 3

BC = -AB + 34

Then, AB + BC = AC

x = -AB + 31

AB = 31/x

Hence, If segment BD is congruent to segment BC, and BD = 4x - 18,

BC = x + 3, and AC = 34, then AB = 31/x.

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7. The speed of the car is approximately 73.3 miles per hour. 10.  a. 7.07 ft/sec b. 9.87 feet from the center. c. the person on the outside is approximately 30 ft.

It is a fundamental concept in physics and is used to describe the motion of objects in both everyday life and scientific contexts. In addition to speed, other related concepts include velocity (which includes direction) and acceleration (the rate at which an object's speed or velocity changes).

7. The circumference of the wheel is given by C = πd, where d is the diameter of the wheel. Therefore, the circumference of each wheel is:

C = πd = π(22 in) = 22π in

Since the wheels are rotating at 600 rpm (revolutions per minute), the distance covered by each wheel in one minute is:

distance = circumference × revolutions = 22π in/rev × 600 rev/min = 13,200π in/min

To convert this to miles per hour, we need to convert inches to miles and minutes to hours. There are 12 inches in 1 foot and 5280 feet in 1 mile, so there are 63360 inches in 1 mile. There are 60 minutes in 1 hour, so:

distance = 13,200π in/min = (13,200π in/min) × (1 ft/12 in) × (1 mi/5280 ft) × (60 min/1 hr) ≈ 73.3 mi/hr

Therefore, the speed of the car is approximately 73.3 miles per hour.

10. a) The linear speed of a point on the carousel is given by v = rω, where r is the distance from the center of the carousel and ω is the angular velocity in radians per second. Since the carousel makes 3 revolutions per minute, the angular velocity is:

ω = (3 rev/min) × (2π rad/rev) × (1 min/60 sec) = π/10 rad/sec

The linear speed of a person riding a horse that is 22.5 ft from the center is:

v = rω = (22.5 ft) × (π/10 rad/sec) ≈ 7.07 ft/sec

b) Let d be the distance of the person on the inside from the center. Since the carousel makes 3 revolutions per minute, the angular velocity is still ω = π/10 rad/sec. The linear speed of the person on the inside is given as 3.1 ft/sec, so:

v = rω

3.1 ft/sec = d × (π/10 rad/sec)

d = (3.1 ft/sec) × (10/π rad/sec) ≈ 9.87 ft

Therefore, the person on the inside is approximately 9.87 feet from the center.

c) The linear speed of a point on the carousel is proportional to its distance from the center. Therefore, the ratio of the linear speeds of the person on the outside and the inside is equal to the ratio of their distances from the center:

v_outside/v_inside = r_outside/r_inside

We know that the linear speed of the person on the inside is 3.1 ft/sec and the distance of the person on the inside is approximately 9.87 feet. Therefore:

v_outside/3.1 ft/sec = r_outside/9.87 ft

v_outside = (r_outside/9.87 ft) × (3.1 ft/sec)

We can solve for r_outside by using the fact that the carousel makes 3 revolutions per minute:

v_outside = r_outsideω

v_outside = r_outside × (3 rev/min) × (2π rad/rev) × (1 min/60 sec)

v_outside = r_outsideπ/10 rad/sec

Combining these equations, we get:

r_outsideπ/10 rad/sec = (r_outside/9.87 ft) × (3.1 ft/sec)

r_outside ≈ 30.9 ft

Therefore, the person on the outside is approximately 30.

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An engineer is designing a fuel tank in the shape of a cylinder, the approximate radius of the cylinder is 8.2 inches.

Volume:

V = πr²h

Height:

h = 2r

V = πr²h

V= πr²(2r)

V= 2πr³

And we know that the volume must be 3,500 in³, now we can replace that and solve for R, we will get:

V= πr²h

3500 = 3.14 x 2 x (r)³

r = 8.2 inch

The cylinder's approximate radius must be 8.2 inches.

One of the most fundamental curvilinear geometric shapes, a cylinder has historically been a three-dimensional solid. It is regarded as a prism with a circle as its base in basic geometry. In several contemporary fields of geometry and topology, a cylinder can alternatively be characterised as an infinitely curved surface.

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a) The controllable state space realization is A = [[0, 1], [-8, -6]], B = [[1], [1]], C = [1, 2], and D = 0.

b) The system is controllable.

c) The system is observable.

d) The kernel of the transient matrix [s1-4]' is [0, 0]'.

a) To find the controllable state space realization, we need to express the transfer function in the general state space form:

G(s) = C(sI - A)^(-1)B + D

where A, B, C, and D are matrices.

First, let's factorize the denominator of the transfer function:

s^2 + 6s + 8 = (s + 2)(s + 4)

This gives us the eigenvalues of the system: λ1 = -2 and λ2 = -4.

Now, we can construct the A matrix:

A = [[0, 1],

    [-8, -6]]

Next, we construct the B matrix using the numerator coefficients:

B = [[1],

    [1]]

Then, the C matrix can be obtained from the coefficients of the numerator:

C = [1, 2]

Finally, the D matrix is zero in this case:

D = 0

Therefore, the controllable state space realization is:

A = [[0, 1],

    [-8, -6]]

B = [[1],

    [1]]

C = [1, 2]

D = 0

b) The controllability of the system can be determined by checking the controllability matrix:

Qc = [B, AB]

Qc = [[1, 1],

     [-6, -14]]

The system is controllable if the rank of the controllability matrix is equal to the number of states. In this case, the rank of Qc is 2, and we have 2 states, so the system is controllable.

c) The observability of the system can be determined by checking the observability matrix:

Qo = [[C],

     [CA]]

Qo = [[1, 2],

     [-14, -32]]

The system is observable if the rank of the observability matrix is equal to the number of states. In this case, the rank of Qo is 2, and we have 2 states, so the system is observable.

d) The kernel of the transient matrix is the set of vectors x such that (sI - A)x = 0. Let's solve this equation:

[s - 0   1] [x1] = [0]

[-8  s + 6] [x2]   [0]

From the first row, we have x2 = 0. Substituting this into the second row, we get -8x1 + (s + 6)x2 = 0. Since x2 = 0, we have -8x1 = 0, which implies x1 = 0.

Therefore, the kernel of the transient matrix is [0, 0]'.

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Answer:

y= ax^2 + bx + c although this is the quadratic form in standard form

Answer:

y = 4x - 5

Step-by-step explanation:

Since we already know the slope. You just have to plug the coordinates into the equation so far, y = 4x + b, to find out the y-intercept.

y = mx + b; m is the slope and b is the y-intercept.

7 = 4(3) + b

7 = 12 + b

-5 = b

So the equation is y = 4x - 5

Answer:

The constant of proportionality is 2.5. The equation that represents this proportional relationship is y=2.5x.

Step-by-step explanation:

to find the constant of proportionality -> for every time x goes up, what does y go up by? when x goes up by 2, y goes up by 5. difference of y/difference of x = 5/2 =2.5.

to find the equation -> y=?x. plug in the constant of proportionality in the question mark. so, y=2.5x.

Sure, I can help you with that! For the first graph, it's difficult to provide an answer without seeing the actual graph, but generally speaking, we need to determine the variable number, the type of data, and the purpose of the display. The variable number refers to the number of variables being represented in the graph, and the type of data refers to whether the data is qualitative or quantitative. The purpose of the display refers to what we're trying to communicate or show with the graph.

For example, if we were looking at a scatter plot, we could say that there are two variables being represented (x and y), the data is quantitative, and the purpose of the display is to show the relationship between the two variables.

Similarly, if we were looking at a bar graph, we could say that there is one variable being represented (the categories on the x-axis), the data is qualitative, and the purpose of the display is to compare the values of different categories.

In general, the choice of an appropriate graphical display will depend on the three factors mentioned earlier, so it's important to consider these factors when creating or interpreting a graph.

Answer:

option c is the correct answer

Answer:

5/6 is:

Rational

Step-by-step explanation:

Natural-All positive integers (5/6 does not apply)

Whole-All positive integers and zero (5/6 does not apply)

Integer- All positive and negative whole numbers and zero (5/6 does not apply)

Rational-All integers, fractions, and non-repeating decimals (5/6 applies)

Irrational-A real numbers that are NOT rational (5/6 does not apply)

27 containers are needed to hold all the fuel from 12 tanks.

We are given that each tank holds 22.5 cubic yard of fuel, the weight of 1 yd³ (cubic yard) of fuel is equal to .74 tons, and each container holds 7.4 tons of fuel. Solving this problem would involve converting units.

In order to find out how many containers of the size are needed to hold all the fuel from 12 tanks, first we need to find how much fuel is delivered by 12 tanks. Since 12 x 22.5 = 270, 12 tanks are used to deliver 270 yd³ of fuel.

Next we convert it to tons. Recall that 1 yd³ of fuel is equal to .74 tons. Therefore, 270 yd³ = 270 x  .74 = 199.8 tons.

A container holds 7.4 tons of fuel. 199.8 ÷ 7.4 = 27, hence 27 containers are needed to hold all the fuel.

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The required answer is the value of z-sub-c for a 94% level of confidence is approximately 1.88.

Explanation:-

To determine the value of z-sub-c (critical value) for a 94% level of confidence, we need to find the z-score that corresponds to a cumulative probability of 0.97 (since the confidence level is 94%).

The z-sub-c value can be obtained using statistical tables or a calculator. For a two-tailed test at a 94% level of confidence, the remaining probability is (1 - 0.94)/2 = 0.03.

Using a standard normal distribution table or a calculator, we can find that the z-score corresponding to a cumulative probability of 0.97 is approximately 1.88 (rounded to two decimal places).

Therefore, the value of z-sub-c for a 94% level of confidence is approximately 1.88.

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Based on the above, the equivalent equations are 4x = 15 and 4x - 15 = 0.Hence options A and C are correct.

To determine which equations are equivalent to 3x + 5 = 20 - x, we need to simplify and manipulate the original equation until it has the same form as the other equations. Here's how we can do it:

3x + 5 = 20 - x

Add x to both sides:

4x + 5 = 20

Subtract 5 from both sides:

4x = 15

So the equation 4x = 15 is equivalent to 3x + 5 = 20 - x.

Therefore, the other equations are not equivalent:

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Select all of the equations that are equivalent to 3x + 5 = 20 - x.

4x = 15

2x = 25

4x  - 15 = 0

-4x+20 = -5

x - 20 = 5 + 3x

Step-by-step explanation:

2x+15 = 5x-43

- Add 43 to both sides

2x+58 = 5x

- Subtract 2x from each side

58 = 3x

- Divide by 3

Answer:

linear. Each week adds another 10 dollars.

Step-by-step explanation:

Total = 340 +  10*w

w is the weekly amount

Suppose 5 weeks pass

Then the total amount in her bank account is

Total = 340 + 10*5

Total = 340 + 50

Total = 390

The equation is Linear.

In a simple linear regression model , if we change the input variable by 1 unit , output variable will change by its slope.

What is linear regression?

According on the value of another variable, a variable's value can be predicted using a linear regression analysis. The dependent variable is the one you're trying to forecast. The term "independent variable" refers to the variable you are using to forecast the value of the other variable.

Main Body:

For linear regression

Y=a + bx + error

If we neglect error

then Y=a + bx.

If x increases by 1

then Y = a +b(x+1) which implies

Y=a + bx + b.

So Y increases by its slope.

Hence their is an increase in the slope in y.

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To solve the initial value problem y" + 4y = 4u_n(t), where y(0) = 0 and y'(0) = 1, we will follow these steps:

a. Find the Laplace transform of the solution y(t).

The Laplace transform of the given differential equation can be obtained using the properties of the Laplace transform. Taking the Laplace transform of both sides, we get:

s^2Y(s) - sy(0) - y'(0) + 4Y(s) = 4U_n(s),

where Y(s) represents the Laplace transform of y(t) and U_n(s) is the Laplace transform of the unit step function u_n(t).

Since y(0) = 0 and y'(0) = 1, the equation becomes:

s^2Y(s) - s(0) - 1 + 4Y(s) = 4U_n(s),

s^2Y(s) + 4Y(s) - 1 = 4U_n(s).

Taking the inverse Laplace transform of both sides, we obtain the solution in the time domain:

y''(t) + 4y(t) = 4u_n(t).

b. Find the solution y(t) by inverting the transform.

To find the solution y(t) in the time domain, we need to solve the differential equation y''(t) + 4y(t) = 4u_n(t) with the initial conditions y(0) = 0 and y'(0) = 1.

The homogeneous solution to the differential equation is obtained by setting the right-hand side to zero:

y''(t) + 4y(t) = 0.

The characteristic equation is r^2 + 4 = 0, which has complex roots: r = ±2i.

The homogeneous solution is given by:

y_h(t) = c1cos(2t) + c2sin(2t),

where c1 and c2 are constants to be determined.

Next, we find the particular solution for the given right-hand side:

For t < n, u_n(t) = 0, and for t ≥ n, u_n(t) = 1.

For t < n, the particular solution is zero: y_p(t) = 0.

For t ≥ n, we need to find the particular solution satisfying y''(t) + 4y(t) = 4.

Since the right-hand side is a constant, we assume a constant particular solution: y_p(t) = A.

Plugging this into the differential equation, we get:

0 + 4A = 4,

A = 1.

Therefore, for t ≥ n, the particular solution is: y_p(t) = 1.

The general solution for t ≥ n is given by the sum of the homogeneous and particular solutions:

y(t) = y_h(t) + y_p(t)

y(t) = c1cos(2t) + c2sin(2t) + 1.

Using the initial conditions y(0) = 0 and y'(0) = 1, we can determine the values of c1 and c2:

y(0) = c1cos(0) + c2sin(0) + 1 = c1 + 1 = 0,

c1 = -1.

y'(t) = -2c1sin(2t) + 2c2cos(2t),

y'(0) = -2c1sin(0) + 2c2cos(0) = 2c2 = 1,

c2 = 1/2.

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The total number of possible outcomes in this situation is 3 x 4 x 2 = 24. This is because the spinner has three equal-sized sections, the die has 4 sides, and the coin has two sides (heads and tails).

Outcome is the result or consequence of an action, situation or event.

For the spinner, there are three possible outcomes (Walk, Run, and Stop). For the die, there are four possible outcomes (1, 2, 3, and 4). For the coin, there are two possible outcomes (heads or tails).

Therefore, the total number of possible outcomes is 3 x 4 x 2 = 24.

This means that there are 24 different combinations of outcomes that Kadeem can experience when spinning the spinner, rolling the die, and flipping the coin.

Let us imagine that Kadeem rolls a 4 on the die, lands on Walk on the spinner, and gets tails on the coin. In this scenario, the outcome would be 4-Walk-Tails.

In this scenario, the outcome would be 4-Walk-Tails.

This is just one of the 24 possible outcomes that Kadeem could experience.

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The graph that represents the systems of linear equations 2x - y ≥ -3 and y < -2x + 4 is option d

information gotten from the question include

inequality graph showing shaded regions

rearranging the equation to be in the form

y = mx + c

2x - y ≥ -3

2x + 3 ≥ y

y ≤ 2x + 3

The two equations are

y ≤ 2x + 3

y < -2x + 4

some interpretation on the information from the question include

The both inequalities are less than hence the shading for the both will be below the line

This interpretation helps to conclude that last options is the best choice

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The number of floors can this elevator travel directly up in 80 seconds is, 26 2/3 floors

The distance covered by the object is equal to the product of the speed at which the object is moving and time taken for covering the distance.

Distance = Time × Speed

We are given that the elevator travels 36 floors in 108 seconds, so the rate can be calculated as follows:

rate = 36 floors / 108 seconds

      = 1 floor / 3 seconds

To determine how many floors the elevator can travel in 80 seconds, we can use the rate and the formula: distance = rate x time:

distance = rate x time

distance = (1 floor / 3 seconds) x 80 seconds

distance = 80 / 3 floors

distance = 26 2/3 floors

So, the elevator can travel directly up 26 2/3 floors in 80 seconds.

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Answer:

Drake: 18

Josh: 11

Step-by-step explanation:

11*2=22

22-4 = 18

11+18= 29

To determine the probability that Paul will not eat the pizza Chef Carl has made, we need to calculate the probability of Chef Carl selecting mushrooms as one of the toppings.

First, let's calculate the total number of possible combinations of two different toppings that Chef Carl can choose from the given options. Since order does not matter, we can use the combination formula:

C(n, r) = n! / (r! * (n-r)!),

where n is the total number of options and r is the number of choices. In this case, n = 5 (the number of toppings) and r = 2 (the number of choices).

C(5, 2) = 5! / (2! * (5-2)!) = 5! / (2! * 3!) = (5 * 4) / (2 * 1) = 10.

So there are a total of 10 possible combinations of two different toppings that Chef Carl can choose.

Next, we need to calculate the number of combinations that include mushrooms. Since Paul will not eat pizza with mushrooms, we want to exclude this option.

To choose one topping from the remaining four (excluding mushrooms), there are C(4, 1) = 4 possible choices.

Therefore, the probability that Chef Carl selects a combination with mushrooms is 4/10.

Finally, the probability that Paul will not eat the pizza Chef Carl has made is the complement of this probability, which is 1 - 4/10 = 6/10 = 3/5.

So, the probability that Paul will not eat the pizza is 3/5.

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The main questions in the pre-lab assignment are:

1. What is/are the Question(s) of the Day?

2. Balance all five reactions listed in the procedure.

3. Write the chemical equation for the reaction of copper (II) hydroxide and hydrochloric acid to give copper (II) chloride and water.

4. Write the formula and name for the solid that copper (II) hydroxide becomes when heated.

5. Outline the key steps for properly using an analytical balance and indicate the number of decimal places that can be measured.

6. Calculate the percent recovery for a student who obtained 0.2331 grams of solid copper from a sample that initially weighed 0.3015 grams.

In the given pre-lab assignment, there are several questions and tasks related to the upcoming lab session on the chemical reactions of copper. The first question asks about the "Question(s) of the Day," which is not explicitly mentioned in the provided text. It might refer to the specific focus or objectives of the lab session.

The second task requires balancing all five reactions listed in the procedure, which is expected to be completed in the designated procedure section of the assignment, not in this particular section.

The third question asks to write the chemical equation for the reaction between copper (II) hydroxide and hydrochloric acid, producing copper (II) chloride and water. This reaction is an example of an acid-base reaction. In the equation, it is important to label the acid and base reactants.

The fourth task involves writing the formula and name for the solid that copper (II) hydroxide becomes when heated. The provided information does not mention the exact outcome, so it might be necessary to refer to additional resources or experimental data to determine the formula and name of the resulting solid.

The fifth task is to outline the key steps for properly using an analytical balance. The explanation should also include the number of decimal places that can be measured with this type of balance. It is important to follow the guidelines provided in the video posted on Brightspace, which will likely cover the necessary steps for accurate measurements using an analytical balance.

The final task involves calculating the percent recovery for a student who obtained 0.2331 grams of solid copper from a sample initially weighing 0.3015 grams. The formula for percent recovery is determined by dividing the actual yield (0.2331 g) by the theoretical yield (0.3015 g) and multiplying by 100%. The resulting percentage indicates how successful the student was in recovering the copper.

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The range of the data is R = 9

Given data ,

Let the range of the data be R

Now , the value of R is R = maximum value - minimum value

Let the data be A = { 5, 9.5, 3, 12, 6, 8, 4.5, 10, 6.5 }

The range of a set of data, we need to subtract the minimum value from the maximum value.

The minimum value in this set of data is 3 (which occurs in the third week), and the maximum value is 12 (which occurs in the fourth week).

Therefore, the range is:

range = maximum value - minimum value = 12 - 3 = 9

Hence , the value of the range for this set of data is 9

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