A ball is thrown from the top of a building with an initial velocity of 10 m/s and a height of 100 m. The ball makes an angle of 30 degrees with the horizontal and reaches a maximum height of 80 m. Calculate the potential energy of the ball at its highest point.

The equivalent expression is (t - 2)² - 1

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

4t²-16t+12

Divide through the equation by 4

So, we have the following representation

t² - 4t + 3

Take the coefficient of t

k = -4

Divide by 2

k/2 = -2

Square it

(k/2)^2 = 4

So, we have

t² - 4t + 3 + 4 - 4

Rewrite as

t² - 4t + 4  + 3 - 4

Express as squares

(t - 2)² - 1

Hence, the expression is (t - 2)² - 1

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Answer:

Step-by-step explanation:

No, the number of students at Lake View Middle School is not proportional to the number of teachers.

Proportionality between two quantities means that they maintain a constant ratio, regardless of their actual values. In this case, if the number of students and teachers were proportional, we would expect the ratio of students to teachers to remain constant as the total number of students or teachers changes.

However, in this scenario, the ratio of students to teachers is not constant. The ratio is 48:2, which simplifies to 24:1. This means that there are 24 students for every 1 teacher. If the number of students at the school were to double to 96, we would expect the number of teachers to double as well if they were proportional. However, this would mean that there would be 4 teachers assigned to the students, which is twice the original number of teachers assigned to the original number of students.

Therefore, the number of students at Lake View Middle School is not proportional to the number of teachers, because the ratio of students to teachers is not constant, and it changes as the total number of students or teachers changes.

Answer:

The function displayed in the table is best described as an Exponential Decay Function.

Step-by-step explanation:

            First, the main difference between a linear and an exponential function is the shape of its graph, as well as the presence of either a constant ratio or a constant rate of change.

            Linear functions are functions with a base function of  [tex]f(x)=mx+b[/tex], which has a constant rate of change ([tex]m[/tex]), and the shape of its graph will be a straight line.

            Exponential functions on the other hand use the base function [tex]f(x)=a^x[/tex], where [tex]a[/tex] is the constant ratio of the function, and its graph is curved and has a horizontal asymptote that the graph will approach but never touch as it either increases or decreases to positive or negative infinity respectively.

            The function in the problem gives you four points that are on its graph: (-2, 540), (-1, 270), (0, 135), and (1, 67.5). Using these points, you can determine whether it is a linear or exponential function. You can tell that when the x-value increases by 1, the f(x) value is divided by 2, or multiplied by [tex]\frac{1}{2}[/tex]. Since there is a constant ratio instead of a constant rate of change in the function, you would know that the function in the table is an exponential function. Since the function is also constantly decreasing, the function would be best described as an Exponential Decay Function.

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

Answer:

This question is asking for a construction problem, which involves using a pair of compasses and a ruler to draw the triangle DEF and then measure certain aspects of the triangle, such as the length of DF, the height of XF, and the locus of a point 2cm from E. It also requires bisecting the angle D.

Step-by-step explanation:

a. To construct the triangle DEF, use the compasses to draw arcs with radii of 3cm and 7cm from points D and E respectively, so that the arcs intersect. Then, connect the points of intersection with a straight line to form the side DE. Next, use the compasses to draw an arc with a radius of 8cm from point F and intersect it with the previous arcs. Connect the points of intersection with a straight line to form the side DF. Finally, use the ruler to connect the points D, E, and F to form the triangle. To draw the perpendicular line at X, draw a line segment parallel to DE passing through the midpoint X, and then use the compasses to draw arcs centered at X and intersecting the sides DE and DF. Connect the points of intersection to form the perpendicular line at X.

b. Measure the length of DF using a ruler.

c. Measure the height of the triangle XF by measuring the distance from X to DF.

d. The locus of the point that is 2cm from E can be found by drawing an arc with a radius of 2cm centered at E and intersecting the sides DE and DF. The points of intersection represent the points that are 2cm from E.

e. To bisect the angle D, use the compasses to draw two arcs centered at D that intersect the sides DE and DF. Connect the points of intersection to form the bisector of angle D.

It is important to note that these steps are only a general guide and may need to be adjusted slightly depending on the specifics of the problem.

The y-coordinate for the solution to the system of equations is -3.

What is a system of equations?

A finite set of equations for which common solutions are sought is referred to in mathematics as a set of simultaneous equations, often known as a system of equations. The intersection of two lines represents the system of equations' solution.

Given system of equations are,

6x + 11y = -3

4x + y = 17

To solve these equations, we must first remove x or y terms.

To do this we must make the removing term's coefficients the same.

In this case, let's remove y.

We are multiplying the second equation by 11. Then,

6x + 11y = -3

44x + 11y = 187

Now we will subtract the second equation from the first.

- 38x  = -190

x = 5

Now to find y, substitute x in any one of the equations.

6 * 5 + 11y = -3

11y = -33

y = -3

Hence the y-coordinate for the solution to the system of equations is -3.

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There are 105 odd numbers with a middle digit of 5 between 40000 and 69999 with no repeating digits.

We must first take into account the limitations of the issue in order to determine this.

∴,

There are three options for the first digit: 4, 5, and 6.

There are five options for the units digit: 1, 3, 5, 7, and 9.

There are seven possible outcomes for the remaining digits: 0, 2, 4, 6, 7, 8, and 9.

According to the multiplication principle, the total number of numbers having the needed qualities is:

3 × 5 × 7 = 105

Thus, there are 105 odd numbers between 40000 and 69999 that have a middle digit of 5 but no repeated digits.

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The best description is skew right. (the date is missing in this question)

A distribution is right skewed if it has a “tail” on the right side of the distribution.

here, we have,

The cumulative relative frequency graph shows that

The slope between 0 and 4 is substantially steeper than the curve between 6 and 14.

Then

Because most of the data values are between 0 and 4 (where the histogram's highest bar appears) and relatively few values lie between 6  and 14 the histogram's distribution should be skewed to the right, resulting in low bars tailing to the right side of the highest bars.

Because there are more data values between 0 and  4 than between 6 and 14 we can conclude that skewed right is the best description of the histogram's form. Hence, the it is skewed right.

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Answer:

[tex]3=e[/tex]

Step-by-step explanation:

I know this might be late but I can help if you still need it

So in the equation [tex]2=e-1[/tex], we need [tex]e[/tex] by itself. To do that we need to add [tex]1[/tex] to each side. We do this because the side that [tex]e[/tex] is on, the [tex]1[/tex] is being subtracted and we need to do the opposite of subtraction which is addition.

[tex]2=e-1[/tex]

[tex]+1[/tex]     [tex]+1[/tex]

So the new equation:

[tex]3=e[/tex]

Hope this helped!
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The equation 3y + 7 = x does not represent a direct proportion.

The constant of proportionality is a value that describes the relationship between two variables in a proportional relationship. For example, if y is proportional to x, and y = 2 when x = 4, then the constant of proportionality would be 0.5 (since 2/4 = 0.5). The constant of proportionality is often represented by the letter "k".

A direct proportion is a relationship between two variables where their ratio is always constant.

In the equation, 3y + 7 = x, the relationship between x and y is not fixed, so it does not represent a direct proportion.

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Answer: that is shading 10/12 of the figure

Step-by-step explanation:

Shading 5/6 of the figure means that 5 out of the 12 equal pieces would be colored or filled in. To visualize this, imagine the figure being divided into 12 equal slices, like a pizza. If 5 of those slices were to be filled in with color, they would represent 5/6 of the total figure.

Answer: maybe go to quizly

Step-by-step explanation: just type geometric formulas quizly in the search bar

answer you can go to kahn acadamy

Step-by-step explanation:

please add me on brainlist

It should be noted that it is possible to construct a matrix with linearly independent columns. This means that no one column can be represented as a linear combination of the other columns. In this case, the columns are said to span the space of the matrix.

It is also possible to construct a matrix with linearly independent rows. This means that no one row can be represented as a linear combination of the other rows.

In this case, the rows are said to span the space of the matrix. In general, the rows and columns of a matrix may or may not be linearly independent, depending on the specific matrix and the basis used to represent it.

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Answer:

Below

Step-by-step explanation:

Slope of BLACK line = rise/run =   9  / 3 = m =  3  

  y intercept = b = 2       Line eq =  y = mx+ b    y = 3x +2

Slope of BLUE line   similarly is  9 / -3  = m = -3

   and b = 8

     y = mx + b      y = -3x + 8

Answer:

The first table(top row, leftmost) represents a function

Step-by-step explanation:

In a function y = f(x), the value for y must be unique for a value of x

In other words, you cannot have two different values of y for the same x

We see that only the first table(top row, leftmost) satisfies this requirement

So that is the answer

Second table has two values for x = -5

Third table has two values of x = -2

Fourth table has two  values for x = -4

The rate of change between 2015 and 2016 was 1.

Let the thing that is changing be y and the thing with which the rate is being compared is x, then we have the average rate of change of y as x changes as:

[tex]\text{Average rate} = \dfrac{y_2 - y_1}{x_2 - x_1}[/tex]

We have been given the data

Year║Winning time (minutes)

2015║55

2016║54

2017║50

2018║51

2019║56

The rate of change = 2016 - 2015 / 55 - 54

= 1/1= 1

Thus, the answer is 1.

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Answer:

Step-by-step explanation:

To find the speed of a cyclist, divide the distance traveled by the time taken.

In this case, the speed is:

3.75 miles ÷ 0.3 hours = 12.5 miles per hour (mph)

So, the cyclist was traveling at a speed of 12.5 mph.

Answer:

Step-by-step explanation:

Answer should be 12.5 mph.

The summation of the series ¹³∑ₙ₎ ₁ (3n - 1) is 260.

Given the summation in the question;

¹³∑ₙ₎ ₁ (3n - 1)

First, we split the summation into smaller summations that fits the summation rule.

¹³∑ₙ₎ ₁ (3n - 1) = 3 ¹³∑ₙ₎ ₁ (n) + ¹³∑ₙ₎ ₁ (- 1)

Now, lets evaluate 3 ¹³∑ₙ₎ ₁ (n).

Using the formula for the summation of a polynomial with degree 1

ⁿ∑ₐ₎ ₁ (a) = n( n + 1 ) / 2

Plug in the values

3 ¹³∑ₙ₎ ₁ (n) = (3) (( 13(13+1))/2)

3 ¹³∑ₙ₎ ₁ (n) = (3) (( 13(14))/2)

3 ¹³∑ₙ₎ ₁ (n) = (3) (182/2)

3 ¹³∑ₙ₎ ₁ (n) = (3) (91)

3 ¹³∑ₙ₎ ₁ (n) = 273

Next, evaluate ¹³∑ₙ₎ ₁ (- 1)

Using the formula for the summation of a constant

ⁿ∑ₐ₎ ₁ (c) = cn

Plug in the values

¹³∑ₙ₎ ₁ (- 1) = (-1)(13)

¹³∑ₙ₎ ₁ (- 1) = -13

Now, we add the results of the summation.

273 - 13

260

Therefore, the sum of the series is 260.

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Answer:

To make the smallest number with the cards 3, 2, 4, and 7, you can arrange them as 2, 3, 4, 7 to get the number 237.

To make the number closest to 5000, arrange the cards as 7, 4, 2, 3 to get the number 7243.

Step-by-step explanation:

The equation that represents the apex angle is x + 15° + 15° = 180°. And the measure of the apex angle is 150°.

The polygonal shape of a triangle has a number of sides and three independent variables. Angles in the triangle add up to 180°.

The two triangular legs and their opposing angles are congruent in an isosceles triangle.

If the base angle of an isosceles triangle measures 15°. And the angle of 15° is an isosceles angle.

Let the third angle be 'x'. Then the equation is given as,

x + 15° + 15° = 180°

x = 180° - 15° - 15°

x = 180° - 30°

x = 150°

The equation that represents the apex angle is x + 15° + 15° = 180°. And the measure of the apex angle is 150°.

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Answer:

Step-by-step explanation:

2nd one because if you use logic it works

btw this is a real answer

The total amount due on November 15th would be $1667.81

Let's first calculate the trade discount amount:

Suggested list price: $1400

Trade discount rate: 40/10 = 4%

Trade discount amount: $1400 x 4% = $56

After deducting the trade discount, the price becomes:

$1400 - $56 = $1344

Next, let's calculate the cash discount:

Amount after trade discount: $1344

Cash discount rate: 8/10 = 8%

Cash discount amount: $1344 x 8% = $107.52

After deducting the cash discount, the price becomes:

$1344 - $107.52 = $1236.48

Finally, let's calculate the total amount due:

Amount after cash discount: $1236.48

Markup rate: 35%

Markup amount: $1236.48 x 35% = $431.33

Total amount due: $1236.48 + $431.33 = $1667.81

So, the total amount due on November 15th would be $1667.81.

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For the quadratic equations -

1) f(x) = x² - 16x + 3 → Vertex form is y = 3(x - 8)² - 61 and vertex is (8,-61).

2) f(x) = 4x² + 24x - 7 → Vertex form is y = 4(x + 3)² - 43 and vertex is (-3,-43).

3) f(x) = -2x² - 8x + 9 → Vertex form is y = -2(x + 2)² + 17 and vertex is (-2,17).

What is a quadratic function?

A polynomial function with one or more variables, where the largest exponent of the variable is two, is referred to as a quadratic function. It is also known as the polynomial of degree 2 since the greatest degree term in a quadratic function is of second degree.

The quadratic equation is written in the form ax² + bx + c = 0.

The vertex form of a quadratic equation is -

y = a(x - h)² + k

The first equation is - f(x) = x² - 16x + 3.

Here, a = 1, b = -16 and c = 3

The formula for h is -

h = -b/2a

h = -(-16)/2(1)

h = 16/2

h = 8

The formula for k is -

k = c - (b²/4a)

k = 3 - [(-16)²/4(1)]

k = 3 - (256/4)

k = 3 - 64

k = -61

So, the vertex form is -

y = a(x - h)² + k

y = 3(x - 8)² - 61

The vertex is written as (h,k).

The vertex is (8,-61).

Therefore, the vertex form and vertex is y = 3(x - 8)² - 61 and (8,-61) respectively.

The second equation is - f(x) = 4x² + 24x - 7.

Here, a = 4, b = 24 and c = -7

The formula for h is -

h = -b/2a

h = -(24)/2(4)

h = -24/8

h = -3

The formula for k is -

k = c - (b²/4a)

k = -7 - [(24)²/4(4)]

k = -7 - (576/16)

k = -7 - 36

k = -43

So, the vertex form is -

y = a(x - h)² + k

y = 4(x + 3)² - 43

The vertex is written as (h,k).

The vertex is (-3,-43).

Therefore, the vertex form and vertex is y = 4(x + 3)² - 43 and (-3,-43) respectively.

The third equation is - f(x) = -2x² - 8x + 9.

Here, a = -2, b = -8 and c = 9

The formula for h is -

h = -b/2a

h = -(-8)/2(-2)

h = 8/-4

h = -2

The formula for k is -

k = c - (b²/4a)

k = 9 - [(-8)²/4(-2)]

k = 9 - (64/-8)

k = 9 + 8

k = 17

So, the vertex form is -

y = a(x - h)² + k

y = -2(x + 2)² + 17

The vertex is written as (h,k).

The vertex is (-2,17).

Therefore, the vertex form and vertex is y = -2(x + 2)² + 17 and (-2,17) respectively.

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So the slope of the scenario is $28 per hour, which indicates that the expense of the tour increases by $28 for every extra hour spent on it.

The slope of a line indicates its steepness. Slope is computed mathematically as "rise over run" (change in y divided by change in x). The slope-intercept form of an equation occurs when the equation of a line is stated in the form y = mx + b. The slope of the line is given by m. And b is the value of b in the y-intercept point (0, b). For example, the slope of the equation y = 3x - 7 is 3, while the y-intercept is (0, 7).

Here,

In this situation, the slope represents the rate of change in the cost of the tour with respect to the time spent on the tour. The slope of the situation can be calculated as the change in cost divided by the change in time.

Since the one-time fee is a fixed cost, it does not change with respect to the time spent on the tour. Therefore, the slope can be calculated as the rate of change in the cost due to the hourly fee of $28.

The slope can be represented as:

slope = Δcost/Δtime = $28/hour

So, the slope of the situation is $28 per hour, which means that for every additional hour spent on the tour, the cost of the tour increases by $28.

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Answer:

Below

Step-by-step explanation:

For RIGHT triangles

Cos (21°) = adjacent leg / hypotenuse

cos ( 21°) = x / 21

re-arrange to

21 * cos (21°) = x      then use calculator to find x = 19.6 units

( it may not look like it from the picture...but the picture is not drawn to scale :  a 21° angle is much smaller than pictured)

A dot plot is a graphical representation of data that shows the frequency of each data value on a number line by plotting dots above the values. A box plot is a graphical representation of data that depicts data distribution using five key values: minimum, first quartile, median, third quartile, and maximum.

The box plot in this case depicts the distribution of points awarded to dance teams in a competition. The minimum value is zero, the first quartile is fifty, the median is seventy, the third quartile is ninety, and the maximum value is one hundred.

"dot plot titled Dance Competition Points with Points on the x axis and Number of Teams on the y axis with 2 dots over 50, 1 dot over 70, 2 dots over 90, 1 dot over 100," is the dot plot that best represents the box plot data. This dot plot accurately reflects the data distribution in the box plot.

It shows two dots over 50 (representing two teams), one dot over 70 (representing one team), two dots over 90 (representing two teams), and one dot over 100 (representing one team) (representing 1 team). These values correspond to the box plot values and accurately represent the data distribution.

The other dot plots do not accurately reflect the distribution of the data as they either have incorrect values or incorrect frequencies for each value.

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[tex]{ \qquad\qquad\huge\underline{{\sf Answer}}} [/tex]

Area of a rectangle is given by :

[tex]\qquad \sf  \dashrightarrow \: area = l \times b[/tex]

[ l = Length, and b = width ]

[tex]\qquad \sf  \dashrightarrow \: x {}^{2} + 3x = (x + 3)(b)[/tex]

[tex]\qquad \sf  \dashrightarrow \: b = \dfrac{ {x}^{2} + 3x }{x + 3} [/tex]

[tex]\qquad \sf  \dashrightarrow \: b = \dfrac{ {x(}x^{} + 3) }{x + 3} [/tex]

[tex]\qquad \sf  \dashrightarrow \: b = x[/tex]

Next problem ~

[tex] \textsf{Number of stoppers fixed per minute = 25 } [/tex]

[tex] \textsf{1 stopper is fixed in = 1/25 minutes} [/tex]

[tex] \textsf{2250 stoppers are fixed in = 1/25 × 2250 = 90 minutes } [/tex]

Now, convert it into hours~

[tex]\qquad \sf  \dashrightarrow \:60 \: \: min = 1 \: \: hr[/tex]

[tex]\qquad \sf  \dashrightarrow \: 1 \: \: min = \dfrac{1}{60} \: \: hrs[/tex]

[tex]\qquad \sf  \dashrightarrow \: 90 \: \: min = \dfrac{1}{60} \times 90 \: \: hrs[/tex]

[tex]\qquad \sf  \dashrightarrow \: 90 \: \: min = \dfrac{3}{2} \: \: hrs[/tex]

[tex]\qquad \sf  \dashrightarrow \: 90 \: \: min = 1.5 \: \: hrs[/tex]

So, in total it would take 1.5 hours to fix stoppers on 2250 bottles.

Step-by-step explanation:

(g–f)

multiply by nine

9(g–f)or 9g–9f

Answer:

[tex]10.3x-10.3y[/tex]

Step-by-step explanation:

Distribute 10.3 to x and -y

[tex]10.3x-10.3y[/tex]

The value of the expression is 94.9

Algebraic expressions are expression with variables, terms, coefficients, factors and constants.

They are also made up of mathematical operations, such as;

From the information given, we have that;

8.3x + 7.5y

When x = 3 and y = 4

Substitute the values into the formula

8.3(3) + 7.5(4)

expand the bracket

24.9 + 60

Add the values

84. 9

Hence, the value is 84.9

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Answer:  NO/MN   =     QR/PQ

Answer:

[tex]\frac{NO}{MN}[/tex] = [tex]\frac{QR}{FQ}[/tex]

Step-by-step explanation:

∠ 0 ≅ ∠ R and ∠ M ≅∠ F

thus Δ NOM ≅ ∠ QRF ( by the AA postulate )

the ratios of corresponding sides are in proportion, so

[tex]\frac{NO}{MN}[/tex] = [tex]\frac{QR}{FQ}[/tex]