Use the equation to answer the question.
-(t+2) = -31 +23
What value of t makes the equation true? Enter the answer in the box.

Answer:5.28571428571

Step-by-step explanation:

Answer:

              (3.18 + 5.7)/(0.3 * 5.6) is approximately equal to 5.29.

Step-by-step explanation:

              Following the order of operations, first we must calculate the values inside the parenthesis. The numerator will become 3.18 + 5.7 = 8.88, and the denominator will become 0.3 * 5.6 = 1.68. Now we can rewrite the fraction as [tex]\frac{8.88}{1.68}[/tex], and divide to get the final answer, which is 8.88 ÷ 1.68 ≈ 5.29. So the answer to the expression above is approximately 5.29.

Have a great day! Feel free to let me know if you have any more questions :)

This is a Placebo-controlled study .A form of experimental design used in medical research to evaluate the efficacy of a novel medication or treatment is the placebo-controlled study.

Participants in the study are divided into two groups: the experimental group receives the new medicine under study, while the control group receives a placebo (the control group). The placebo is typically an inert chemical that mimics the real drug but has no therapeutic benefit, like a sugar pill

In this kind of study, the use of a control group is done to separate the effects of the medicine under test from other variables that might affect the results.

Researchers can compare the outcomes of the two groups to ascertain whether the new medication actually treats the illness of interest or whether any reported effects are caused by the placebo effect, other variables, or the disease's natural development.

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The function is increasing over the interval from x=3 to x=5.

First we draw the graph of function g(x) = 8x

The graph of the function g(x) = 8x is shown below.

We can observe that the graph of g(x) is a staright line passing through origin (0, 0)

Now we find the value of the function at the endpoints of the interval [3, 5]

For x = 3, the value of function would be,

g(3) = 8 × 3

g(3) = 24

And for x = 5, the value of g(x) would be,

g(5) = 8 × 5

g(5) = 40

Also, at x = 4,

g(4) = 8 × 4

g(4) = 32

This means that the value of function g(x) increases from x = 3 to x = 5

Also, from the graph the function g(x) we can observe that the function g(x) is increasing over the interval [3, 5]

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The probability of a student being chosen at random and taking exactly one language class is 65%.

Probability is the likelihood or chance of an event happening. In this case, the event is a student taking exactly one language class.

First, we need to find the total number of students taking at least one language class. We have 28 students in the Spanish class, 26 students in the French class, and 16 in the German class. However, some students are taking multiple classes, so we need to subtract these students from the total. The 12 students taking both Spanish and French, 4 taking both Spanish and German, and 6 taking both French and German should only be counted once. In addition, the 2 students taking all three classes should also only be counted once.

So, the total number of students taking at least one language class is

=> 28 + 26 + 16 - 12 - 4 - 6 + 2 = 40 students.

To find the number of students taking Spanish only, we need to subtract the number of students taking both Spanish and French (12) and the number of students taking both Spanish and German (4) from the number of students taking Spanish (28).

So, the number of students taking Spanish only is

=> 28 - 12 - 4 = 12 students.

Similarly, the number of students taking French only is

=> 26 - 12 - 6 = 8 students

and the number of students taking German only is

=> 16 - 4 - 6 = 6 students.

Finally, to find the probability of a student being chosen at random and taking exactly one language class, we divide the number of students taking exactly one language class by the total number of students taking at least one language class.

So, the probability of a student taking exactly one language class is

=> (12 + 8 + 6) / 40 = 26 / 40 = 0.65 or 65%.

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Complete Question:

An elementary school is offering 3 language classes: one in Spanish, one in French, and one in German. The classes are open to any of the 100 students in the school. There are 28 students in the Spanish class, 26 students in the French class,, and 16 in the German class. There are 12 students that are in both Spanish and French, 4 that are in both Spanish and German, and 6 that are in both French and German. In addition, there are 2 students taking all 3 classes.

If a student is chosen randomly, what is the probability that he or she is taking exactly one language class?

The measurements of the given sides are x = 24, y = 40, and z = 40.

The triangle in which at least one right angle exists is known as a Right angle triangle.

By the Pythagorean theorem in a right angle triangle, the sum of the squares of sides will equal the square of the hypotenuse.

The altitude drawn on a hypotenuse will divide the triangle into two similar triangles

Here we have

Two right-angle triangle  

As we know in right angle triangle,

=> Hypotenuse² = Side² + Side²  

From the smaller right-angle triangle,

=> y² = (32)² + (24)²  

=> y² = 1024 + 576  

=> y² = 1600

=> y = 40    

Here the altitude drawn on the hypotenuse of the triangle divides the triangle into two similar triangles

Hence, the ratio of the corresponding angles in two triangles will be equal  

=> 32/x =  32/24  

=> 24(32) = 32(x)

=> x = 24

In 2nd largest triangle,  

=> z² = (32)² + (24)²  

=> z² = 1024 + 576

=> z² = 1600  

=> z = 40  

Therefore,

The measurements of the given sides are x = 24, y = 40, and z = 40.

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Answer:

450

Step-by-step explanation:

the speed of mass is 450

Here's a dot plot for the number of losses for each season for the Minnesota Igloos:

 9  |  *

 10 |  *  *

 11 |  *  *  *

 12 |  *  *

Each dot represents a season, and the vertical axis represents the number of losses. The seasons with the same number of losses are stacked on top of each other.

To create the dot plot, I followed these steps:

By following these steps, I was able to visually represent the distribution of the number of losses for each season for the Minnesota Igloos in the form of a dot plot.

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Point slope form is y - y1 = m ( x - x1 ), where m represents the slope, y1 represents the y value of the point, and x1 represents the x value of the point.

filling in the variables with the given information gives you

y - (-5) = -1 ( x - 1 ) which is also y + 5 = -1 ( x - 1)

Mantago should borrow the money for 72.7 months or approximately 6 years,

We can use the following formula to determine the loan length:

Loan length = Loan amount / (Monthly payment - Monthly interest payment)

We must first determine the monthly interest payment, which may be done by applying the following formula:

Monthly interest payment = (APR / 12) * Loan amount

Plugging in the values:

Monthly interest payment = (7.5 / 12) * $10,000 = $62.5

The values can now be entered into the calculation to determine the length of the loan:

Loan length = $10,000 / ($200 - $62.5) = $10,000 / $137.5 = 72.7 months

Therefore, Mantago should borrow the money for 72.7 months, or approximately 6 years, in order to afford the monthly payment of $200.

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The percent decrease in price of video game was equals to the 34% .

When Iris purchased, the price of video game is $85. That is original price of video game = $85

The selling price of video game = $56

As we see Selling price < Original price

=> loss or decrease

Let the decrease in price be "x".

Decrease in value is equals to original price minus selling price.

=> x = $85 - $56 = $29

Now, percent decrease is obtained by dividing the decrease in price by original price, then multiply the resultant by 100.

Decrease percent = decreased price/original price)100

=> x% = (29/85)100

=> x% = 2900/85

=> x% = 34.117

Hence, the required percent decrease is 34%.

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The slope coefficient in a regression model represents the change in the response variable for a one-unit change in the predictor variable, holding all other predictors constant.

The significance of the slope coefficient is determined by the p-value associated with it in the regression output. A p-value less than 0.05 indicates that the slope coefficient is significantly different from zero at a 5% level of significance, meaning that the predictor variable has a significant effect on the response variable. A p-value greater than 0.05 suggests that the predictor variable does not have a significant effect on the response variable.

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Complete Question:

What is the slope coefficient? Is this coefficient significant at a 5% level of significance (alpha=0.05)?

The minimum sample size needed is 193.

A preliminary estimate, also known as a preliminary budget or a rough estimate, is an early approximation of the cost or resources required for a project, program, or activity. It is made before a more detailed and accurate assessment is completed and is used to help make initial decisions and allocate resources.

A preliminary estimate is typically made based on available information and expert judgment, and it can be subject to revision as more information becomes available. It is an important tool for project planning, as it helps to establish a baseline for the cost or resource requirements of a project and provides a basis for making decisions about the feasibility and scope of the project.

A preliminary estimate can also be used to secure funding, establish project schedules, and identify potential risks and challenges. It is important to note that a preliminary estimate is not a final or binding commitment, and that the actual cost or resource requirements of a project may differ from the preliminary estimate.

a) No preliminary estimate is available:

The formula for minimum sample size for estimating a proportion with a margin of error and a given level of confidence is:

n = (Z² × p × (1 - p)) / E²

Where:

Z = the Z-score that corresponds to the desired level of confidence (95% confidence corresponds to a Z-score of 1.96)

p = estimated proportion (since no preliminary estimate is available, a commonly used value is 0.5)

E = desired margin of error (3%)

Plugging in the values, we get:

n = (1.96² × 0.5 × (1 - 0.5)) / (0.03²) = 384

So, the minimum sample size needed is 384.

b) Using a prior study that found 26% of the respondents said they planned to travel outside the US:

Plugging in the prior estimate of p = 0.26 and the same Z and E values as above, we get:

n = (1.96² × 0.26 × (1 - 0.26)) / (0.03²) = 193

So, the minimum sample size needed is 193.

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Answer: 50%

Step-by-step explanation: There is an equal chance of both events occurring so there is a half chance for it to occur or no.

Answer:

Step-by-step explanation:

The slope of the line passing through the points (0,2) and (6,6) can be found using the slope formula:

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

where (x1, y1) = (0, 2) and (x2, y2) = (6, 6)

slope = (6 - 2) / (6 - 0)

slope = 4 / 6

slope = 2/3

Therefore, the slope of the line is 2/3.

The value of the expression x²+1/x²  is 18

An algebraic expression in mathematics is an expression which is made up of variables and constants, along with algebraic operations (addition, subtraction, etc.). Expressions are made up of terms.

Given here: x²-4x=1

simplifying we get

x²-4x=1

Dividing both sides by x we get

x²/x-4x/x=1/x

x-4=1/x

x-1/x=4

Now squaring both sides we get

(x-1/x)²=4²

x²-2×x×1/x+1/x² =16

x²+1/x²=16+2

x²+1/x²=18

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There are 5040 ways to arrange these seven leaders in a row. There are 1440 ways to arrange these seven leaders in a row, so that the leader of japan and the leader of canada stand next to each other.

Using the multiplication principle, we multiply all the possible arrangements to determine the total number of configurations if we have seven individuals and want to know how many ways there are to place them in a row of seven seats. For instance, the first seat has seven alternatives, the second has six (as one has been taken), the third has five, the fourth has four, and so on.

So, these seven leaders in a row, so that the leader of japan and the leader of canada stand next to each other.

6! * 2! = 720 * 2 = 1440 .

To arrange these seven leaders in a row we just have to find,

7! = 7x6x5x4x3x2x1

= 5040

These two configurations are both permutations. Therefore, in the case, there are only two potential permutations.

It becomes more difficult if there are seven of us. The multiplication concept must be applied.

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The number 5 will be placed in the middle.

In order to make the sums across and down equal, we have to arrange the numbers in such a way that they balance each other out. We know that the middle number will be the average of the four numbers surrounding it.

So, if we place 2 and 8 on either side of the middle number, the sum of these two numbers is 10. To make the sum equal, we need two more numbers that add up to 10. The only two numbers that fit the criteria are 4 and 6.

Hence, the middle number will be the average of 4 and 6, which is 5. So, the answer is 5.

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--The given question is incomplete; the complete question is

"Place the numbers 2, 4, 5, 6, and 8 in the circles so that the sums across (horizontally) and down (vertically) are equal. Which number will you place in the middle?"--

By applying total cost concept, it can be concluded that the expression represents the total cost is 1.45d (option A).

Algebra is a branch of mathematics that uses symbols and mathematical operations, such as addition, subtraction, multiplication, and division to solve problems.

It is usually used to solve a problem in various fields of study, such as chemistry, biology, economics, and so on.

One of the most familiar uses of algebra is how to calculate the total cost:

Total cost = n x p , where:

n = number of products

p = product price per piece

We know that Jim is going to buy donuts for his family:

p = $1.45

n = d

So the total cost can be calculated by multiplying 1.45 by d, which equals 1.45d.

Thus the expression represents the total cost is 1.45d (option A).

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Answer:

Step-by-step explanation: So, you have to find a number that can be multiplied both by 4 and 3 to get x and 21. So x is 28, 4:3 = 28:21, you can multiply both by 7.

The number of visits to the Craft Depot in which you'll receive a free craft kit and the discount of $6 is 15 visits.

On every 3rd visit= a Free craft

On every fifth visits = a discount of $6

Based on the given task content; it can be solved using the concept of lowest common multiple of both third visit and fifth visit.

3 = 3, 6, 9, 12, 15, 18

5 = 5, 10, 15, 20

The lowest common multiple of third and fifth visits is 15 visits.

Therefore, you'll receive a free craft kit and the discount on the 15th visits

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The precise quadratic equation, according to the provided assertion, is y = (1/9)x² + (2/9)x - 1/3.

Three elements decide a quadratic function of the formula f(x) = ax² + bx + c. A quadratic function can be determined by getting a, b, and c algebraically given three locations on the graph. In order to do this, a system of eqs with three unknowns must be solved.

To find the quadratic function that passes through the point (-8, 5) and has zeros at x = -3 and x = 1, we can start by using the factored form of a quadratic function:

y = a(x - r)(x - s)

where r and s are the zeros of the function. Substituting in the given zeros, we get:

y = a(x + 3)(x - 1)

To find the value of a, we can use the fact that the function passes through the point (-8, 5). Substituting these values into the equation, we get:

5 = a(-8 + 3)(-8 - 1)

Simplifying this expression, we get:

5 = a(-5)(-9)

5 = 45a

a = 1/9

Substituting this value of a into the equation we get:

y = (1/9)(x + 3)(x - 1)

Expanding the equation, we get:

y = (1/9)(x² + 2x - 3)

Multiplying both sides by 9 to eliminate the fraction, we get:

9y = x² + 2x - 3

So the quadratic function that passes through the point (-8, 5) and has zeros at x = -3 and x = 1 is:

9y = x² + 2x - 3

or

y = (1/9)x² + (2/9)x - 1/3.

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The truth table for the statement is

r     s     ¬r    s ∧ ¬r

---------------------

T     T     F     F  

T     F     F     F  

F     T     T     T

F     F     T     F

From the question, we have the following parameters that can be used in our computation:

s ∧ ¬r

To construct the truth table, we make use of the following notations

s, r and ¬r

The truth table for the statement s ∧ ¬r is then represented as follows:

r     s     ¬r    s ∧ ¬r

---------------------

T     T     F     F  

T     F     F     F  

F     T     T     T

F     F     T     F

The condition for ∧ is that it is true if both statements are true

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Answer:

The solution to this system of linear equations is (x, y) = (8, 6)

Step-by-step explanation:

We can solve this system of linear equations using substitution. To start, we'll isolate one of the variables in one of the equations, then substitute that expression into the other equation.

Starting with the first equation, we'll isolate x:

4x - 2y = 20

4x = 20 + 2y

x = 5 + 0.5y

Next, we'll substitute this expression for x into the second equation:

x - 4y = -16

5 + 0.5y - 4y = -16

5 - 3.5y = -16

Adding 3.5y to both sides:

5 = 3.5y - 16

Adding 16 to both sides:

21 = 3.5y

Finally, dividing both sides by 3.5:

y = 6

So, the value of y is 6. To find x, we can substitute this value back into the expression we found earlier:

x = 5 + 0.5y

x = 5 + 0.5(6)

x = 5 + 3

x = 8

So, the solution to this system of linear equations is (x, y) = (8, 6).

Answer:

(8, 6)

Step-by-step explanation:

Given system of linear equations:

[tex]\begin{cases}4x - 2y = 20 \\x - 4y = -16\end{cases}[/tex]

Rearrange the second equation to isolate x:

[tex]\implies x=4y-16[/tex]

Substitute the found expression for x into the first equation and solve for y:

[tex]\implies 4(4y-16)-2y=20[/tex]

[tex]\implies 16y-64-2y=20[/tex]

[tex]\implies 14y-64=20[/tex]

[tex]\implies 14y=84[/tex]

[tex]\implies y=6[/tex]

Substitute the found value of y into the expression for x and solve for x:

[tex]\implies x=4(6)-16[/tex]

[tex]\implies x=24-16[/tex]

[tex]\implies x=8[/tex]

Therefore, the solution to the given system of linear equations is (8, 6).

The required number of workers need to  to add 4 more workers to complete the work in 30 days.

To determine how many more workers are needed to complete the work in 30 days, we first need to calculate the daily work rate for 15 workers.

If 15 workers can complete the work in 36 days, then their daily work rate is =15 workers * 1 day/36 days

= 15/36 workers per day.

Next, we need to determine how much work needs to be done in 30 days.

This can be calculated by multiplying the daily work rate by the number of days:

15/36 workers per day * 30 days

= 10.5 workers.

Since we can't have fractional workers, we round up to 11 workers.

So, we need

11 - 15 = -4 more workers to complete the work in 30 days.

Since we cannot have negative workers, we actually need to add 4 more workers to complete the work in 30 days.

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The dimensions of furniture in a rectangular bedroom in my scale drawing is equals to the 18 in. by 21 in.

To draw dimensions on scale drawing :

I want to a scale drawing of my bedroom which help me to arrange my furniture.

Dimensions of rectangular bedroom= 12 ft by 15 ft

that is length of room, l = 15 ft

width of rectangle room, w = 12 ft

Area of rectangular bedroom = l×w = 12 × 15

= 180 ft²

scale of furniture = 3 in. = 2 ft

=> 2 ft = 3 in

=> 1 ft = 3/2 in

Now 12 ft by 15 ft in inches :

=> 12 × 3/2 in by 15 × 3/2 in

=> 18 in by 22.5 in

Hence, required dimensions are 18 inches by 22.5 inches.

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36.75 is the sum of infinite geometric series .

What are geometric series that are finite and infinite?

The total of a finite set of terms is known as a finite series. An infinite series has an infinitely large term count and an infinitely high upper bound. Infinite series include, for instance, n=110(12)n1.

                             The sigma notation is followed by the infinity symbol, which denotes the endless nature of the series.

The formula for the sum of infinite geometric series is

                                  S = a/1 - r

          r - common ratio. |r|<1.

Here, a = first term = 21.

         r - common ratio = 0.4285

        Substituting the values in the formula, we get,

          s = a/1 - r

            = 21/(1 - 0.4285 ) = 21/0.5715

                = 36.75

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Both BODMAS and PEMDAS are valid and in use in various parts of the globe. In the UK, BODMAS is frequently utilized, whereas in the US, PEMDAS is. Brackets, Order, Division, Multiplication, Addition, and Subtraction are all referred to as BODMAS.

The acronym PEMDAS, which stands for parenthesis, exponents, multiplication and division from left to right, as well as addition and subtraction from left to right, can be used to recall the order of operations. Start by using parenthesis first.

For the list of operations, we wish to create an expression.

9 to the second power raised then, determine the ratio between the outcome and z

First, raise 9 to the second power.

9 divided by two equals

Find the product of the result and z in step two.

Today, quotient refers to "division."

The outcome of step 1 is =[tex]9^2[/tex]

Therefore:

Indicator of and z

As a result, the statement that describes the specified order of operations is [tex]\frac{9^2}{z}[/tex]

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