The total mass of a trolley and some watermelons is 27 kg.
The total mass of the same trolley and some mangoes is 11 kg.
The mass of the watermelons was thrice the mass of the mangoes.What is the kg of the watermelons and the mangos?

Answer:

x = - 3 , x = 4

Step-by-step explanation:

to find the zeros let f(x) = 0 , that is

(2x + 6)(x - 4) = 0

equate each factor to zero and solve for x

2x + 6 = 0 ( subtract 6 from both sides )

2x = - 6 ( divide both sides by 2 )

x = - 3

x - 4 = 0 ( add 4 to both sides )

x = 4

the zeros are x = - 3 , x = 4

We have shown that the left-hand side of the equation is equal to the right-hand side of the equation, and the trigonometric identity is proved.

We have,

(cos 2x + cos 4x)/(cos 2x - cos 4x)

We can use the identity cos 2A = 1 - 2sin² A to rewrite cos 4x as:

cos 4x = 1 - 2sin² 2x

Then, substituting this into the expression, we get:

(cos 2x + 1 - 2sin² 2x)/(cos 2x - 1 + 2sin² 2x)

Using the identity sin² A = 1 - cos^2 A, we can rewrite sin² 2x as:

sin² 2x = 1 - cos² 2x

Substituting this into the expression, we get:

(cos 2x + 1 - 2(1 - cos² 2x))/(cos 2x - 1 + 2(1 - cos² 2x))

Simplifying the numerator and denominator separately, we get:

(2cos² 2x + 1)/(2cos² 2x - 1)

Using the identity cot A = 1/tan A, we can rewrite tan 3x as:

tan 3x = sin 3x/cos 3x

We can then use the identity sin 3A = 3sin A - 4sin^3 A and

cos 3A = 4cos³ A - 3cos A to rewrite sin 3x and cos 3x as:

sin 3x = 3sin x - 4sin³ x

cos 3x = 4cos³ x - 3cos x

Substituting these expressions into the right-hand side of the equation, we get:

cot 3x/tan x = (cos x/sin x)/(3sin x - 4sin³ x)/(cos x)

Simplifying by multiplying the numerator and denominator by the reciprocal of the fraction in the denominator, we get:

cot 3x/tan x = (cos x/sin x) * (cos x)/(3sin x - 4sin^3 x)

Multiplying the two fractions together, we get:

cot 3x/tan x = cos^2 x/(sin x(3 - 4sin^2 x))

Using the identity 1 - cos^2 A = sin^2 A, we can rewrite cos^2 x as:

cos^2 x = 1 - sin^2 x

Substituting this into the expression, we get:

cot 3x/tan x = (1 - sin^2 x)/(sin x(3 - 4sin^2 x))

Simplifying the numerator and denominator separately, we get:

cot 3x/tan x = (1/sin x) x (1 + sin x)/(3 - 4sin^2 x)

Using the identity 1 + sin A = 1/cos A, we can rewrite the expression as:

cot 3x/tan x = (1/sin x) x (1/cos x)/(3 - 4sin^2 x)

Finally, using the identity cot A = cos A/sin A, we can rewrite the expression as:

cot 3x/tan x = cos x/(sin x(3 - 4sin^2 x))

Therefore,

We have shown that the left-hand side of the equation is equal to the right-hand side of the equation, and the trigonometric identity is proved.

Learn more about trigonometric identities here:

https://brainly.com/question/14746686

#SPJ1

Answer:

$14.80

Step-by-step explanation:

First you need to subtract .50 from 2.35, which is 1.85.

Next you need to multiply 1.85 times 8.

1.85 x 8 = 14.80

Therefore, she has made $14.80 since the new price.

Answer: C) 15 cm, D) 10 cm

Step-by-step explanation:

Let's use the scale to convert the measurements on the drawing to real-life measurements in feet:

3 cm on the drawing = 4 feet in real life

To determine which lines on the drawing would be greater than 12 feet in real life, we need to find the lines on the drawing that correspond to more than 12 feet in real life.

For each line on the drawing, we can convert its length to feet using the scale:

A) 12 cm = (12/3) * 4 = 16 feet

B) 6 cm = (6/3) * 4 = 8 feet

C) 15 cm = (15/3) * 4 = 20 feet

D) 10 cm = (10/3) * 4 = 13.33 feet

Therefore, the lines that are greater than 12 feet in real life are C) 15 cm and D) 10 cm.

Answer:

C + D

Step-by-step explanation:

Answer:

57 seven drinks sold each day 200 drinks a week

Step-by-step explanation:

The amount of work done, in foot-pounds, to lift a crate weighing 30 pounds a total of 3 feet is 90 foot-pounds.

To calculate the amount of work done, in foot-pounds, to lift a crate weighing 30 pounds a total of 3 feet, we need to use the formula:

Work = Force x Distance

In this case, the force is the weight of the crate, which is 30 pounds. The distance is the height the crate is lifted, which is 3 feet.

So, Work = 30 pounds x 3 feet

We can simplify this by converting pounds to foot-pounds, which is the unit used to measure work. To convert pounds to foot-pounds, we need to multiply the weight by the distance. So:

Work = 30 pounds x 3 feet = 90 foot-pounds

Therefore, the amount of work done, in foot-pounds, to lift a crate weighing 30 pounds a total of 3 feet is 90 foot-pounds.

To calculate the amount of work done, in foot-pounds, for lifting a crate weighing 30 pounds a total of 3 feet, you can follow these steps:

Step 1: Identify the weight of the crate (30 pounds) and the distance it is lifted (3 feet).
Step 2: Multiply the weight of the crate by the distance lifted.

Work (in foot-pounds) = Weight (in pounds) × Distance (in feet)

In this case:

Work = 30 pounds × 3 feet
Work = 90 foot-pounds

So, the amount of work done is 90 foot-pounds.

Learn more about Force at: brainly.com/question/13191643

#SPJ11

The work done to lift a crate weighing 30 pounds a total of 3 feet is:

Work = 30 pounds x 3 feet x cos(0 degrees) = 90 foot-pounds

So the amount of work done to lift the crate is 90 foot-pounds.

The amount of work done, in foot-pounds, to lift a crate weighing 30 pounds a total of 3 feet is given by the formula:

Work = Force x Distance x cos(theta)

where Force is the weight of the crate, Distance is the vertical distance lifted, and theta is the angle between the direction of the force and the direction of motion (which is 0 degrees in this case since the force is acting vertically upwards).

Therefore, the work done to lift a crate weighing 30 pounds a total of 3 feet is:

Work = 30 pounds x 3 feet x cos(0 degrees) = 90 foot-pounds

So the amount of work done to lift the crate is 90 foot-pounds.

Learn more about Force ,

https://brainly.com/question/13191643

#SPJ4

Answer:

Step-by-step explanation:

slope (m) =0

point =(x, y)

         =(3, -4)

equation:

(y-y1) =m(x-x1)

{y-(-4)} =0

y+4 =0

y =-4

Explanation:

as we know, the equation to find the slope of a line is (y-y1) =m(x-x1). here, it is given that the slope of the line (m) is 0 and it passes through points 3 and -4. therefore, we can conclude that equation (y) would be 0 by calculating.

We can write the equation as:

y = 80 sin(2π/5 t) + 280

Finding the oscillation's period will help us get started. Since the height repeats every five minutes, it appears from the graph that the period is five minutes.

The distance between the oscillation's highest and lowest points, or its amplitude, can then be determined. Given that 80 feet separate the highest and lowest points on the graph, it appears that the amplitude is 80 feet.

We  determine the vertical shift of the graph, which is the height of the Ferris wheel when t = 0. From the graph, it appears that the vertical shift is 280 feet, since that is the height of the car when t = 0.

Putting it all together, we can write the equation as:

y = 80 sin(2π/5 t) + 280

Learn more about shift of the graph at: https://brainly.com/question/20326468

#SPJ1

Answer:

To solve this problem, we need to calculate the compound interest on the loan over the 9-year period. We can break this down into two parts: the first 5 years, during which the interest rate is 7%, and the remaining 4 years, during which the interest rate is 11%.

For the first 5 years, we can use the formula for compound interest:

A = P * (1 + r/n)^(n*t)

where A is the amount after t years, P is the principal (the initial amount borrowed), r is the annual interest rate as a decimal, n is the number of times the interest is compounded per year, and t is the time in years.

In this case, P = $1350, r = 0.07, n = 1 (compounded annually), and t = 5. Plugging in these values, we get: A = 1350 * (1 + 0.07/1)^(1*5) = $1872.73 (rounded to the nearest cent)

So after 5 years, Imaan owes $1872.73.

For the remaining 4 years, we can use the same formula with r = 0.11 and t = 4: A = 1872.73 * (1 + 0.11/1)^(1*4) = $2959.77 (rounded to the nearest cent)

So after 9 years, Imaan owes $2959.77. However, this is the amount she would owe if she paid back the loan in a single payment at the end of 9 years. If she pays back the loan in installments, she will need to pay interest on the outstanding balance each year. Without information about the payment schedule, we can't calculate the exact amount she will have to pay back.

The amount Imaan has to pay back, after 9 years at 5% and 11% per annum interest, obtained using the compound interest formula is about $2,616

A compound interest is an interest calculated using based on the interest earned on from previous periods of the investment or loan.

The amount, A, Imaan pays back after 9 years can be obtained using the compound interest formula as follows;

A = P·(1 + r)ⁿ

Where;

P = The principal amount borrowed = $1,350

r = The interest rate = 7% and 11%

n = The number of years = 5 years and (9 - 5) years

The value of the loan after the first 5 years is therefore;

A = $1350 × (1 + 5/100)⁵ ≈ $1722.98

The value of the loan after the next four years, at 11% per annum, interest rate is therefore;

A = $1,722.98 × (1 + 11/100)⁴ ≈ $2616

The value of the loan, and the amount Imaan has to pay back after the 9 years is about $2,616

Learn more on the compound interest formula here: https://brainly.com/question/28134892

#SPJ1

The equation that represents the situation is 1/3x + 3/4(2/3x) + 4 = x, where x is the total distance. The athlete is planning to run a total distance of 24 miles.

Let x be the total distance the athlete is planning to run in three days. Then, the distance he plans to run on the first day is 1/3 of x, the distance he plans to run on the second day is 3/4 of the distance left after the first day, which is (2/3)x.

Finally, the distance he plans to run on the third day is 4 miles. The equation that represents the situation is

1/3x + 3/4(2/3x) + 4 = x

To solve for x, we can simplify the equation obtained in Part A

1/3x + 1/2x + 4 = x

Multiplying both sides by 6 to get rid of the fractions, we get

2x + 3x + 24 = 6x

Simplifying and solving for x, we get

x = 24

Therefore, the athlete is planning to run a total distance of 24 miles in the three days.

To know more about total distance:

https://brainly.com/question/28994474

#SPJ4

When we factor the expression, we are going to obtain the result;

9a(9a + 4) + 4

Factoring an expression involves breaking it down into simpler parts that can be multiplied together to obtain the original expression. The specific method used to factor an expression depends on the type of expression.

It's important to note that factoring can sometimes be a challenging process, and not all expressions can be factored using real numbers.

We can carry out this factorization by the use of the nesting method, Hence;

81a^2 + 36a + 4

(81a^2 + 36a ) + 4

9a(9a + 4) + 4

Learn more about factoring:https://brainly.com/question/14209188

#SPJ1

Answer:

To reflect a point over a vertical line x = c, where c is a constant, we can use the formula (2c - x, y).

Given the line of reflection x = -2, and the original points N(-5, 2), M(-2, 1), O(-3, 3), we can apply the formula as follows:

For N(-5, 2):

N' = (2(-2) - (-5), 2) = (1, 2)

For M(-2, 1):

M' = (2(-2) - (-2), 1) = (2, 1)

For O(-3, 3):

O' = (2(-2) - (-3), 3) = (1, 3)

So, the correct image vertices of N'M'O' after reflecting over x = -2 are N'(1, 2), M'(2, 1), O'(1, 3), which corresponds to the option:

N′(1, 2), M′(2, 1), O′(1, 3)

Please double-check to make sure if its right ;D

Answer:

(-1,-1)

Step-by-step explanation:

Rearange the equation

5y=6x+1 + 4y=-6x-10

9y = -9

y = -1

The only option with y as -1 is the second one

You can plug in -1 as x into any of the equations

5y=6x+1

-5 = -6+1

Hope this helps

The areas of the composite figures are listed below:

Case 6: A = 134.126 ft²

Case 7: A = 212.5 cm²

Case 8: A = 957.305 m²

Case 9: A = 316.643 in²

In this problem we find four cases of composite figure, that is, figures that are the result of adding and subtracting figures, whose area formulas are introduced below:

Semicircle

A = 0.5π · r²

Circle

A = π · r²

Triangle

A = 0.5 · b · h

Rectangle

A = b · h

Where:

Now we proceed to determine the area of each composite figure:

Case 6

A = (25 ft)² - π · (12.5 ft)²

A = 134.126 ft²

Case 7

A = (25 cm) · (14 cm) - 0.5 · (25 cm) · (11 cm)

A = 212.5 cm²

Case 8

A = 0.5π · [(21.6 m)² + (9 m)²] + 0.5 · (21.6 m) · (9 m)

A = 957.305 m²

Case 9

A = 0.5 · (20 in) · √[(25 in)² - (20 in)²] + (17 in) · √[(25 in)² - (20 in)²] - 0.5π · 0.25 · [(25 in)² - (20 in)²]

A = 316.643 in²

To learn more on areas of composite figures: https://brainly.com/question/23718948

#SPJ1

The correct statement is "The two triangles are the same shape but not the same size."

Both triangles will have three congruent sides and three congruent angles, which means they will be equilateral and equiangular. However, since the side lengths are different, the triangles will be different in size. In other words, one triangle will be larger than the other.

To see why they cannot be the same size, imagine drawing a line from one vertex of each triangle to the opposite side. Since both triangles are equilateral, these lines will bisect the opposite side and form two congruent right triangles. The hypotenuse of the larger triangle (with side length 5) will be longer than the hypotenuse of the smaller triangle (with side length 4), which means the two triangles are not the same size.

Learn more about triangles https://brainly.com/question/1058720

#SPJ1

(a) As we have shown that the differentiable function f decreases most rapidly at x in the direction opposite the gradient vector, that is, in the direction of −∇f(x).

(b) The direction in which f(x, y) = x³y − x²y³ decreases fastest at (4, -4) is the direction of the unit vector u = <-3/5, 4/5>.

To show that a differentiable function f decreases most rapidly at x in the direction opposite the gradient vector, we first need to define the directional derivative. The directional derivative of f at x in the direction of a unit vector u is denoted by Du f and is given by the dot product of the gradient vector ∇f(x) and u.

Du f = ∇f(x)·u

Now, we want to find the direction in which Du f is minimized. Let θ be the angle between ∇f(x) and u. Using the dot product formula, we have:

Du f = |∇f(x)| cos(θ)

where |∇f(x)| is the magnitude of the gradient vector. Since cos(θ) is maximum when θ = 0 (i.e., when u points in the same direction as ∇f(x)) and minimum when θ = π (i.e., when u points in the opposite direction of ∇f(x)), we can conclude that the direction in which f decreases most rapidly at x is opposite the gradient vector −∇f(x).

Now, let's apply this result to the function f(x, y) = x³y − x²y³ and find the direction in which it decreases fastest at the point (4, −4).

First, we need to find the gradient vector of f:

∇f(x, y) = <3x²y-2xy³, x³-3x²y²>

Evaluating at (4, -4), we have:

∇f(4, -4) = <192, -256>

The magnitude of the gradient vector is |∇f(4, -4)| = √(192² + (-256)²) = 320.

To find the direction of fastest decrease, we need to consider the opposite of the gradient vector:

−∇f(4, -4) = <-192, 256>

To make this a unit vector, we divide by its magnitude:

u = <-192, 256>/320 = <-3/5, 4/5>.

To know more about vector here

https://brainly.com/question/29740341

#SPJ4

Answer:

Factoring the polynomials and then simplifying:

[tex] \frac{ {x}^{2} - 20x + 91}{ {x}^{2} - 35x + 196} \times \frac{ {x}^{2} - 74x + 1288}{ {x}^{2} - 92x + 2116 } [/tex]

[tex] \frac{(x - 7)(x - 13)}{(x - 7)(x - 28)} \times \frac{(x - 28)(x - 46)}{(x - 46)(x - 46)} [/tex]

[tex] \frac{x - 13}{x - 46} [/tex]

Answer:

x−46

x−13

Step-by-step explanation:

Explanation in picture :)

A measurement that is the best estimate of the area of the banner in square meters include the following: A. 6 m².

In Mathematics and Geometry, the area of a trapezoid can be calculated by using this mathematical equation (formula):

Area of trapezoid, A = ½ × (a + b) × h

Where:

Based on the information provided about the two congruent trapezoid, we can logically deduce that they both have the same base area of 1 m.

This Means the total base of the entire triangle will be;

Base area = 1 + 1 ¾ + 1 + 1 ¾

Base area = 1 + 1.75 + 1 + 1.75

Base area = 5.5 m

Height of main triangle = 2 m

Area of banner = ½ × 5.5 × 2 = 5.5 ≈ 6.0 m²

Read more on trapezoid here: brainly.com/question/4758162

#SPJ1

Missing information:

The question is incomplete and the complete question is shown in the attached picture.

Complete Question:

An advertising banner has four sections, as modeled below. Two sections are congruent trapezoids, and two sections are congruent right triangles. Which measurement is the best estimate of the area of the banner in square meters?

6 m²

15 m²

8 m²

10 m²

The volume of the solid is (256π/15) - (128π/3) cubic units, which is formed by rotating the space bounded by y = 2x², y=0, and x = 2 around the line y = 8.

To find the volume of the solid formed by rotating the space bounded by y = 2x², y=0, and x = 2 around the line y = 8, we can use the disk method.

First, we need to find the bounds of integration. Since x = 2 is the right boundary, we can integrate from 0 to 2.

The distance between the line y=8 and the curve y=2x² is 8 - 2x². Therefore, the radius of the disk at a given x-value is 8 - 2x².

The area of each disk is given by π(radius)². Therefore, the volume of the solid is given by the integral of π(radius)² dx from 0 to 2;

V = ∫₀² π(8 - 2x²)² dx

This integral can be evaluated by expanding the square and using the power rule of integration. After simplification, we get;

V = (256π/15) - (128π/3)

Therefore, the volume of the solid is (256π/15) - (128π/3) cubic units.

To know more about volume of the solid here

https://brainly.com/question/12649605

#SPJ1

For a normally distribution of daily demand of fresh boston lettuce produce by skinner. the probability that skinner will have at least 20 units left over by the end of the day is equals the one.

Skinner produce buys fresh boston lettuce daily. There is daily demand is normally distributed,

Mean = 100 units

Standard deviations = 15 units

At beginning of the day skinner orders 140 units of lettuce. We have to determine the probability that skinner will have at least 20 units left over by the end of the day, P( X ≥ 20). Using the Z-Score for normal distribution is written as

[tex]z = \frac{ X - \mu}{\sigma} [/tex]

where, z --> z-score

X --> excepted value

--> standard deviations

--> population mean

Subsritute the known values in above formula, [tex]z = \frac{ 20 - 100}{15} [/tex]

= - 5.33

Now, probability value, P ( X < 20)

[tex]= P( \frac{X - \mu}{\sigma} < \frac{ 20 - 100}{15} )[/tex] = P( z < - 5.33 )

= 0.000

So, P( X < 20) = P( z< -5.33) = 0 . Also, required probability is P( X≥ 20) = 1 - 0

= 1

Hence, required value is one.

For more information about normal distribution, visit:

https://brainly.com/question/4079902

#SPJ4

The value of x is given as follows:

x = 9.40 cm.

The three trigonometric ratios are the sine, the cosine and the tangent, and they are defined as follows:

The parameters for this problem are given as follows:

Applying the cosine, the value of x is obtained as follows:

cos(20º) = x/10

x = 10 x cosine of 20 degrees

x = 9.40 cm.

More can be learned about trigonometric ratios at brainly.com/question/24349828

#SPJ1

The equation of the line of best fit is given as follows:

y = -1.25x + 8.3.

To find the regression equation, which is also called called line of best fit or least squares regression equation, we need to insert the points (x,y) in the calculator.

The points for this problem are given as follows:

(2, 5.8), (3, 4.55), (5, 2.05), (7, -0.45), (11, -5.45), (16, -11.7), (24, -21.7).

Inserting these points into a calculator, the equation is given as follows:

y = -1.25x + 8.3.

More can be learned about linear regression at https://brainly.com/question/29613968

#SPJ1

1. What is the relationship between education level and income in this population? 2. How does the popularity of different music genres vary across different age groups?

An interpretation is a way of understanding or explaining something. Interpretation often involves making connections between different elements or pieces of information to create a coherent understanding. It can also involve applying theories, frameworks, or methods to analyze or explain a particular subject. Ultimately, interpretations are subjective and may vary based on individual experiences and perspectives, making it important to consider multiple interpretations when analyzing a particular subject.

Here is two example questions:

1. What is the relationship between education level and income in this population?

Interpretation: To answer this question, you would need to examine a table that includes columns for education level and income, such as a cross-tabulation or a summary statistics table. You could look for patterns or trends in the data, such as higher incomes being associated with higher levels of education. You might also look for any outliers or anomalies in the data that could be affecting the overall relationship between education level and income.

2. How does the popularity of different music genres vary across different age groups?

Interpretation: To answer this question, you would need to examine a table that includes rows for different age groups and columns for different music genres, such as a frequency table or a bar chart. You could look for patterns or trends in the data, such as certain music genres being more popular among younger age groups or older age groups. You might also look for any outliers or anomalies in the data that could be affecting the overall relationship between age and music genre popularity.

To know more about interpretations visit:

brainly.com/question/30932003

#SPJ1

When calculating the composite shape's area, the value of x that is needed is: x = 3.

The internal angles of a rectangle, which has four sides, are all exactly 90 degrees. At each corner or vertex, the two sides come together at a straight angle. The rectangle differs from a square because its two opposite sides are of equal length.

The area a two-dimensional form occupies in a plane is known as its area. It has a square unit of measurement. As a result, the rectangle's area is the space enclosed by its exterior lines. It is the same as the length times the width calculation.

The following is the rectangle's area formula:

Area = length*width

Thus;

Area of rectangle = 21x

Area of rectangle = 16 * 3x = 48x

Since the total area is 207 cm², then we have;

21x + 48x = 207

69x = 207

x = 207/69

x = 3

The value of x=3 is the answer which is required in question.

To know more about rectangle visit:

https://brainly.com/question/29123947

#SPJ1

An appropriate tree diagram.
            /    \

           /      \

   0.6 /         \ 0.4

       /             \

     R               NR

    / \                /  \

  /     \             /       \

0.6    0.4    0.6    0.4

 R     NR     R        NR

Where R represents rain and NR represents no rain.

By using the multiplication principle, we can calculate the probabilities of all the outcomes by multiplying the probabilities along each path. The probability of there being no rain today and no rain tomorrow is the probability of following the path NR-NR, which has a probability of

P(NR-NR) = P(NR|NR) * P(NR) = 0.4 * 0.4 = 0.16

Hence, the probability that there will be no rain today and no rain tomorrow is 0.16 or 16%.

To know more about diagram here
https://brainly.com/question/1674772
#SPJ4