Will give brianliest

Answer:

9x²-9x-6

Step-by-step explanation:

f(x)=3x+ 1

g(x)=x² -5x -2

g(f(x))=g(3x+1)              ∵f(x)=3x+1

        =(3x+1)²-5(3x+1)-2

        =9x²+1+6x-15x-5-2      ∵(a+b)²=a²+b²+2ab

        =9x²-9x-6 or 3(3x²-3x-2)

Answer:

b*34

Step-by-step explanation:

an expression does not include an equal sign but an equation does

Using it's formula, it is found that the standard error of the difference of sample means is of 0.443.

The standard error for each sample is given by the sample standard deviation divided by the square root of the sample size, hence:

\(s_C = \frac{2.9}{\sqrt{50}} = 0.41\)

\(s_A = \frac{1.3}{\sqrt{60}} = 0.168\)

For the distribution of the difference of sample means, the standard error is the square root of the sum of the standard error of each sample squared, hence:

\(s = \sqrt{s_C^2 + s_A^2} = \sqrt{0.41^2 + 0.168^2} = 0.443\)

The standard error of the difference of sample means is of 0.443.

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Answer:

A.) 0.2

B.) 3.2

C.) 0.4

D.) 0.5

Step-by-step explanation:

Arrival rate, λ = 8 per hour

Service rate, μ = 10 boats per hour

1.)

Probability that boat dock will be idle, P0:

P0 = 1 - λ/μ

P0 = 1 - 8/10

P0 = 1 - 0.8

P0 = 0.2

Average number of boats waiting for service :

Lq = λ² ÷ μ(μ - λ)

Lq = 8² ÷ 10(10- 8)

Lq = 64 ÷ 10(2)

Lq = 64 ÷ 20

Lq = 3.2

Average time spent waiting for service, Wq :

Wq = λ ÷ μ(μ - λ)

Wq = 8 ÷ 10(10- 8)

Wq = 8 ÷ 10(2)

Wq = 8 / 20

Wq = 0.4 hour

Wq = 0.4 * 60 = 24 minutes

Average time spent at the dock :

1 ÷ (μ - λ)

1 ÷ (10 - 8)

1 ÷ 2

= 0.5 hour

= 0.5 * 60 = 30 minutes

Time can be used to quantify, contrast, or even rank the length of events or the gaps between them. To complete the cooking at 2:00 PM, George needs to start his cooking at  12:30 PM.

Time can be defined in mathematics as an ongoing and continuous series of events that take place one after another, from the past through the present and into the future. The duration of events or the gaps between them can be calculated, compared, or even ordered utilizing time.

Given time needed for each meals are;

Turkey = 70 min

Pumpkin pie = 17 min

Rolls = 30 sec

coffee = 45 sec

Total time = 87 min 75 sec

                = 1 hour 27min 75 sec

So in order to complete the cooking at 2:00 PM, George needs to start his cooking at  12:30 PM.

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Answer:

sorry I don't know the answer

The answer d because it is the only option that describes a circle with a center at (-7, 2) and a radius of 10. d (x − 7)² + (y + 2)² = 10

The standard form of a circle equation is (x - h)² + (y - k)² = r², where (h, k) represents the coordinates of the center of the circle and r is the radius.

From this equation we can see that the x-coordinate of the center is equal to h and the y-coordinate is equal to k.

In answer d, the x-coordinate of the center is -7, and the y-coordinate is +2. This means that the center of the circle is located at (-7, 2).

The radius of the circle is given by the value of r, which is equal to 10.

Therefore, answer d is the correct answer because it is the only option that describes a circle with a center at (-7, 2) and a radius of 10.

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The correct statement is that for each hour, the earnings go up by $7. Option A

If we have the equation of the line, we can substitute the value of 7 for the number of hours into the equation and solve for the earnings. The equation would typically be in the form of "earnings = slope * hours + y-intercept," where the slope represents the rate of earnings per hour and the y-intercept represents the earnings when no hours are worked.

We can find the slope of the graph to know as said above;

m = y2 - y1/x2 - x1

m = 14 - 0/2 - 0

m = 7

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The Propositions are resulting

(a) ∀x∃y(x = y²) is False

(b) ∀x∃y(x² = y) is True.

(c) ∃x∀y(xy = 0) is True.

(d) ∀x∃y(x + y = 1) is True.

(a) ∀x∃y(x = y²)

This proposition states that for every x, there exists a y such that x is equal to y². To determine the truth value, we need to check if this statement holds true for every value of x.

If we take any positive value for x, we can find a corresponding value of y that satisfies the equation.

For example, if x = 4, then y = 2 satisfies the equation since 4 = 2². Similarly, if x = 9, then y = 3 satisfies the equation since 9 = 3².

Therefore, the proposition (a) is false.

(b) ∀x∃y(x² = y)

For any given positive or negative value of x, we can find a corresponding value of y that satisfies the equation.

For example, if x = 4, then y = 2 satisfies the equation since 4² = 2. Similarly, if x = -4, then y = -2 satisfies the equation since (-4)² = -2.

Therefore, the proposition (b) is true.

(c) ∃x∀y(xy = 0)

The equation xy = 0 can only be satisfied if x = 0, regardless of the value of y. Therefore, there exists an x (x = 0) that makes the equation true for every y.

Therefore, the proposition (c) is true.

(d) ∀x∃y(x + y = 1)

To determine the truth value, we need to check if this statement holds true for every value of x.

If we take any value of x, we can find a corresponding value of y that satisfies the equation.

For example, if x = 2, then y = -1 satisfies the equation since 2 + (-1) = 1. Similarly, if x = 0, then y = 1 satisfies the equation since 0 + 1 = 1.

Therefore, the proposition (d) is true.

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Answer:

54

Step-by-step explanation:

multiply 9 and 7 which is 63. then multiply 63 by 150 which is 9,450. then multiply 25 and 7 which is 175. then divide 175 and 9,450. and the answer is 54. Yw!!

We need to write and solve an algebraic equation to find the final company's balance.

The answer is: The final balance is -$275.

Let's see how to get that.

First, we know that the company earns $150 per week for 9 weeks, then the total amount of money that the company earns in these 9 weeks is:

$150*9 = $1,350

Then the company losses $65 per week for 25 weeks, then the amount that the company losses is:

$65*25 = $1,625

The final balance will be the difference between what the company earned and what the company lost, then the final balance is:

balance = $1,350 - $1,625 = -$275

This means that the company's final balance is -$275.

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Answer:

b

Step-by-step explanation:

as 2.5 × 10-^5 is 250000 and b is 3100 and if you do 10-5 + 10-3 it is 10-8 which will give u 0.0008cm I think if my calculations r correct

Answer:

a

Step-by-step explanation:

just did it and got right

The graph of the given equation is given at end.

A graph is a graphic depiction or diagram that displays data in an organized manner. The points on a graph are typically used to depict the relationships between two or more things.

Determine the slope and y-intercept first, then put the equation in y-intercept (y=mx+b) form to get the equation of a graphed line. The y-to-x change ratio is known as the slope. The two locations you locate on the line should be connected by a sloping triangle.

Common graph types include line graphs, bar graphs, pie charts, scatter plots, and histograms. Graphs are an excellent tool for visualizing data and presenting statistics. An example of displaying numerical data is with a bar graph or chart.

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Answer:

To answer your question use the code ICE on here to get your answer works every time for me hope this helps

The display that is least likely to be useful to readers for the purpose of comparing salary increases between employees who are in the mayor's party and those who are not is option C, parallel boxplots.

Parallel boxplots show the distribution of data separately for two or more groups, but they do not allow for direct comparison between the groups. To compare the salary increases between the two groups, it would be more useful to use a display that allows for direct comparison, such as a back-to-back stemplot (option A), scatterplot (option B), histogram (option D), or dotplot (option E) drawn to the same scale.

Salary is a form of payment for work that is typically paid on a regular basis, such as weekly, biweekly, or monthly. Salaries are usually paid in the form of money and are typically based on the number of hours worked, the level of responsibility of the job, and the level of skill or experience required to perform the job.

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Answer: see photo below (used chain rule)

Basically,  Least Common Multiple(LCM) is a method to find the smallest common multiple between any two or more numbers. A common multiple is a number which is a multiple of two or more numbers. GCF/HCF ( Greatest/Highest Common Factor) is the highest number that divides exactly into two or more numbers.

Answers:

9) LCM of 36, 3, 12 = 36

   GCF of 36, 3, 12 = 3

10) LCM of 6, 54, 12 = 108

     GCF of 6, 54, 12 = 6

11) LCM of 16, 8, 12 = 48

   GCF of 16, 8, 12 = 4

Answer:

There is 5 main steps.

Step-by-step explanation:

Each Null Hypothesis is stated.

Define the Alternate Assumption.

Set degree of importance

Determine the statistics for the evaluation and the accompanying P-value.

A Hypothesis and summary drawing.

Given the triangles are similar, the pair of corresponding sides are proportional.

Then,

Knowing that:

AB = 30

ED = 5

BC = 42

EF = x

Substituting the values:

Multiplying both sides by x and then dividing the sides by 6.

Answer: x = 7.

Answer:

Step-by-step explanation:

5/3 *2=10/6

10/6-6/6=4/6

The question is an illustration of combination.

There are 5005 ways the volunteers can be selected

The given parameters are:

Since there is no restriction, as to who can be selected;

The total number of selection is calculated using the following combination formula

\(^nC_r = \frac{n!}{(n -r)!r!}\)

Where:

\(n = 5 + 10=15\)

\(r = 6\)

So, we have

\(^{15}C_6 = \frac{15!}{9!6!}\)

This gives

\(^{15}C_6 = 5005\)

Hence, there are 5005 ways the volunteers can be selected

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Answer:

30

Step-by-step explanation:

Solve for n: 0.22n = 6.6.

​

Answer:

y = -3x + 2

Step-by-step explanation:

y2 - y1 / x2 - x1

8 - (-1) / -2 - 1

9/-3

= -3

y = -3x + b

-1 = -3(1) + b

-1 = -3 + b

2 = b

Answer:

1/2

Blue balls      = 6

Red balls       = 5

Yellow balls  = 5

Green balls   = 4

6+5+5+4=20 | 10/20 = 1/2 or 0.5

Answer:

इएइहेइएबे!!न्बेओएहेजेने

Answer:

30

Step-by-step explanation:

Answer:

x>_-1

Step-by-step explanation:

x is such that x is greater or equal to -1

Answer:

88.76%

Step-by-step explanation:

Given that :

Half life of radium = 1599 years

Percentage that will remain after 275 years

Using the relation :

y = Ae^kt

Where ; A = mass of radium and t = half life = 1599, A = initial mass

By 1599, the mass of radium will be half its initial

Hence,

y = initial / 2 = A /2

A/2 = Ae^kt

To obtain the value of k

0.5 = e^1599k

In0.5 = 1599k

k = (In0.5)/1599

k = - 0.0004335

Hence,

y = Ae^-0.0004335t

Amount of radium. After 275 years : t = 275

y = Ae^-0.0004335*275

y = A0.8876191

y = 0.8876191 of intial amount

Hence, 0.8876191 * 100%

= 88.76%

Value of the expression 4n - 5r when n = -2 and r = 3 is -23.

The surface area in square feet rectangular prism when s=4 feet and h=6feet is 128 square feet.

What do you mean by algebraic expression?

The concept of algebraic expressions is the use of letters or alphabets to represent numbers without providing their precise values. We learned how to express an unknown value using letters like x, y, and z in the fundamentals of algebra. Here, we refer to these letters as variables. Variables and constants can both be used in an algebraic expression. A coefficient is any value that is added before a variable and then multiplied by it.

Given expression:

4n - 5r

When n = -2 and r = 3

The value of the expression become,

4(-2) - 5(3)

= -8 - 15

= -23

Hence, option D is correct.

Now, it is given that the surface area for a rectangular prism with a square base is given by the expression 2s²+4sh, where s is the side length of the square h is the height of the prism.

The surface area in square feet rectangular prism when s=4 feet and h=6feet is

2\((4)^{2}\) + 4(4)(6)

= 2(16) + 96

= 32 + 96

= 128 square feet

therefore, the surface area in square feet rectangular prism when s=4 feet and h=6feet is 128 square feet.

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Answer:

The answer is 4.9*10^-3 because you are making the number bigger not smaller

Step-by-step explanation: