A class tossed coins and recorded 165 heads and 172 tails. What is the experimental probability of tails?

Answer:

Annual mean salary at the company is $52,000

Step-by-step explanation:

Given :  If a company has 5 employees with annual salaries of $30,000, $50,000, $30,000, $80,000, and $70,000, respectively.

We have to determine the mean annual salary at the company.

Consider the given salaries of 5 employee of the company

$30,000, $50,000, $30,000, $80,000, and $70,000

The annual mean salary at the company is the sum of salary of the employees divided by the number of employees.

Annual mean salary =[tex]\dfrac{30,000+50,000+30,000+70,000+80,000}{5}=\frac{2,60,000}{5}[/tex]

Thus, Annual mean salary at the company is $52,000

The Inequality that has the graph shown below is [tex]y \ge -\frac{1}{4}x + 1.[/tex] correct choice is [tex]y \ge -\frac{1}{4}x + 1.[/tex]

This can be seen by noting that the line is solid and shaded above the line, which indicates that all points above the line satisfy the inequality.

Graphs are often used to visually represent inequalities in mathematics. Inequalities compare the relative sizes of two expressions, and their graphs help illustrate the solutions to these inequalities on a number line or in a coordinate plane

The other inequalities in the image are not correct because:

[tex]y > -\frac{1}{4}x + 1[/tex]would have the line shaded below the line.

[tex]y < = -\frac{1}{4}x + 1[/tex] would have the line dashed, not solid.

[tex]y < -\frac{1}{4}x + 1[/tex]would have no points above the line satisfying the inequality.

Therefore, the correct inequality is [tex]y \ge -\frac{1}{4}x + 1.[/tex]

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The height of the building is approximately 40.39 feet.

To find the height of the building, we can use the concept of similar triangles. The height of the building is proportional to the length of its shadow. We can set up a proportion using the angle of elevation of the sun and the length of the shadow.

Let x be the height of the building. The proportion can be set up as:

(x / 73) = tan(29°)

Using a calculator, we can find the value of tan(29°) to be approximately 0.5543. Solving for x, we get:

x = (73 * 0.5543)

Therefore, the height of the building is approximately 40.39 feet.

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The probability of drawing a red card first followed by a blue card from a hat with five different colored cards without replacement is 0.05 or 5%.

The question asks for the probability of drawing a red card first and a blue card second from a hat containing five different colored cards without replacement. To calculate this, we use the formula for conditional probability and the multiplication rule for independent events. Since the cards are drawn without replacement, the events are dependent.

The probability of drawing the red card first is 1/5, since there is one red card out of five. After drawing the red card, there are four cards left. The probability of drawing the blue card second is thus 1/4, as there is only one blue card left among the four remaining cards. The probability of both events occurring in sequence is the product of the probabilities of each event:

P(Red first and Blue second) = P(Red first) × P(Blue second | Red first) = (1/5) × (1/4) = 1/20 or 0.05.

Therefore, the probability that the first card is red and the second card is blue is 0.05 or 5%.

Answer:

What is the vertex of the parabola?

Round to the nearest hundredth.

✔ (8.33, 236.67)

Step-by-step explanation:

Answer:

  B.  4

Step-by-step explanation:

Vertical and horizontal lines through the vertices farthest from center are two of the lines of symmetry.

The other two lines of symmetry are the diagonal lines through the vertices closest to center.

There are a total of 4 lines of symmetry.

Answer:

4

Step-by-step explanation:

hope it helps

The first battery voltage is 12.

The second battery voltage is 6.

The third battery voltage is 36.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

First battery voltage = M

Second battery voltage = N

Third battery voltage = O

Now,

We can make an expression as,

M + N + 0 = 54 _____(A)

And,

M = 2N  ____(1)

M = (1/3)O ____(2)

Now,

From (1) and (2)

N = M/2

O= 3M

Substituting in (A)

M + N + O = 54

M + M/2 + 3M = 54

4M + M/2 = 54

8M + M = 108

9M = 108

M = 12

Now,

N = M/2 = 12/2 = 6

O= 3M = 3 x 12 = 36

Thus,

First battery voltage = 12

Second battery voltage = 6

Third battery voltage = 36

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The expression that shows each factor rounded to the nearest whole number is 32.

Rounding some number to a specific value is making its value simpler (therefore losing accuracy), mostly done for better readability or accessibility.

Rounding to some place keeps it accurate on the left side of that place but rounded off like trimmed from the right in terms of exact digits.

Given that Ella wants to estimate the product (3.6)(7.8).

3.6 rounded to give 4

7.8 rounded to give 8

Therefore, the product would be;

4 x 8 = 32

Hence, the expression that shows each factor rounded to the nearest whole number is 32.

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Final answer:

To estimate the product of 3.6 and 7.8 by rounding to the nearest whole number, round 3.6 down to 3 and 7.8 up to 8, making the estimated expression (3)(8).

Explanation:

The student has asked how to estimate the product of 3.6 and 7.8 by rounding each factor to the nearest whole number.

To do this, we look at each factor and determine which whole number it is closest to. For 3.6, we round down to 3 because it is closer to 3 than to 4. For 7.8, we round up to 8 because it is closer to 8 than to 7. Hence, the expression that represents the product of each factor rounded to the nearest whole number is (3)(8).

Answer:

$2,900

Step-by-step explanation:

The additional 180 - 160 = 20 bicycles cost an additional $11,000 - 10,100 = $900. That means the 180 bicycles cost 9·$900 = $8100, and the fixed costs are $11,000 - 8,100 = $2,900.

_____

Each group of 20 bikes costs $900, so 9 groups of 20 (180 bikes) cost 9×$900 = $8100.

To find the daily fixed costs of RideEm Bicycles factory, subtract the variable cost from the total cost.

To find the daily fixed costs of RideEm Bicycles factory, we need to determine the fixed cost component of the total cost. We can do this by subtracting the variable cost from the total cost. The formula for calculating fixed cost is:

Fixed Cost = Total Cost - (Variable Cost per Unit x Number of Units)

Using the given information:

By plugging in the values and solving the equations, we can find the daily fixed costs of the company.

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The range of the given function, f(x) = x^2 - 4x + 1, is {y: y ≥ -3}. This is determined by completing the square to find the vertex form of the parabola, which indicates that the minimum y-value is -3 (the y-coordinate of the vertex) and the function values extend to infinity.

The question asks us to find the range of the function f(x) = x^2 - 4x + 1. In mathematics, the range of a function is the set of output values (the y-values) that the function produces when we substitute the domain (the x-values) into the function.

To determine the range of a quadratic function like this, we could complete the square for the function and adjust it to the vertex form of a parabola, which is f(x) = a(x - h)^2 + k, where k is the minimum or maximum y-value of the parabola.

For the function f(x) = x^2 - 4x + 1, the completed square form is f(x) = (x - 2)^2 - 3. So, the vertex of the parabola is (2, -3), and since the coefficient of (x - 2)^2 is positive, the parabola opens upwards. This means that the minimum y-value is -3 and the maximum y-value is infinity. So the range of the function is {y: y ≥ -3}.

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Answer:

d is the answer

The equation that represents the translated function for

[tex]\rm f(x) = \dfrac{1}{5}[/tex]   [tex]\rm is\;\; \rm \bold{g(x) = f(x) +4 = 4.2}[/tex].

Given that the function f(x) = 1/5 is translated up 4 units.  

We have to determine the equation that  represents the translated function

The function f(x) = 1/5  as the function is translated.    

Translation is a concept of mathematics . In translation the shape of the object is simply moved linearly from one point to other point by adding some constant values in the previous coordinates. In translation , there  is no dilation shape and size of the object remains the same.

Let us consider that if the function is translated up with 4 units then the new function is [tex]\rm\bold{ g(x)}[/tex]

So according to the language of question we

[tex]\rm g(x) = f(x) +4[/tex]

[tex]\rm g(x) = \dfrac{1}{5} +4 = \dfrac{21}{5} = 4.5[/tex]

[tex]\rm g(x) = 4.5[/tex]

The equation that represents the translated function for

[tex]\rm f(x) = \dfrac{1}{5}[/tex]      [tex]\rm is\;\; g(x) = f(x) +4 = 4.2[/tex]

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Answer:

The statement is true.

Step-by-step explanation:

Given : Reflecting the graph of y = sin x across the y-axis is the same as reflecting it across the x-axis.

To find : Is this statement true or false?

Solution:

Rules of reflection :

Along across y-axis if we have a point [tex](x,y)\rightarrow(-x,y)[/tex]

So, y=sinx

The reflection across y-axis→ [tex]y=sin(-x) \Rightarrow y = -sinx[/tex].......[1]

Along across x-axis if we have a point [tex](x,y)\rightarrow(x,-y)[/tex]

so, y=sinx

The reflection across x-axis → [tex]-y=sinx\Rightarrow y= -sinx[/tex] .....[2]

Hence, [1] and [2] both of them are equal

Therefore, the statement is true.

[tex]3x^3y ( 6xy + 7x^2 - 2y )[/tex] is the factored form of [tex]18x^4y^2+21x^5y-6x^3y^2[/tex] .

Given, expression [tex]18x^4y^2+21x^5y-6x^3y^2[/tex] .

To factorize the expression take the common terms present in each part of an expression.

Expression : [tex]18x^4y^2+21x^5y-6x^3y^2[/tex]

Highest power of x which is present in each part = x³

Highest power of y which is present in each part = y

HCF of 18, 21 , 6 = 3

Factorizing the expression:

Take 3x³y as common,

Factored form : [tex]3x^3y ( 6xy + 7x^2 - 2y )[/tex] .

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The present value that will grow to $7,000 if the annual interest rate is 3.5% compounded quarterly for 9 years is $5,187.72

The Breakdown

To find the present value (PV) that will grow to $7,000 if the annual interest rate is 3.5% compounded quarterly for 9 years, you can use the formula for compound interest:

PV = FV / (1 + (r / n))^(n*t

Where:

PV = Present Value

FV = Future Value ($7,000 in this case)

r = Annual interest rate (as a decimal, so 3.5% is 0.035)

n = Number of times the interest is compounded per year (quarterly, so 4 times)

t = Number of years (9 years in this case)

PV = 7000 / (1 + (0.035 / 4))^(4 * 9)

PV = 7000 / (1 + 0.00875)^(36)

PV = 7000 / (1.00875)^36

Now, calculate (1.00875)^36:

(1.00875)^36 ≈ 1.34985880768

Now, divide $7,000 by this value to find the present value:

PV ≈ 7000 / 1.34985880768 ≈ $5,187.72

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x = -2

The line represents the output value (y) for a given input value (x). Where the lines cross, the output values are equal. These lines cross at x=-2.

Answer:x=-2

Step-by-step explanation:

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The motion of the projectile (cannonball), given by the (quadratic)

polynomial function is the path of a parabola.

Response:

1. f(x) is the output of the projectile function, where;

x = The input which is the distance

Therefore;

2. The zeros are the points where the height, f(x) = 0

Therefore;

3. The net should be placed where the cannonball is expected to reach ground level.

Therefore;

4. The given polynomial can be equated to 0 as follows;

x² - 26·x - 120 = 0

5. x² - 26·x - 120 = x² - 30·x + 4·x- 120

Which gives;

x·(x - 30) + 4·(x- 30) = (x - 30)·(x + 4)

6. Where; (x + p)·(x + q) = a·x² + b·x + c

We have;

The values of p and q that give the correct factors are;

7. The polynomial, -0.05·(x² - 26·x - 120) = 0 in factored form is therefore;

8. From the factors, we have;

-0.05·(x² - 26·x - 120) = -0.05·(x - 30)·(x + 4)

The roots of the equations, are given as follows;

x - 30 = 0 and x + 4 = 0

Which gives;

9. The roots of the equation are therefore;

10. The zeros for the function, are the values of x at which f(x) = 0

At x = 30 f(30) = -0.05 × (30² - 26 × 30 - 120) = 0

At x = -4, f(-4) =  -0.05 × ((-4)² - 26 × (-4) - 120) = 0

11. Yes. The zeros are the same as the roots found given that at the roots, f(x) = 0

12. The zeros of the function are x = 30 and x = -4, which are points at

which the projectile (cannonball) is at ground level. The negative zero, x

= -4, means that, apart from the point x = 30, the projectile can (also/only)

be at ground level at a point before the location where the projectile is

launched, (-4) which means that at the point at which the cannonball is

launched, which is at x = 0, the cannonball was not on the ground, but

at the lip of the barrel or at a more elevated position.

What the negative zero means are therefore;

13. At 30 feet, x = 30, which is a zero of the function, and the cannonball

is at ground level, such that a net placed at 30 feet from the cannon

will be hit by the cannonball.

Therefore;

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