Starting at 1:00 p.m., the temperature changes −4
degrees Fahrenheit per hour. Write and solve an equation to find how many hours x
it will take to reach −1°
F.

The value of k is -3.

What is a tangent line?

The straight line that "just touches" the curve at a given location is referred to as the tangent line to a plane curve in geometry. It was described by Leibniz as the path connecting two points on a curve that are endlessly close to one another.

Here, we have

Given

x + y = k

y = x² + 3x

slope of tangent line = dy/dx = 2x+3

k is y-intercept of the tangent line

2x+3 = -1

x = -2

y = (-2)^2+3(-2)+1 = -1

The tangent line passes through the point (-2,-1)

k = x+y

k = -2 -1

k = -3

Hence, the value of k is -3.

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The required graph has been attached which represents negative 3.5 and negative 1.5 on the number line.

To indicate their position, all rational numbers can be plotted on a number line. Every point on the number line indicates how many units a number is away from zero and in which direction.

As per the question, the negative 3.5 placed on the number line is 3.5 units to the left of zero, and the negative 1.5 placed on the number line is 1.5 units to the left of zero. The number zero is the most essential position on the number line. All of the other locations on the number line are predicated on zero.

Thus, the required graph has been attached which represents negative 3.5 and negative 1.5 on the number line.

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The given expression of trigonometry is equivalent to cos(2θ).

trigonometry capability, in math, one of six capabilities (sine [sin], cosine [cos], digression [tan], cotangent [cot], secant [sec], and co-secant [csc]) that address proportions of sides of right triangles. These six geometrical capabilities comparable to a right triangle.

We have,

1 - tan^2(θ)/1 +  tan^2(θ)

Use 1 + tan^2(θ) = sec^2(θ)

1 - tan^2(θ)/ sec^2(θ)

1/ sec^2(θ) - tan^2(θ)/sec^2(θ)

Use tan(θ) = sin(θ)/cos(θ)

cos^2(θ) - sin^2(θ)×cos^2(θ)/cos^2(θ)

cos^2(θ) - sin^2(θ)

Using sin^(θ) + cos^2(θ) = 1

cos^2(θ) - (1 - cos^2(θ))

2cos^2(θ) - 1

Here we have 2cos^2(θ) - 1 = cos(2θ)

Then, simplification of given expression is cos(2θ).

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Correct question:

which expression is equivalent to 1 - tan^2(θ)/1 +  tan^2(θ) for all values of θ for which 1 - tan^2(θ)/1 +  tan^2(θ) is defined?

Answer:

30.

Step-by-step explanation:

First, we have to split up the equation:

(7 x 4) + (10 ÷ 5)

Now, we simplify:

(7 x 4) + (10 ÷ 5)

28 + 2

28 + 2 = 30.

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We can estimate with standard deviation of 8 that the true population mean length of adult corn snakes is between 53.88 and 62.12 inches.

What is standard deviation?

Standard Deviation is a measure that shows what quantity variation (such as unfold, dispersion, spread,) from the mean exists. the quality deviation indicates a “typical” deviation from the mean. it's a well-liked live of variability as a result of it returns to the first units of live of the info set.

Main body:

x = ​ 58

σ = ​ 8

n = ​ 25

z α/2​​ = ​ 2.576

(53.88, 62.12)

the given values σ=8, n=25, and z α/2=2.576 for a confidence level of 99%, we have

margin of error=(2.576)(8/√25)

≈ (2.576)(1.6)

≈4.12

With x¯=58 and a margin of error of 4.12, the confidence interval is

(58−4.12,58+4.12)

= (53.88 , 62.12).

therefore we can estimate with 99% confidence that the true population mean length of adult corn snakes is between 53.88 and 62.12 inches.

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Explained the quotient property "one of the properties of logarithms, the division becomes subtraction" has been explained with an example

In one of the properties of logarithms, the division becomes subtraction. That is the quotient property of the logarithm

Consider the two positive numbers x and y and a ≠ 0

Then,

[tex]log_a[/tex] (m /n) = [tex]log_a[/tex] m -  [tex]log_a[/tex] n

Here division became the subtraction

For example

To find the value of  [tex]log_2[/tex] (15/ 7) we will use the quotient property of logarithm, here the division of the numbers will be subtraction

[tex]log_2[/tex] (15 / 7) =  [tex]log_2[/tex] 15 -  [tex]log_2[/tex] 7

Therefore, the quotient property of the logarithm has been explained with example

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Answer:

7/8

Step-by-step explanation:42/48 divide both by 6 since that's the greatest common number that divides both

In 2.63  hours the prices of the two stocks be the​ same

Two or more expressions with an Equal sign is called as Equation.

Given,

The price of Stock A at 9 A.M. was $12.71.

Price has been increasing at the rate of $0.08 each hour

Price of Stock B was $13.21

The price has been decrease at the rate of $0.11 each hour.

We can write in the form of equation , to find how many hours will the prices of the two stocks be the​ same

12.71+0.08h=13.21-0.11h

0.11h+0.08h=13.21-12.71

0.19h=0.5

Divide both sides by 0.19

h=0.5/0.19

h=2.63

Hence, in 2.63  hours the prices of the two stocks be the​ same

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answer:

f(g(x))=4x^2-2

step-by-step explanation:

plug g(x) into f(x) to get f(g(x))=2(x^2-1). when this is simplified, you get the answer presented above. the correct answer would be the green option. hope that helps!

Answer:  The correct answer is 83

Step-by-step explanation:

Complete the equations within each set of brackets

(71+9+3)-(9-11+2)

71+9+3 = 83

9-11+2 = 0

Subtract the results

83 - 0 = 83

Answer:

∠BEC is supplementary to ∠AEB

∠AED and ∠BEC are a pair of vertical angles

When the height of the cylinder increased from 100 m to 1000 m, what happened to the amount of heat generated in the system is decreased by a factor of 10.

The potential energy formula is provided by

P.E. = m g h

When a body is at a height of 100 m, its potential energy is

P = mgx100x100=100mg

When a body is at a height of 1000 m, its potential energy is

P' = mxgx1000x1000

P' = 1000 mg

P' to P have a 10:1 ratio.

Thus, ten times as much heat is produced in the cylinder.

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The answer is D: It increased by a factor of 10.

The required simple interest of 10% of four year on principle amount is $857.

Simple interest depends on the chief measure of a credit or the first store in quite a while account. Straightforward interest doesn't build, and that implies a loan boss will just compensation interest on the chief sum and a borrower couldn't have ever to pay more interest on the recently gathered interest.

We have,

Amount of four year = $1200

simple interest = 10%

Let loaned amount is x

Then,

interest of four year =×4 x×10/100 = 4x/10

According,

x + 4x/10 = $1200

14x/10 = $1200

x = $12000/14

X = $857 (appox)

Thus, the required loaned amount is $857.

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Answer:

y=26x-+8

Step-by-step explanation:

The equation that will be used to solve the given question is [2.75x+3.10=27.85] and with the help of this equation we know that Aaden took a ride of 9 miles.

The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions.

For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.

So, we know that:
The pick-up fee that the company charges is: #3.10

Ride charges per mile: $2.75

Total fare price: $27.85

So, let x be the number of miles ridden, the equation that will be used to solve the given question will be:

2.75x + 3.10 = 27.85

Now, solve as follows:

2.75x + 3.10 = 27.85

2.75x = 27.85 - 3.10

2.75x = 24.75

x = 24.75/2.75

x = 9

Therefore, the equation that will be used to solve the given question is [2.75x+3.10=27.85] and with the help of this equation we know that Aaden took a ride of 9 miles.

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Answer:

3 is in the ones place

0 is in the tens place

9 is in the thousandths place

Step-by-step explanation:

thousands, hundreds, tens, ones (DECIMAL) tenths, hundredths, thousandths

Answer: D is correct

Step-by-step explanation: Another angle is needed to prove the triangles are congruent by the ASA theorem. The angle that needs to be added has to have segment QS in between it and angleQSR. The only angle that does that is angleRQS. For the 2nd triangle, do the same thing. The angle that needs to be added has to have segment ST in between it and angleUST. The only angle that does that is angleSTU.

The test statistic of null and alternative hypotheses for a test is 0.811.

69 of the 142 persons that were randomly chosen from a sample are found to meet the condition we are testing.

The sample proportion phat = 69 ÷ 142 = 0.489

n = 69

p = 0.54

the following are your test's null and alternate hypotheses:

[tex]H_0[/tex] : p = 0.54

[tex]H_a[/tex] : p < 0.54,

test statistic,

z = (phat - p) ÷ √(p × (1 - p) ÷ n)

z = (0.489 - 0.54) ÷ √((0.79 × 0.21) ÷ 42) = 0.811

A test statistic is a figure obtained from a statistical analysis. It explains how distant the observational values seem to be from the null hypothesis, which states that there is no correlation between the variables or distinction between the sample groups.

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Slope is "change in y over change in x".

    [tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

Using those two points, you'd have

    [tex]m=\dfrac{y_2-y_1}{x_2-x_1} = \dfrac{0-6}{3-0}=\dfrac{-6}{3}=-2[/tex]

Notice that doesn't match any of the listed answers.  The reason is that two of those answers aren't reduced.

If you reduce the first answer of [tex]\dfrac{6}{-3}[/tex], you have  [tex]\dfrac{6}{-3}=-2[/tex].  So that first answer is equivalent to the calculation above.

The answer from your list is the first one.

1/6  is the Dice roll probability that the sum is divisible by 6

What is Dice roll Probability ?

An event is a specific subset of the sample space in probability. The sample space, for instance, is equal to all of the values on the die, or the set, when just one die is rolled, as in the example above (1, 2, 3, 4, 5, 6). Each number in the set only appears once since the die is impartial. The frequency of each number is thus 1. We divide the event frequency (1) by the size of the sample space (6) to get the chance of rolling any one of the die's numbers, which comes out to 1/6.

The difficulty of computing probability more than doubles when two fair dice are rolled. This is so that rolling one die does not affect rolling another. A roll does not affect another roll. We apply the multiplication rule when dealing with independent occurrences. A tree diagram is used to show that there are 6 × 6 = 36 possibilities that can result from rolling two dice.

We know that whatever be the first four numbers , the fifth number will decide whether the sum is divisible by 6 or not

That is let , S= N+N5

Before adding N5 , we cannot say whether S is divisible by 6

N5 is chosen from 6 equally likely numbers ,1,2,3,4,5,6

P(N5) =1/6

Therefore  Dice roll probability that sum is divisible by 6 is 1/6

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Surface area of the box measuring 5 inches by 3 inches by 7 inches is 142 square inches.

The surface area of the object that refers to the overall space that is filled by its surfaces. Different 3D shapes in the geometry have various surface areas, which can be quickly estimated using the formulas. Two categories are used to classify the surface area:

Curved surface area or Lateral surface area

Surface area in total

Surface area of rectangle = 2 ( lb + bh + hl )

Dimensions of box = 5 inches by 3 inches by 7 inches

Hence,

Length = 5 inches

Breadth = 3 inches

Height = 7 inches

By putting it in formula of surface area of rectangle

= 2 ( lb + bh + hl )

= 2 ( 5*3 + 3*7 + 7*5 )

= 2 ( 15 + 21 + 35 )

= 2 * 71

 = 142 square inches

Hence, the total surface area of the box is 142 square inches.

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The new sale price of the product after the deduction of discount is $60

In order to solve the given task, use the concept of percentage.

New price of the product = Regular price of the product - (Percentage discount × Regular price of the product)

= 150 - (60% × 150)

= 150 - (0.6 × 150)

= 150 - 90

= $60

Consequently, the new selling price of the product is $60

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Answer: I = -13

Step-by-step explanation:

We just need to take the -11 -2 = -13.  A negative -11 subtracts negative 2 = -13

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Answer: -13

Step-by-step explanation:

The answer is negative 13 because a negative added by a negative equals a negative

The elevator is on the 42th floor on moving 22 floor up to the present location of 20th floor.

Regarding the posed query:

Thus,

Current position = 20 + 22

Current position = 42

Thus, the present location of the elevator is on 42th floor.

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Answer:

Figure B.

Step-by-step explanation:

Figure A uses what is visually similar in size cylinders to give a detailed image of the amount of money (assumingly as profit). Each given cylinder that is in similar size represents $200, and so it is easy to figure out how the amount of money per store.

In the case of Figure A,

Save Store = $400

Leff's Store = $800

Low Pricer = $1200

In the case of Figure B, however, while it gives a legend for price per cylinder of that proportion, it does not make use of the legend, and does not give a adequate legend to decipher the Figure. In essence, the data given in Figure B is useless as it makes no use of its legend.

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The percentage of increase in the population is  17 %

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the percentage increase in the population be = A

Now , the equation will be

The initial population of the city = 117,000

The increase in population of the city = 136,890

Now , the percentage increase in population is given by the formula

initial population of the city + ( A / 100 ) x  initial population of the city = increase in population of the city

So , on substituting the values in the equation , we get

Percentage increase in population = 117000 + ( A/100 ) x 117000 = 136890

117000 + ( A/100 ) x 117000 = 136890

Subtracting 117000 on both sides of the equation , we get

( A/100 ) x 117000 = 19890

Divide by 117000 on both sides of the equation , we get

A / 100 = 0.17

Multiply by 100 on both sides of the equation , we get

A = 17 %

Therefore , the value of A is 17 %

Hence , The percentage of increase in the population is 17 %

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The horse was worth it for $1800.

What is proportion?

A mathematical comparison of two numbers is called a proportion. Ratios and fractions are the main bases on which proportion is explained. Two ratios are equal when they are expressed as a fraction in the form of a/b, ratio a:b, and then a proportion. In this case, a and b can be any two integers.

Based on the given question condition, where, 'h' denotes the amount for the horse in dollars,  the proportion can be defined as:

or,  [tex]\frac{19200 + h}{12} = \frac{10450+h}{7}[/tex]

or, (19200 + h)7 = (10450 + h)12

or, 134400 + 7h = 125400 + 12h

or, 12h - 7h = 134400 - 125400

or, 5h = 9000

or, h = 9000/5 = 1800

Hence, the horse was worth $1800.

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4. a. The graph of the system is attached below.

b. The solution is: (-1, 3).

5. a. (2, 40) is the solution as shown by the graph.

b. (2, 40) means that both will complete 40 cranes after 2 days

On a graph, when two lines are plotted for different equations, the solution is the coordinates of the point where both lines intersect.

4. a. The graph of y = -3x is the red line in the image attached below, while that of y = x + 4 is the blue line. They both intersect each other at (-1. 3).

b. The solution of the system is therefore, (-1, 3).

5. a. Using the graph given that shows the lines of the equations of DeAndre and Leah, both lines intersect at (2, 40).

We can therefore state that the solution to the system as shown in the graph is: (2, 40).

b. In the context of the scenario given, the solution (2, 40) means that both will have completed equal amounts of 40 cranes after 2 days.

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