please answer asap i really need to know​

Answer:

They paid 81.4 all together.

Step-by-step explanation:

Multiply 44 times 1.85 as each person paid $1.85.

44*1.85=81.4

Answer:

a. Equation: 0.8x+30 = 1.2x+14

b. Solution: 40 Stickers

Step-by-step explanation:

"per sticker" means there will be a variable which will be how many stickers he buys next to the price and the fee is the amount of money that will be added onto the fee price.

Company A equation: 0.8x+30

Company B equation: 1.2x+14

You will set these equal to each other to find the number of stickers which cost the same for both companies, then solve for x by doing inverse operations.

0.8x+30 = 1.2x+14   [subtract 14 from both sides]

0.8x+16 = 1.2x          [subtract 0.8x from both sides]

16 = 0.4x                  [divide 0.4 from both sides]

x = 40                       [The solution is 40 stickers]

By multiplying both sides of the given equation by the integrating factor and simplifying, we arrive at the equation d -4x -4x =X e +(5 De-4 dx + -.

In the provided equation, the integrating factor is e^(-4x) due to the presence of -4x on the left side. By multiplying both sides of the equation by this integrating factor, we can simplify the equation.
The left side of the equation can be simplified using the chain rule and the choice of integrating function. Applying the integrating factor to the left side yields e^(-4x)(dy + 4y dx).
The right side of the equation remains unchanged as e^(-4x)(x^2 + 5) dx.
Combining the simplified left side and the right side of the equation, we have:
e^(-4x)(dy + 4y dx) = (x^2 + 5) e^(-4x) dx.
Now, we can divide both sides of the equation by e^(-4x) to cancel out the integrating factor. This results in:
dy + 4y dx = (x^2 + 5) dx.
Thus, the equation simplifies to d -4x -4x =X e +(5 De-4 dx + -.
Note: The provided equation seems to be incomplete and lacks some terms and operators. Therefore, the final expression is not fully determined.

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Answer:

About 11.62 by 11.62

A square had equal sides so you find the square root of 135 and that is rounded to 11.62.

So the perimeter would be about 46. But 46.48 exactly.

Answer:

P≈46.48

A= Area

135

Step-by-step explanation:

THE SILK ROAD

The first documented translation efforts by Buddhist monks in China were in the 2nd century CE via the Kushan Empire into the Chinese territory bordering the Tarim Basin under Kanishka.

Answer:

43cm

Step-by-step explanation:

Given

Length of Log = 291cm

First Piece = 67cm

Second Piece = 181cm

Required

Determine the length of the third piece

Given that the log was cut into three;

this implies that;

Length of Log = First Piece + Second Piece + Third Piece

Substitute values for first piece, second piece and length of log;

\(291 = 67 + 181 + Third\ Piece\)

\(291 = 248 + Third\ Piece\)

Subtract both sides by 248

\(291 - 248 = 248 - 248 + Third\ Piece\)

\(43 = Third\ Piece\)

\(Third\ Piece = 43\)

Hence, the length of the third piece is 43cm

Answer:

the answer is 0.85 of 2.38 ÷ 2.8

Answer:

0.85

Step-by-step explanation:

\(\frac{2.38}{2.8} =\frac{2.38}{2.8}*\frac{100}{100}=\frac{2.38*100}{2.8*100}=\frac{238}{280}\\\\\frac{238}{280}=\frac{238}{280}/\frac{14}{14} =\frac{238/14}{280/14}=\frac{17}{20}\\\\\frac{17}{20}=\frac{17/2}{20/2}=\frac{8.5}{10}=0.85\)

We have found the missing angle x = 60° using the angle sum property.

The triangle's angle sum property states that the sum of its angles can equal 180 degrees. Since a triangle has three sides, each of its vertices has an angle. Regardless of whether a triangle is acute, obtuse, or right-angled, its interior angles always sum to 180 degrees.

The triangle's angle sum property is one of the geometry's most frequently used properties. The main application of this property is in the calculation of the unknown angles. The angle sum property is used to calculate the measure of an unknown interior angle when the values of the other two angles are known.

Here,

Given that

Let the angles be y, z and x

y = 80°

z = 40°

x = ?

Using the angle sum property

Sum of the interior angle of a triangle = 180°

x + y + z = 180°

x + 80 + 40 = 180

x + 120 = 180

x = 180 - 120

x = 60°

Thus, we have found the missing angle x = 60° using the angle sum property

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Tutor answer 1603981404

Raoult's law equation, p1 = χ1 x p°1, relates the vapor pressure of a component in a solution to its mole fraction and the vapor pressure of the pure component.

In the equation p1 = χ1 x p°1, each term has a specific meaning:

p1 represents the vapor pressure of the component in the solution. Vapor pressure is the pressure exerted by the vapor phase when a substance is in equilibrium with its liquid phase at a given temperature.

χ1 is the mole fraction of the component in the solution. Mole fraction is a way to express the relative amount of a component in a mixture, defined as the ratio of the moles of the component to the total moles in the mixture.

p°1 refers to the vapor pressure of the pure component. It is the vapor pressure of the component when it is in its pure, undiluted state at the same temperature as the solution.

Raoult's law states that for an ideal solution, the vapor pressure of a component in a solution is directly proportional to its mole fraction in the solution and the vapor pressure of the pure component.

In other words, the partial pressure of a component in the vapor phase is equal to the mole fraction of that component multiplied by its vapor pressure in the pure state. This relationship assumes ideal behavior and is applicable for solutions where the intermolecular interactions between the components are similar.

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Answer:

A: $5.46

Step-by-step explanation:

28% of $19.50 is $5.46

The set of words that describes the end behavior of the function f(x)=−2x(3x^2+5)(4x−3) is: "falling as x approaches negative infinity and rising as x approaches positive infinity.

The end behavior of a polynomial function is described by the degree and leading coefficient of the polynomial function. This means that we can determine whether the function will increase or decrease by looking at the sign of the leading coefficient and the degree of the polynomial.

Since the given function f(x) is a polynomial function, we can analyze its end behavior by examining the degree and leading coefficient. It is observed that the degree of the polynomial function is 4 and the leading coefficient is -2. Thus, we conclude that the end behavior of the given polynomial function f(x) is described as falling as x approaches negative infinity and rising as x approaches positive infinity.

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Answer:

220

Step-by-step explanation: You just do inverse operation 55x4=220, check 220/4=55.

Answer:

x=220

Step-by-step explanation:

x /4 =55

Step 1: Multiply both sides by 4.

x/ 4  =55 ( x 4 )*(4)=(55)*(4)

x=220

Answer:

-7/2

Step-by-step explanation:

It's kinda hard to explain... just take the answer lol

Answer:

true

Step-by-step explanation:

<3

U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}.

A = {1, 3, 5, 7, 9}

B = {2, 4, 5, 6, 7}.

A = {1, 3, 5, 7, 9}

B' = {1,3,8,9,10}

A U B' = {1,3,5,7,8,9,10}

Answer:

A U B' = {1,3,5,7,8,9,10}

The optimal clutch size is 1.

a)The survivorship of an offspring, S, decreases with the clutch size, C.

Therefore, the formula is given as:

S = 0.5 - 0.1C

We need to find the optimal clutch size for this bird species.

We can do this by differentiating S with respect to C, and equating the result to zero.

That is:S = 0.5 - 0.1C => dS/dC = -0.1

Equating dS/dC to zero gives:-0.1 = 0 => C = 0

This implies that there is no optimal clutch size for this species.

However, since C represents clutch size, it must be a positive integer.

Therefore, we can choose a clutch size of 1, which will result in the highest survivorship of offspring. Hence, the optimal clutch size is

1.b)The optimal clutch size for a species with a survivorship-clutch size relationship of the form S = a - bC can be obtained by following the same procedure as above.

We can differentiate S with respect to C, and equate the result to zero.

That is:S = a - bC => dS/dC = -b

Equating dS/dC to zero gives:-b = 0 => C = 0

This implies that there is no optimal clutch size for this species. However, since C represents clutch size, it must be a positive integer. Therefore, we can choose a clutch size of 1, which will result in the highest survivorship of offspring. Hence, the optimal clutch size is 1.

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option 3

The mean is the same as the average.

Answer:

Let's start by using a proportion to find the total number of questions on the test. We know that Charles answered 23 questions correctly and received a grade of 92%, which means he missed 8% of the questions.

Let x be the total number of questions on the test. Then 8% of the questions that Charles missed can be expressed as 0.08x.

The number of questions that Charles answered correctly plus the number of questions he missed must add up to the total number of questions on the test:

23 + 0.08x = x

Simplifying and solving for x, we get:

0.92x = 23

x = 23 / 0.92

x ≈ 25

Therefore, the total number of questions on the test was approximately 25.

Answer:

-900

Step-by-step explanation:

Answer:-12x

Step-by-step explanation:

just trust me on this

When two tables have a one-to-many relationship, you typically need to add a foreign key to the table on the "many" side to link the records to the corresponding record in the "one" table.

In a one-to-many relationship, the table on the "one" side is usually the primary key table, and the table on the "many" side is usually the foreign key table. The foreign key is used to link the records in the "many" table to the corresponding record in the "one" table. This is done by adding a column to the "many" table that contains the primary key value from the "one" table.

When designing a database, it is important to establish relationships between tables to ensure data integrity and avoid redundant data. In a one-to-many relationship, one record in the primary key table can be associated with many records in the foreign key table. To establish a one-to-many relationship, you need to create a primary key in the "one" table and a foreign key in the "many" table. The foreign key is a column that contains the primary key value from the "one" table. For example, if you have a "customers" table and an "orders" table, the "customers" table would be the primary key table and the "orders" table would be the foreign key table. Each record in the "orders" table would have a foreign key column that contains the customer ID from the "customers" table.

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The diagonal face is the one with the largest area and the area is 67.7 square centimeters.

A right-angled prism is a solid shape made of two right angled triangles and two rectangles.

Analysis:

bottom one is a rectangle, area of rectangle = 12 x 4 = 48 square centimeter

Left one, is a right-angled triangle, area of triangle  = 1/2 x 4 x 4 = 8 square centimeter

Diagonal one, we calculate the diagonal of the right-angled triangle = \(\sqrt{4^{2} + 4^{2} }\) = 5.6cm

Area of diagonal one = 5.6 x 12 = 67.2 square centimeters

In conclusion, the diagonal with an area of 67.2 square centimeters is the one with the largest area

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Answer:

the person above me was close but the correct answer is actually the diagonal one with an area of 68.4, this is because its actually 5.7 x 12 not 5.6 x 12 (you have to round to the nearest tenth which they didn't do)

Step-by-step explanation:

I think this is the answer

Answer:

Step-by-step explanation:

M(-6, -1) being the midpoint of AB means that  \(x_M-x_A=x_B-x_M\)

\(-6-(-5)=x_B-(-6)\\\\-6+5-6=x_B\\\\x_B=-7\)

and   \(y_M-y_A=y_B-y_M\)

\(-1-3=y_B-(-1)\\\\-4=y_B+1\\\\y_B=-5\)

Answer:

13 feet

Step-by-step explanation:

Answer:

Step-by-step explanation:

Area of one face = 676 / 6

= 112.67

So the slide length = sqrt 112.67 = 10.6 feet.

The surface area is increasing at the rate of (60 x + 150) cm² per second.

Let the side of the cube be x cm.

s = x cm

Surface area of the cube will be:

S = 6 x² cm²

Now, we are given that, the side of the cube is expanding 5 cm per second.

So, the side of the cube after 1 second will be:

s' = x + 5 cm

Surface area will be:

S' = 6 (x + 5)² cm²

S' = (6x² + 150 + 60 x) cm²

Change in the surface area is:

ΔS = (6x² + 150 + 60 x) cm² - 6 x² cm²

ΔS = (60 x + 150) cm²

Therefore, the surface area is increasing at the rate of (60 x + 150) cm² per second.

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Answer:

answer is b

Step-by-step explanation:

The measure of angles:

∠S = 72

∠Q = 72

∠R = 180

In the given trapezium

∠P  = 108 degree

We know that for a trapezium,

The sum of the angles of two adjacent sides = 180°.

Therefore,

∠S + 108 = 180

⇒       ∠S = 72 degree

And

∠Q + 108 = 180

⇒        ∠Q = 72 degree

Now.

  ∠S + ∠R = 108

⇒ 72 + ∠R = 180

⇒         ∠R = 108 degree

Hence,

∠S = 72

∠Q = 72

∠R = 180

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The mass of salt in the tank at time t.

dS/dt = 10 - S/400

S(0) = 100 grams

The solution is S(t) = 4000 - 3900\(e^{\frac{-t}{400}}\)

A tank holds water V(0) = 4000 liters in which salt S(0) = 100 grams.

So dS/dt = S(in) - S(out)

S(in) = 1 × 10 = 10 gram/liters

S(out) = S/V × 10 = 10S/V gram/liters

V = V(0) + q(in) - q(out)

V = 4000 + 10t - 10t

V = 4000 liters

dS/dt = 10 - 10S/V

dS/dt = 10 - 10S/4000

dS/dt = 10 - S/400

Now given; S(0) = 100.

Here, p(t) = 1/400, q(t) = 10

\(\int p(t)dt = \int\frac{1}{400}dt\)\(\int p(t)dt = \frac{1}{400}t\)

\(\mu=e^{\int p(t)dt}\)

\(\mu=e^{\frac{t}{400}}\)

So, S(t) = \(\frac{\int\mu q(t)dt+C}{\mu}\)

S(t) = \(\frac{\int e^{\frac{t}{400}} \cdot10dt+C}{e^{\frac{t}{400}}}\)

S(t) = \(e^{\frac{-t}{400}} \left({\int e^{\frac{t}{400}} \cdot10dt+C}\right)\)

S(t) = \(e^{\frac{-t}{400}} \left({10\times\frac{e^{\frac{t}{400}}}{1/400} +C}\right)\)

S(t) = \(e^{\frac{-t}{400}} \left({4000\times{e^{\frac{t}{400}} +C}\right)\)

Now solving the bracket

S(t) = 4000 + \(e^{\frac{-t}{400}}\)C.....(1)

At S(0) = 100

100 = 4000 + \(e^{\frac{-0}{400}}\) C

100 = 4000 + \(e^{0}\) C

100 = 4000 + C

Subtract 4000 on both side, we get

C = -3900

Now S(t) = 4000 - 3900\(e^{\frac{-t}{400}}\)

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The complete question is:

A tank holds 4000 liters of water in which 100 grams of salt have been dissolved. Saltwater with a concentration of 1 grams/liter is pumped in at 10 liters/minute and the well mixed saltwater solution is pumped out at the same rate. Write initial the value problem for:

The mass of salt in the tank at time t.

dS/dt =

S(0) =

The solution is S(t) =