The temperature at midnight was -6 degrees celsius. By 7 am, it had risen 6.5 degrees. By noon, it had risen another 3.9 degrees. Then a storm blew in, causing it to drop 4/25 degrees by 6 am. what was the temperature at 6pm?​

Answer:  π

Step-by-step explanation:

The standard form of a secant equation is: y = A sec(Bx - C) + D   where

Given: F(x) = 2 sec(2x + 3)

                               ↓

                             B=2

Period = 2π/B

           = 2π/2

           = π

Answer:

watch the picture

Step-by-step explanation:

sum of all angles = 360°

c = 23° (opposite vertical angles so congruent)

b = (360° - 23 - 23) : 2    (opposite vertical angles so congruent)

b = 314 : 2

b = 157

----------------------

check

23 + 23 + 157 + 157 = 360°

the answer is good

Amy will earn $28.70 + $3.80 = $32.50.

Profit and loss:

A profit and loss (P&L) statement refers to a financial statement that summarizes the revenues, costs, and expenses incurred during a specified period, usually a quarter or fiscal year. These records provide information about a company’s ability or inability to generate profit by increasing revenue, reducing costs, or both. P&L statements are often presented on a cash or accrual basis. Company managers and investors use P&L statements to analyze the financial health of a company.

Amy will earn $28.70 from selling 7 large necklaces (7 x $4.10 = $28.70) and $3.80 from selling 1 small necklace, so in total, she will earn $28.70 + $3.80 = $32.50.

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6z-2z+4 4+2z-6z

4z+4 4-4z

No

Answer:

  39√2 feet

Step-by-step explanation:

You want the length of the diagonal of a square that is 39 feet on a side.

The Pythagorean theorem can be used to find the length of the diagonal. It tells you the length of the hypotenuse of a right triangle with legs 39 ft will be ...

  d² = 39² +39²

  d² = 39²(1 +1) = 39²·2

  d = √(39²·2) = 39√2

The length of the diagonal is 39√2 feet.

__

Additional comment

As you can tell from this answer, the length of the diagonal of any square is √2 times the length one side. Knowing this, you can write down the answer without any further effort.

Answer:

4

Step-by-step explanation:

-14+30

16/4

B) The data does not represent a proportional relation, but it has constant rate of change of $5 per shirt.

A)

Take number of T-shirts up to 3 and calculate their proportions.

2/1 = 15/10 = 1.5 (3/2) = 20/15 = 1.33

Clearly the rate of T- shirts is not proportional.

B)

From option (A) we found the given data is not proportional but from the table given in question the rate of change of T- shirts is indeed $5.

C)

No, there is a constant rate of change of $5 as shown in the table below.

D)

No, the data does not represent a constant proportionality. The rate varies.

2/1 = 15/10 = 1.5 (3/2) = 20/15 = 1.33

Rate of change is the rate that describes how one quantity changes relative to another quantity. If x is the independent variable and y is the dependent variable, then

rate of change change=change in y / change x  

Rate of change can be positive or negative. This corresponds to an increase or decrease in the y-value between two data points. If a quantity does not change over time, it is called zero rate of change.

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The function decreases on the intervals (-∞, -1) and (1.5, ∞).

Hence the decreasing intervals are given as follows:

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Yes, when dealing with a multi-value attribute with a variable number of values that need to be processed independently.

Yes, when dealing with a multi-value attribute with a variable number of values that need to be processed independently, it is recommended to consider creating a new dependent entity to represent the values. This can help to simplify the design and make it easier to manage and maintain. The new entity can be linked to the original entity through a relationship, allowing each value to be processed independently while still maintaining the integrity of the data. Overall, this approach can improve the efficiency and effectiveness of the system, making it easier to work with and providing better results for the end user.

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Answer:

6 - C > 29

Step-by-step explanation:

The answer is 18 ounces of salt in 20% solution should be mixed with 27 ounces of 10% solution to produce 45 ounces of 14% salt solution.

let x and y be the amount of 20% and 10% solutions respectively:

x + y = 45 ____eq.1

20%x + 10%y = 14% (45)

20/100x + 10/100 y = 14/100 (45)

0.2x + 0.1y = 0.14 (45)____eq.2

Rewrite eq.1 to (x=45-y) and plug that value into that of eq.2

0.2(45-y) + 0.1y = 6.3

9 - 0.2y + 0.1y = 6.3

-0.1y = -2.7

y = (-2.7) ÷ (-0.1)

y = 27

put the value of y in eq. 1

x + y = 45

x + 27 = 45

x = 45 - 27

x = 18

Therefore, 18 ounces of salt in 20% solution should be mixed with 27 ounces of 10% solution to produce 45 ounces of 14% salt solution.

Full Question:

How many ounces of a 20% salt solution should be mixed with a 10% salt solution to produce 45 ounces of a 14% salt solution?

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\(slope = \frac{rise}{run}\\\\m = \frac{y2 - y1}{x2 - x1}\)

9514 1404 393

Answer:

  y = 2x +5

Step-by-step explanation:

We can use the slope formula to find the slope of AB, which is the same as the slope of the parallel line. Then, we can use the point-slope equation for a line to find the desired equation.

  m = (y2 -y1)/(x2 -x1)

  m = (-8 -2)/(-1 -4) = -10/-5 = 2

__

  y -y1 = m(x -x1) . .  point-slope form of equation for a line

  y -5 = 2(x -0) . . . . fill in m=2, (x1, y1) = (0, 5)

  y = 2x +5 . . . . . . . rearrange to slope-intercept form

Answer:They are 600 feet apart from each other

Step-by-step explanation:

Answer:

600

Step-by-step explanation:

the 200 since its below the surface it would become negitive and 400 - -200 would turn into 400 + 200 and that would be 600 :)  

She did sell the newspapers for $.25 each at age 80. The equation is referred to as a linear equation in one variable if only one variable is present in the linear equation.

It is described as the relationship between two variables, and a straight line results from plotting the graph of the linear equation.

The information provided in the issue is;

One newspaper will set you back $.25.

Other newspapers are $.40 each.

The 100 newspapers were purchased for $28.00.

x is the quantity of newspapers sold for $.25 each.

Y stands for the other newspaper's number.

The total of both newspapers is one hundred.

x+y=100

y=100-x

25x+ 40y=28.00

25x+40(100-x)=2800

25x+4000-40x=2800

-15x+4000=2800

-15x=-1200

x=80

She therefore sold 80 newspapers for $.25 each.

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DE = AB, EF = BC and AC = DF, hence triangle ABC is congruent to triangle DEF.

Two shapes are said to be congruent if they have the same shape, all their corresponding angles and sides are congruent to one another.

Given that DE = AB and BC = EF.

In right triangle DEF, using Pythagoras:

DF² = DE² + EF²

Also, In right triangle ABC, using Pythagoras:

AC² = AB² + BC²

But DE = AB and EF = BC, hence:

AC² = DE² + EF²

AC² = DF²

Taking square root of both sides, hence:

AC = DF

Since DE = AB, EF = BC and AC = DF, hence triangle ABC is congruent to triangle DEF.

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pythagorean theorem, division, substatution, SAS

Step-by-step explanation:

edmentum

Step-by-step explanation:

remember the trigonometric triangle in the circle.

sine is the up/down leg, cosine is the left/right leg.

and because we are not in the norm-circle with radius 1, we have to multiply every trigonometric function by the actual radius (13).

so, we could pick any side I choose the shorter one :

5 = cos(theta)× 13

cos(theta) = 5/13 = 0.384615385...

theta = 67.38013505...° ≈ 67.4°

A ball is thrown vertically upward. As it rises, its kinetic energy decreases.

The kinetic energy of a moving object depends directly upon the square of its velocity, as the ball rises, the velocity decreases due to air friction and other factors, leading to decrease in its kinetic energy.

When we throw the ball in the upward direction, potential energy is transferred by us to the ball which helps the ball to rise upto a certain height, since the ball has gained kinetic energy.But as the height at which the ball keeps on increasing the kinetic energy decreases and at a certain point it becomes zero. The gravity continuously acts on the ball which leads to maximum potential energy. Thus the kinetic energy decreases and the potential energy increases.

Thus A ball is thrown vertically upward. As it rises, its kinetic energy decreases.

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Answer:

x=11

Step-by-step explanation:

These are alternate interior angles.  Alternate interior angles are equal when the lines are parallel

6x =2x+44

Subtract 2x from each side

6x-2x =2x+44-2x

4x =44

Divide each side by 4

4x/4 = 44/4

x = 11

The balanced chemical equations, of the combustion reactions found by plugging in the right coefficients in front of the molecules according to the rules of conservation of atoms are;

1) 2C + 2O₂ ⇒ 2CO₂

2) CH₄ + 2O₂ ⇒ CO₂ + 2H₂O

3) 2C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H₂O

A combustion reaction is one in which a combustible substance reacts with an oxidizer such as oxygen, to become oxidized.

1) 2C + ...O₂ ⇒ CO₂

The number of carbon atoms in the reaction side of the equation is 2, and the number of oxygen atoms in the reaction side are 2

In the product side of the equation, we get;

The number of carbon atoms = 1

The number of oxygen atoms = 2

The ratio of the number of oxygen atoms in the reaction side to the number of oxygen atoms in the product side = 1 : 1

The ratio of the number of carbon atoms in the reaction side to the number of oxygen carbon in the product side = 2 : 1

Multiplying the O₂ by 2 and the CO₂ by 2, we get;

2) CH₄ +... O₂ ⇒ CO₂ + ....H₂O

Reaction side;

Number of carbon atoms = 1

Number of hydrogen atoms = 4

Number of oxygen atoms = 2

Product side;

Number of carbon atoms = 1

Number of hydrogen atoms = 2

Number of oxygen atoms = 3

Set the coefficient of O₂ as 2, and the coefficient of H₂O as 2, we get;

The above equation is balanced

3) 2C₄H₁₀ + ...O₂ ⇒ ...CO₂ + ....H₂O

Reaction side;

Number of carbon atoms = 8

Number of hydrogen atoms = 20

Number of oxygen atoms = 2

Product side;

Number of carbon atoms = 1

Number of hydrogen atoms = 2

Number of oxygen atoms = 3

Multiply the O₂ by 13, the CO₂ by 8, and the H₂O by 10, we get the balanced equation as follows;

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1073.4 centimeters = 1.073 decameters

Answer:

107.34 decimeter

Step-by-step explanation:

The given functions ψ = 2xy and φ = x^2 - y^2 satisfy the conditions for continuity and irrotational flow.

To show continuity, we need to verify that the partial derivatives of ψ and φ with respect to x and y are equal. Let's calculate these partial derivatives:

∂ψ/∂x = 2y

∂ψ/∂y = 2x

∂φ/∂x = 2x

∂φ/∂y = -2y

From the above calculations, we can see that the partial derivatives of ψ and φ with respect to x and y are equal. Therefore, the condition for continuity, which requires the equality of partial derivatives, is satisfied.

To show irrotational flow, we need to verify that the curl of the velocity vector is zero. The velocity vector can be obtained from the stream function ψ and velocity potential φ as follows:

V = ∇φ x ∇ψ

Taking the curl of V:

∇ x V = ∇ x (∇φ x ∇ψ)

Using vector calculus identities and simplifying the expression, we find:

∇ x V = 0

Since the curl of the velocity vector is zero, the condition for irrotational flow is satisfied.

Therefore, based on the calculations and verifications, we can conclude that the given functions ψ = 2xy and φ = x^2 - y^2 satisfy the conditions for continuity and irrotational flow.

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Standard error (SE) is a measure of the variability of the sample mean estimate, and it is calculated using the sample size and the standard deviation of the population. Smaller SEs result in narrower confidence intervals (CI) while larger SEs result in wider CIs.

Social media (SM) can affect the width of a confidence interval by influencing the sample size and standard deviation. For instance, if the sample size is small, the CI will be wider than if the sample size is large, regardless of SM. However, SM can influence the sample size by providing access to a larger or smaller population.

In addition, SM can affect the standard deviation by introducing bias or error in the data collection process. For example, if a survey is conducted through SM and the responses are voluntary, the sample may not be representative of the population, leading to a larger standard deviation.

In summary, SM can impact the width of a CI by influencing the sample size and standard deviation, but other factors, such as the sampling method and level of precision desired, should also be taken into consideration.

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Answer:

(b1+b2)h divided by 2 is the formula for a trapezoid

Step-by-step explanation:

ANSWER: 468 ft (squared?)

Answer:

the answer is m=4

Step-by-step explanation:

Domain of the radical function of the form f(x) = √(ax + b) + c is given by the solution of the inequality ax + b ≥ 0 and the range is the all possible values obtained by substituting the domain values in the function.

We know that the general form of a radical function is,

f(x) = √(ax + b) + c

The domain is the possible values of x for which the function f(x) is defined.

And in the other hand the range of the function is all possible values of the functions.

Here for radical function the function is defined in real field if and only if the polynomial under radical component is positive or equal to 0. Because if this is less than 0 then the radical component of the function gives a complex quantity.

ax + b ≥ 0

x ≥ - b/a

So the domain of the function is all possible real numbers which are greater than -b/a.

And range is the values which we can obtain by putting the domain values.

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Answer:

90

Step-by-step explanation:

PVQ = 60 an RVS = 30,  60 + 30 = 90

Answer:

this is always true

( -infinity, infinity)

Step-by-step explanation:

BRAINLIEST PLSSSSS

x,y = 9,7. Took me a minute to do the math.