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A school is raising money to build a new auditorium! It costs $6,500 to hire a worker to put in new floors in the auditorium. The other information about the cost of the project is below:

The teachers have already raised $500.

There are twelve teachers trying to help the school raise money and each teacher raises the same amount of money.

The teachers organize a car wash and earn $10 for each car they wash.


How many cars must each teacher wash to raise enough money to complete the new auditorium?

To solve a 2x2 matrix equation of the form Ax = b, where A is a 2x2 matrix, x is the variable (a column vector), and b is a known column vector.

You can use the following steps:

A^(-1) = (1/det(A)) * adj(A)

where det(A) is the determinant of matrix A and adj(A) is the adjugate of matrix A. The transposition of a matrix's cofactor matrix is adjugate. The cofactor matrix is a matrix of the determinants of the minors of the original matrix, each of which is multiplied by a cofactor (-1)^(i+j). The minors of a matrix are the determinants of the square submatrices formed by deleting one row and one column from the matrix. The determinant of a matrix is a scalar value that can be computed from its elements.

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The Range={0, 1, 2, 3, 4, 5}

Domain={0, 2, 4, 6, 8, 10}

So, options A and E are correct.

Its arguments are a group of values that can be plugged into a function's domain. This set includes the x values for a function like f(x). Its range refers to the set of digits that the function considers. The function prints these values in the order they are entered after the insertion of an x value.

Another approach to defining the scope and range of functions is through the use of graphs. Since "domain" refers to the set of possible input values, the full set of input values shown on the x-axis is the domain of a graph. On the y-axis, the range's varied output values are visible.

From the graph the points are (0, 0), (1, 2), (2,4), (3,6), (4,8), (5,10)

So,  Range={0, 1, 2, 3, 4, 5}

Domain={0, 2, 4, 6, 8, 10}

Therefore, options A and E are correct.

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The probability of Kayla scoring above 70% on exactly three out of the four tests is 8.64%.

Probability

Given that the probability Kayla will score above 70% on a mathematics test is 0.60, and Kayla will take four tests this semester, and we want to find the probability she will score above 70% on exactly three out of the four tests, to determine what is the probability of Kayla scoring above 70% on exactly three out of the four tests, the following calculation must be performed:

0.6 x 0.6 x 0.6 x 0.4 = X

0.216 x 0.4 = X

0.0864 = X

0.0864 x 100 = 8.64

Therefore, the probability of Kayla scoring above 70% on exactly three out of the four tests is 8.64%.

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Answer:

10

Step-by-step explanation:

30-25=5

10-5=5

30:10

25:5

The answer is data labels tool.Data Labels tool is used make chart 1 look like chart 2.When you select the chart and right click and select the option to add data labels.So the required labels will be displayed.

A chart is a visual display of data in which the data is displayed by symbols such as bars in a bar chart or lines in a chart.It can help people to understand information easily.

There are following types  of charts.

column charts

line charts

bar  charts

area charts

pie charts

Now for opening chart tools in excel.you can

click the insert tab and then click the arrow next to chart.click chart type and then double click the chart you want to add.So you can insert chart into excel sheet.

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The value of p in the equation p - 6 = -14 is -8.

An equation is the statement that illustrates the variables given. In this case, two or more components are taken into consideration to describe the scenario.

In this situation, the difference between a number p and 6 is -14.

It should be noted that the equation van be illustrated as:

p - 6 = -14

Collect like terms

p = -14 + 6

p = -8

The value of p is -8.

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The first 10 multiples of 42 are as follows:

42, 84, 126, 168, 210, 252, 294, 336, 378, 420.

In mathematics, multiplying any number by integer results in a multiple.

In other terms, it can be argued that b is a multiple of the supplied two numbers, a, and b if b = na for some integer n, known as the multiplier.

This is comparable to saying that if an is not zero, then b/a is an integer.

When a and b are both integers and b is a multiple of a, then an is said to be a divisor of b.

So, the multiples of 42 are:

42, 84, 126, 168, 210, 252, 294, 336, 378, 420

Therefore, the first 10 multiples of 42 are as follows:

42, 84, 126, 168, 210, 252, 294, 336, 378, 420.

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Correct question:

What are the first 10 multiples of 42?

Answer:

22/7 or 3.14

the value of pie is 22/7 or if you write it in decimals it will be 3.14.

The number where the digit 6 have a value that is 10 times as great as the digit 6 in the number 62,045 is A. 640,488.

It should be noted that a place value is the value that is represented based on the position of a number.

In this case, the digit of 6 in 62,045 is 60000. From the options, the digit of 6 in 640488 is 600000. This is 10 times the value.

Therefore, the number where the digit 6 have a value that is 10 times as great as the digit 6 in the number 62,045 is 640,488. The correct option is A.

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The derivative for [tex]y=eu(x)[/tex]; [tex]u(x)[/tex] is a function in terms of [tex]x[/tex] is [tex]\frac{dy}{dx}[/tex]=[tex]eu'(x)[/tex]+ [tex]u(x)e[/tex].

Definition of derivative-A derivative is the rate of change of a function with respect to a certain variable . Derivatives are fundamental to the solution of problems in calculus and differential equations.

There are certain rules of differentiation which help us to evaluate the derivatives of some particular functions. :

Power Rule.

Sum and Difference Rule.

Product Rule.

Quotient Rule.

Chain Rule.

Given: [tex]y=eu(x)[/tex]

Explanation:-This equation can be solved using the product rule of derivatives .

According to the product rule derivative of uv will be taken as -

                                            u(v)' + v(u)'

where (') represents derivative of the variable.

Therefore accordingly, [tex]y=eu(x)[/tex]

Differentiating with respect to [tex]x[/tex],

[tex]\frac{dy}{dx} =e(u(x))'+u(x)(e')[/tex]

[tex]\frac{dy}{dx} =eu'(x)+u(x)e[/tex]

So, finally the derivative of the function in terms of x is [tex]\frac{dy}{dx}[/tex] = [tex]eu'(x)+[/tex][tex]u(x)e[/tex]

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Answer: the range is 4

Step-by-step explanation:

Yes, 5 is a all real number.

A real number is a number that can take on any value on the real number line, which is an infinite line that extends from negative infinity to positive infinity. Real numbers are used in mathematics to represent quantities such as distance, area, and time. They can also be used to represent irrational numbers, such as pi, and numbers with recurring decimals, such as 1/3.

A real number is any number that is either a rational number (fractions and whole numbers) or an irrational number (numbers that cannot be expressed as a fraction or a whole number). This includes all integers, fractions, and decimals. 5 is an integer, so it is included as a real number.
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Answer:

the slope between the two points is 3.5.

Step-by-step explanation:

To find the slope between two points, you can use the formula: slope = (y2 - y1) / (x2 - x1). Plugging in the coordinates for the two points, we get: slope = (-3 - 18) / (-14 - (-8)). Simplifying the expression, we get: slope = -21 / -6Which simplifies to slope = 3.5, So slope between the two points is 3.5.

Answer:

Slope: 7/2

Step-by-step explanation:

Slope formula:

m=(y2-y1)/(x2-x1) ==> where m=slope, (x1, y1), (x2, y2)

(x1, y1), (x2, y2) ==> (x1=-8, y1=18), (x2=-14, y2=-3)

m=(-3-18)/(-14-(-8))  ==> plugin y2=-3, y1=18  and  x2=-14, x1=-8

m=(-(3+18))/(-14+8)  

m=(-21)/(-6)  ==> simplify

m=21/6  ==> m=7/2

Yes it is divisible by 3. A number is fully divisible by three if its digit sum is also divisible by three, according to the rule of divisibility for three.

The divisibility rule is a concise and practical approach to check, often by looking at the integer's digits, whether a given integer is divisible by a given set divisor without actually executing division. Without actually doing the division procedure, you may quickly discover if a given number can be divided by a defined divisor using the divisibility test. When dividing two numbers exactly, the quotient must be an integer and the remainder must be zero.

here  

add all the numbers,

1 + 2+ 3 + 4+ 5 = 15

and 15/3 = 5

so it is divisible by 3

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Answer: 5.66

Step-by-step explanation:

1.5(x-5)= 1

1.5x - 7.5 = 1

Add 7.5 on both sides

1.5x = 8.5

Divided 1.5 into both sides

x = 5.66

Answer:

A line.

Step-by-step explanation:

Graphing y =  -3  will give you a horizontal line 3 units below the x-axis.

To imagine this, we can create a bunch of points, each with a y coordinate of -3. For example: (-2, -3), (-1, -3), (3, -3), (6,-3). Graphing these will lead to a horizontal line!

The indicated critical value of z₀.₁₁ is 0.54.

What does it mean round to two decimal places?

The second place to the right of the decimal point, or the hundredths place, is used to round a decimal value to two decimal places. For instance, you can round 2.83620364 to two decimal places as 2.84 and 0.7035 to two decimal places as 0.70.

A crucial value is the test statistic's value that establishes a confidence interval's upper and lower boundaries or the level of statistical significance for a given test.

The critical value of z₀.₁₁ is z₀.₁ ₊ ₀.₀₁ = 0.5438

The round to two decimal places of 0.5438  is 0.54.

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The mode of the data at the call center will be 15 which are the non urgent s that was received.

The mode of a data set is defined as the value of the set of data that appeared or occurred the most. When two values have the same number of occurrences or frequency, it is said that the data set is bimodal or has two modes.

From the scenario given,

The number of calls received in a day = 20 calls.

The number of calls that are urgent = 5

The number of calls that are not urgent = 15

Therefore, the mode of this data set would be the number of non urgent calls which is 15.

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Answer:

36 different ones

Step-by-step explanation:

When two dice are rolled, there are now 36 different and unique ways the dice can come up. This figure is arrived at by multiplying the number of ways the first die can come up (six) by the number of ways the second die can come up (six)

The 95% confidence interval for the difference in the two means = (-2.56 , 0.16)

What is Confidence Interval?

The mean of your estimate plus and minus the range of that estimate constitutes a confidence interval. Within a specific level of confidence, this is the range of values you anticipate your estimate to fall within if you repeat the test. In statistics, confidence is another word for probability.

Given,

Sample statistics                         size(n)               mean(x)                s.d(s)

Construction site                           16                  x₁ = 5.584               1.812

Undistributed Location                 16                  x₂ = 6.789               1.945

Standard error = 0.665

Degree of freedom = 30

Critical T-value for 95% confidence interval is 2.0423

The 95% confidence interval for the difference in the two means

(construction site - undistributed location)

= x₁ -x₂ ± (t-value) (standard error)

= 5.584 - 6.786 ± (2.0423) (0.665)

= -1.2020 ± 1.358130

= (-1.2020 - 1.358130 , -1.2020 + 1.358130)

= (-2.56 , 0.156)

= (-2.56 , 0.16)

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Given,

Sample statistics                         size(n)               mean(x)                s.d(s)

Construction site                           16                  x₁ = 5.584               1.812

Undistributed Location                 16                  x₂ = 6.789               1.945

Standard error = 0.665

Degree of freedom = 30

Critical T-value for 95% confidence interval is 2.0423

The 95% confidence interval for the difference in the two means

(construction site - undistributed location)

= x₁ -x₂ ± (t-value) (standard error)

= 5.584 - 6.786 ± (2.0423) (0.665)

= -1.2020 ± 1.358130

= (-1.2020 - 1.358130 , -1.2020 + 1.358130)

= (-2.56 , 0.156)

= (-2.56 , 0.16)

Answer:

The roots are imaginary.

Step-by-step explanation:

⭐ What is "the nature of the roots"

⭐What are the different types of "the nature of the roots"?

⭐How do we determine "the nature of the roots"?

To solve this problem, substitute the values of the coefficients of the given quadratic equation into the quadratic formula:

[tex]x =\frac{ -6+/-\sqrt{6^2-4(2)(30)} }{2(2)}[/tex]

Now, compute only the discriminant ([tex]b^2-4ac[/tex]).

[tex]b^2-4ac = 36-4(60)[/tex]

[tex]b^2-4ac = 36-240[/tex]

[tex]b^2-4ac = -204[/tex]

[tex]b^2-4ac[/tex]< 0. Therefore, the roots are imaginary.

The linear equation 2x + 5y = 7 has  infinitely many solutions.

In this question we need to determine the number of solutions of the linear equation 2x + 5y = 7.

We know that an equation of the form ax + by + c = 0, where a, b and c are real numbers such that a ≠ 0 and b ≠ 0, is called as a linear equation in two variables.

Also as we know a linear equation in two variables has infinitely many solutions. The graph of linear equation in two variables is a straight line. Every point on the straight line represents a solution of the linear equation.

Here we have a linear equation in two variables 2x + 5y = 7.

By rearranging given linear equation we get,

5y = 2x - 7

y = (2x - 7)/5

Here we will get different values of y for different values of x

Therefore, the linear equation has infinitely many solutions.

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The total of their age be in three years time is 40 years.

As per the given data:

The total of the age of Ann, Bob and Chri is 31 years.

Let the present age of Ann is 'x' years.

Then the age of Ann after 3 years will be x+3

Let the present age of Bob is 'y' years.

Then the age of Bob after 3 years will be y+3

Let the present age of Chri is 'z' years.

Then the age of Chri after 3 years will be z+3.

The total of the age of Ann, Bob and Chri is 31 years.

x + y + z = 31.....(i)

The total of the age of Ann, Bob and Chri after 3 years is ( x + 3 + y + 3 + z + 3 ) years.

= ( x + 3 + y + 3 + z + 3 )

= ( x + y + z + 9 )

From equation (i)..... ( x + y + z = 31 )

= 31 + 9

= 40 years

Therefore the answer is 40 years.

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The graph of  k x = 5 will be a line parallel to Y axis and the graph of k x < 5 will be the region where the value of x does not exceed 5/k.

Linear Inequalities are the expressions which have a left and a right hand side connected with inequality signs like >, <, ≥ and ≤.

Consider k x = 5

⇒ x = 5/k

This means that, for a nonzero constant k, the value of x will be the same throughout, which is 5/k.

If k = 1, then the value of x will be 5 throughout.

If k = 2, then the value of x will be 5/2 = 2.5 throughout.

and so on.

So the graph of k x = 5 will be a line parallel to the Y axis passing through the point x = 5/k for some constant k.

Now let us consider k x < 5.

⇒  x < 5/k

This means that for any nonzero constant k, the value of x will not be equal or never exceed 5/k.

If k = 1, then the value of x will be less than 5 throughout.

If k = 2, then the value of x will be less than 5/2 = 2.5 throughout.

and so on.

So the graph of k x < 5 includes the region where value of x does not exceed 5/k.

Hence the graph of  k x = 5 and k x < 5 is a line parallel to Y axis and the region which does not exceed 5/k respectively.

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Positive is the leading coefficient. The parabola is hence downward. The maximum vertex form value will then be a negative four.

Let the point (h, k) be the vertex of the parabola and a be the leading coefficient.

Then the equation of the parabola will be given as,

y = a(x - h)² + k

The equation is given below.

y = − x² + 2x − 5

Convert the equation into a vertex form. Then we have

y = − x² + 2x − 5

y = − x² + 2x − 1 − 4

y = − (x² − 2x + 1) − 4

y = − (x − 1)² − 4

The leading coefficient is positive. So, the parabola is downward. Then the maximum value of vertex form will be negative 4.

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The complete question is given below.

How do you find the maximum of a quadratic function on a calculator?

y = − x² + 2x − 5?

Answer:

The Answer is 12 g because 12* g =12g

Algebra is advised for ninth grade, and pre-Algebra is taught in eighth grade, according to the Common Core standards that California enacted two years ago and is just now starting to apply.

In algebra, definite or fixed numbers with values like 2, 9, 0.068, etc. are used. Introduction to algebra, advanced algebra, abstract algebra, linear algebra, and commutative algebra are only a few of the many sub-disciplines of algebra.

here ,

The option to take it in the eighth grade may be given to students who demonstrated extraordinary potential in the subject.

Algebra is often taught in the eighth grade in many schools today, while certain students who meet a certain threshold can finish the subject in the lower grades.

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