can someone help me to find a website that gives many exercises in math and science?

Answer:

w = r1r2t is the correct answer which would be the letter C. This is the one that is not algebraically correct.

Step-by-step explanation:

When solving this equation for t the step w= r₁r₂t would not be algebraically correct.

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

The following are the basic principles and steps to summarize any linear algebra statement:

Erase all packaging symbols, such as parenthesis and parenthesis, by dividing factors.

Using the exponent rule, grouping can be rule out if the words contain decimals.

To merge words, omit or add similar pictures.

It is given that,

The work accomplished by two people working on the same task for the same amount of time but at different rates is given by the equation,

w=r₁t+r₂t

Taking t common,

w=(r₁+r₂)t

Rearrange the equation as

t=w / (r₁+r₂)

Thus, when solving this equation for t the step w= r₁r₂t would not be algebraically correct.

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Answer:

g(x)=(x+3)2 we must find x? so x+3=0 x=-3 we transformation -3 on left

Step-by-step explanation:

can u answer my queston pleas on my acc

The transformations applied to f(x)=x² to form g(x)=3(x+2)² −1 are: Horizontal shift left by 2 units.

Vertical stretch by a factor of 3.

Vertical shift down by 1 unit.

To transform the graph of  f(x)=x² into g(x)=3(x+2)² −1, we can identify a series of transformations that have been applied to the original function.

The term (x+2)² inside the function g(x) indicates a horizontal shift to the left by 2 units compared to f(x).

This is a shift in the negative direction on the x-axis.

The coefficient 3 in front of (x+2)² indicates that the graph is vertically stretched by a factor of 3 compared to the graph of f(x).

The term −1 subtracted at the end of the function g(x) indicates a vertical shift downward by 1 unit compared to f(x).

This is a shift in the negative direction on the y-axis.

Hence, the transformations applied to f(x)=x² to obtain g(x)=3(x+2)² −1 are horizontal shift to the left by 2 units, vertical stretch by a factor of 3 and vertical shift downward by 1 unit.

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The expression in terms of I, E, and Y will be E / (I - Y).

Given that:

Equation, I = E/X + Y

The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.

Simplify the equation for X, then we have

I = E/X + Y

I - Y = E/X

X = E / (I - Y)

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Hicksian demand functions are:x1** = 2P₁x₂ ; x₂** = P₂²

Utility function: u(x1+x2) = .5ln(x1) + .25ln(x₂) .The Marshallian demand functions are: x1* = - and x₂* = P₂.

The indirect utility function is found by substituting Marshallian demand functions into the utility function and solving for v(P₁, P₂, Y).u(x1*,x2*) = v(P₁,P₂,Y) ⇒ u(-, P₂) = v(P₁,P₂,Y) ⇒ .5ln(-) + .25ln(P₂) = v(P₁,P₂,Y) ⇒ v(P₁,P₂,Y) = - ∞ (as ln(-) is not defined)

Thus the indirect utility function is undefined.

Minimum expenditure function can be derived from the Marshallian demand function and prices of goods:

Exp = P₁x1* + P₂x2* = P₁(-) + P₂P₂ = -P₁ + P₂²

Minimum expenditure function is thus:

Exp = P₁(-) + P₂²

Hicksian demand functions can be derived from the utility function and prices of goods:

H1(x1, P1, P2, U) = x1*H2(x2, P1, P2, U) = x2*

Hicksian demand functions are:

x1** = 2P₁x₂

x₂** = P₂²

If there are no restrictions on the amount of money the consumer can spend, the Hicksian demand functions for x1 and x2 coincide with Marshallian demand functions.

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The correct statement is Most of the songs were between 3 minutes and 3.8 minutes long.

Based on the given information from the graph, we can determine the following:

The graph shows an upward trend from 2.8 to 3.4 on the horizontal axis.

Then, there is a downward trend from 3.4 to 4 on the horizontal axis.

From this, we can conclude that most of the songs played during the one-hour interval were between 3 minutes and 3.8 minutes long. This is because the upward trend indicates an increase in length from 2.8 to 3.4, and the subsequent downward trend suggests a decrease in length from 3.4 to 4.

Therefore, the correct statement is:

Most of the songs were between 3 minutes and 3.8 minutes long.

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Answer:

A

Step-by-step explanation:

Answer:

15.

Step-by-step explanation:

Hope this helps!

Answer:

15

Step-by-step explanation:

3 + 6 × 2 =

- Following the rules of bedmas, multiply the terms first.

3 + 12

- Now, add the remaining values.

= 15

The upper bound of the 95% confidence interval for the average age in the U.S. is 48.29 years.

To determine the upper bound of the 95% confidence interval for the average age in the U.S., we can use the sample data from the survey. The sample size is 1072 people, randomly selected from the U.S. population, with a minimum age of 12. By calculating the average age of the respondents, we can estimate the average age of the entire U.S. population.

Using the given information that the average age of the respondents is 43.56 years, and assuming that the sample is representative of the population, we can calculate the standard error. The standard error measures the variability of the sample mean and indicates how much the sample mean might deviate from the population mean.

Using statistical methods, we can calculate the standard error and construct a confidence interval around the sample mean. The upper bound of the 95% confidence interval represents the highest plausible value for the population average age based on the sample data.

Therefore, based on the provided information and calculations, the upper bound of the 95% confidence interval for the average age in the U.S. is 48.29 years.

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2400 laps were covered in 15 weeks.

The unitary technique involves first determining the value of a single unit, followed by the value of the necessary number of units.

For example, Let's say Ram spends 36 Rs. for a dozen (12) bananas.

12 bananas will set you back 36 Rs. 1 banana costs 36 x 12 = 3 Rupees.

As a result, one banana costs three rupees. Let's say we need to calculate the price of 15 bananas.

This may be done as follows: 15 bananas cost 3 rupees each; 15 units cost 45 rupees.

Given:

Number of laps each week swimmed = 160 laps

Now, in weeks the number of laps covered

= 160 x 15

= 2400 laps

Hence, 2400 laps were covered in 15 weeks.

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All the correct values that make the given inequality true are,

⇒ d = - 24, - 23, - 21, - 19, - 14

A relation by which we can compare two or more mathematical expression is called an inequality.

We have to given that;

The inequality is,

⇒ 3d ≥ - 72

Now, We can solve as;

⇒ 3d ≥ - 72

Divide by 3 both side,

⇒ d ≥ - 72/3

⇒ d ≥ - 24

Thus, All the correct values that make the given inequality true are,

⇒ d = - 24, - 23, - 21, - 19, - 14

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The correct statements about the two-way frequency table are:

Option C, and Option E.

According to the statement

we have to check that the given statement is applicable or not on the given conditions.

So, For this purpose

The two-way frequency table is

In Mathematics and statistics, A two-way frequency table is a tabular method for displaying relative data for two categories of variables. (See the attached).

the given options are:

Option A the row categories are "wears glasses"

Option B and "do not wear glasses."

Option C two teachers do not wear glasses.

Option D thirty-six students wear glasses.

Option E a total of 6 teachers were polled.

So, The correct statements about the two-way frequency table are:

Option C, and Option E.

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Answer: the corret answer is A, C and E

Answer:

14.3 gallons

Step-by-step explanation:

18 1/6 gallons - 3 7/8 = 14.29

18 - 3 = 15

1/6 - 7/8 = 15 - 0.70833333333 = 14.2916666667

You need to be careful here if you use basic subtraction, simply as two minus would change to addition.

There are 230230 possible groups.

Each of the different groups or selections can be formed by taking some or all of a number of objects, irrespective of their arrangments is called a combination.

Given that Total employees = 26

The Number of employees want to choose = 6

Tthe combination of m things taken k at a time is given by the following formula:

\(^mC_k = \dfrac{m!}{k! \times (m-k)!}\)

Putting m = 26 and k= 6, we obtain;

C = 230230

Therefore, we can conclude that there are 230230 possible groups.

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Answer: y = 2x

Step-by-step explanation:

       We will change this equation into slope-intercept form (y = mx + b). To do this, we will isolate the y-variable.

Given:

     y - 4 = 2(x - 2)

Distribute:

     y - 4 = 2x - 4

Add 4 to both sides of the equation:

     y = 2x

Given :

Carl earns $3.24 per hour walking his neighbour's dogs.

He walks them 1/4 of an hour in the morning and 1/2 of an hour in the afternoon.

To Find :

How much money does Carl earn each day.

Solution :

Total time of walk per hour, T = 1/4 + 1/2 = 3/4 hours.

Money for 1 hour is $3.24 .

So, money for 3/4 hour :

\(3.24\times \dfrac{3}{4}=\$2.43\)

Therefore, money does Carl earn each day is $2.43 .

Hence, this is the required solution.

Answer:

let x = amount of money saved up

x/2 + 50 = 125

Step-by-step explanation:

The true options of perpendicular bisector of line AB are:

A perpendicular bisector is a straight line or line segment cutting into two equally-sized portions at an exact 90-degree angle, intersecting the middle of the targeted line.

It's essentially a line which passes through the center of the line segment, perpendicularly crossing it to make two symmetric parts.

To explain further, the perpendicular bisector of any specified line segment is an imaginary line that extends right through the midpoint and adheres to a perfect perpendicular orientation with said line.

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A perpendicular bisector meets line AB at 90°, is a fixed distance from it, and passes through its midpoint. It does not necessarily pass through points A and B unless they are the midpoint.

The perpendicular bisector of a line segment AB has several properties. Firstly, it meets line AB at 90°. This is because 'perpendicular' means 'at a right angle to.' Secondly, it is a fixed distance from line AB along its entire length. This is the definition of the bisector; it splits the line segment into two equal parts. Thirdly, it passes through the midpoint of line AB. By definition, a bisector intersects the line segment at its midpoint. However, it does not necessarily pass through the points A or B unless they happen to be the midpoint of line segment AB. The statement that 'it meets line AB at 180°' and 'it does not meet line AB' are incorrect, because a perpendicular bisector must meet the line segment it bisects, and when it does so, it must be at a 90-degree angle.

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Answer:

x = 11

z = 86

Step-by-step explanation:

8x + 6 and 10x-16 are vertical angles

Vertical angles are pairs of angles that are opposite each other and have the same vertex, or point of intersection. They are formed when two lines intersect at a point, and are always congruent, or of equal measure.

To solve this equation, we need to isolate the variable x on one side of the equation. To do this, we can start by subtracting 6 from both sides of the equation:

8x + 6 - 6 = 10x - 16 - 6

8x = 10x - 22

Now we can subtract 8x from both sides of the equation:

8x - 8x = 10x - 22 - 8x

0 = 2x - 22

To solve for x, we can add 22 to both sides of the equation:

0 + 22 = 2x - 22 + 22

22 = 2x

Finally, we can divide both sides of the equation by 2 to find the value of x: 22 / 2 = 2x / 2

x = 11

Therefore, the solution to the equation is x = 11.

Now that we have x, z is a supplementary angle to 8x + 6 (or you could do 10x - 16)

Supplementary angles are pairs of angles that add up to 180 degrees. They are formed when two lines intersect at a point, and the angles formed at the intersection are supplementary.

First plug in x, 8x + 6 = 8(11) + 6 = 88 + 6 = 94

180 - 94 = z

z = 86

Answer:

4

Step-by-step explanation:

996

888

978

798

When b is 3, the value of the expression \(2b^3 + 5\) is 59.

To evaluate the expression\(2b^3 + 5\) when b is 3, we substitute the value of b into the expression and perform the necessary calculations.

Given that b = 3, we substitute this value into the expression:

\(2(3)^3 + 5\)

First, we evaluate the exponent, which is 3 raised to the power of 3:

2(27) + 5

Next, we perform the multiplication:

54 + 5

Finally, we add the two terms:

59

Therefore, when b is 3, the value of the expression \(2b^3 + 5\) is 59.

In summary, by substituting b = 3 into the expression \(2b^3 + 5\), we find that the value of the expression is 59.

It's important to note that the provided equation has multiple possible solutions for x, but when b is specifically given as 3, the value of x is approximately 3.78.

It's important to note that in this equation, we substituted the value of b and solved for x, resulting in a specific value for x. However, if we wanted to solve for b given a specific value of x, we would follow the same steps but rearrange the equation accordingly.

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The statement that is consistent conceptually with what a computed Pearson's r value represents is:

"The Pearson's r value represents the degree to which X and Y scores covary together relative to how much X and Y scores vary separately."

Pearson's correlation coefficient (r) measures the strength and direction of the linear relationship between two variables, X and Y. It quantifies how closely the data points of X and Y align on a straight line. The magnitude of the correlation coefficient represents the degree to which the variables covary together. Additionally, the statement acknowledges that the coefficient compares the variability in X and Y scores separately to the variability when considering both variables together.

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We can use Coulomb's law to calculate the magnitude of the electric field at a distance r away from a point charge Q:

E = k * Q / r^2

where k is Coulomb's constant, Q is the charge of the point charge, and r is the distance from the point charge.

In this problem, we have a point charge Q of -10 nC located at (1.2 cm, 0 cm), and we want to find the x-component of the electric field at a distance r = 5.3 cm away at position (-4.1 cm, 0 cm).

To find the x-component of the electric field, we need to use the cosine of the angle between the electric field vector and the x-axis, which is cos(180°) = -1.

So, the x-component of the electric field at position (-4.1 cm, 0 cm) is:

E_x = - E * cos(180°) = - (k * Q / r^2) * (-1)

where k = 9 x 10^9 N*m^2/C^2 is Coulomb's constant.

Substituting the given values, we get:

E_x = - (9 x 10^9 N*m^2/C^2) * (-10 x 10^-9 C) / (0.053 m)^2

E_x ≈ -30,566.04 N/C

Rounding this to two significant figures and including the appropriate units, we get:

The x-component of the electric field is about -3.1 x 10^4 N/C (to the left).

Raheem's monthly payment given that he paid no additional fees is $78.75

Monthly payment refers to the amount of money paid by a person every month over a period of time.

Amount remaining after down payment = Total cost of HDTV - Down payment

= $880.00 - $250.00

= $630.00

Amount to pay each month = Amount remaining after down payment / Number of months to make equal payment

= $630.00 / 8

= $78.75

In conclusion, the amount Raheem will pay monthly for a period of 8 months if he paid no additional fees is $78.75

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Answer:

Slope: 7

Step-by-step explanation:

y=mx+b

substitute what you know

7=m

The equation which can be used to determine x, the number of players the team can bring to the tournament, would be 2089.50 - 1087.50 = 41.75x.

This equation represents the total amount of money raised minus the cost of the bus equaling the cost of meals per player multiplied by x, the number of players.

To solve for the variable x, we would first subtract 1087.50 from 2089.50 to get 1002. Then, we would divide 1002 by 41.75 to get the number of players the team can bring to the tournament. The equation would look like this:

2089.50 - 1087.50 = 41.75x

1002 = 41.75x

x = 24

Therefore, the team can bring 24 players to the tournament.

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Answer:$1640

Step-by-step explanation:82 x 20=$1640

Answer:

E is (1, 2) and M is (-3,-2),

Step-by-step explanation:

G and O are diagonally opposite points.

E is the image of O in the x axis and M is the image of G in the x axis.

E which is adjacent to M and  will have y-coordinate of 2 and x -coordinate 1.

M  will have x coordinate same as G which is -3 and y coordinate is -2.

The coordinates of E are (1, 2) and coordinates of M are (-3,-2),

The coordinates of a point are referred as (x, y), where x represents the position of the point with reference to the x-axis, and y represents the position of the point with reference to the y-axis.

Here, G and O are diagonally opposite points.

E is the image of O in the x-axis and M is the image of G in the x axis.

E which is adjacent to M and  will have y-coordinate of 2 and x -coordinate 1.

M  will have x coordinate same as G which is -3 and y coordinate is -2.

Thus, the coordinates of E are (1, 2) and coordinates of M are (-3,-2),

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