Give an example of a positive fraction c/d where -50 (c/d) > - 50

Answers

Answer 1

If c and d are positive, then -c/2>d/2  is an example of a positive fraction c/d that satisfies the inequality -50 (c/d) > - 50

We know that c/d is a positive fraction,

so c>0 and d>0.

Multiplying both sides of the inequality by -d (which is negative since d>0), we get:

-50(c/d)>-50(-d)

-50c>50d

Dividing both sides by 50 (which is positive), we get:

-c>d

-c/2>d/2

Since c and d are positive, this is an example of a positive fraction c/d that satisfies the inequality -c/2>d/2

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Related Questions

what are the two assumptions that must be met in order to construct a confidence interval for (population mean) when (population standard deviation) is known?

Answers

In order to construct a confidence interval for the population mean when the population standard deviation is known, two assumptions must be met. Firstly, the sample data must be a simple random sample from the population being studied.

Secondly, the variable being measured must have a normal distribution or the sample size must be sufficiently large. The first assumption of a simple random sample ensures that the sample is representative of the population being studied, which is necessary for valid statistical inference. The second assumption is necessary because the confidence interval calculation relies on the assumption that the sample mean follows a normal distribution. When the variable being measured has a normal distribution, the sample mean will also have a normal distribution regardless of the sample size. When the variable being measured does not have a normal distribution, the sample size must be large enough (typically at least 30) in order for the sample mean to follow a normal distribution due to the central limit theorem. By meeting these two assumptions, we can be confident in the accuracy of the resulting confidence interval for the population mean.

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A trapezoid has bases of lengths 30 and 50. Find the trapezoid's height if it's area is 400

Answers

The height of the trapezoid is H = 10 units

Given data ,

A trapezoid has bases of lengths 30 and 50

Now , the area of the trapezoid is A = 400 units²

where Area of Trapezoid = ( ( a + b ) h ) / 2

On simplifying , we get

400 = ( 30 + 50 ) ( H ) / 2

Multiply by 2 on both sides , we get

800 = 80 H

Divide by 80 on both sides , we get

H = 10 units

Hence , the height is H = 10 units

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can someone help, im stuck on this its urgent

Answers

The linear regression equation for the data is y=0.47x+23.3 and the projected test grade for a student with a homework grade of 62 is 63.

How to explain the regression

The linear regression equation for the data is y=0.47x+23.3.

The projected test grade for a student with a homework grade of 62 is:

y = 0.47(62)+23.3

y = 63.

The correlation coefficient is r=0.78, which indicates a strong positive correlation between homework grade and test grade. This means that students who do well on their homework tend to also do well on their tests.

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find sin A, cos A, and tan A.
2.
A
4
45°
B

Answers

Check the picture below.

[tex]\sin(A )=\cfrac{\stackrel{opposite}{2\sqrt{2}}}{\underset{hypotenuse}{4}}\implies \sin(A )=\cfrac{\sqrt{2}}{2} \\\\\\ \cos(A )=\cfrac{\stackrel{adjacent}{2\sqrt{2}}}{\underset{hypotenuse}{4}}\implies \cos(A )=\cfrac{\sqrt{2}}{2} \\\\\\ \tan(A )=\cfrac{\stackrel{opposite}{2\sqrt{2}}}{\underset{adjacent}{2\sqrt{2}}}\implies \tan(A)=1[/tex]

Please help!!! I really need to get this lesson done

Answers

The probability of choosing a green tile and then a blue tile is given as follows:

1/7.

How to calculate a probability?

The parameters that are needed to calculate a probability are listed as follows:

Number of desired outcomes in the context of a problem or experiment.Number of total outcomes in the context of a problem or experiment.

Then the probability is then calculated as the division of the number of desired outcomes by the number of total outcomes.

For each outcome, the probabilities are given as follows:

Green tile: 2/7.Blue tile: 3/6 = 1/2.

Hence the probability is given as follows:

2/7 x 1/2 = 1/7.

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help me asap please

Answers

Based on the characteristics of the line and parabola, the correct answer is:

A. [tex]\(y = \begin{cases} x^2 + 2, & x \leq 1 \\ -x + 2, & x > 1 \end{cases}\)[/tex]

Based on the given information, let's analyze the characteristics of the line and parabola to determine the correct representation:

1. Line: In the context of graphing, a line appears as a straight line that can extend in any direction across the coordinate plane. It can have a positive or negative slope, or be horizontal or vertical.

- The line passes through the points [tex](1,1), (2,0), (4,-2), and (8,-6).[/tex]

- It extends along the first and fourth quadrants.

- A closed dot is shown at the point (1,1).

2. Parabola: In the context of graphing, a parabola appears as a curved line. It can open upward or downward and can be concave or convex. The vertex of the parabola represents the lowest or highest point on the curve, and the axis of symmetry is a vertical line that passes through the vertex, dividing the parabola into two symmetric halves.

- The parabola passes through the points [tex](1,3), (-2,6), and (10,-3).[/tex]

- It extends along the first and second quadrants.

- An open dot is shown at the point (1,3).

- The vertex of the parabola lies at (0,2).

Given these characteristics, we can determine the correct representation:

The correct answer is:

A. [tex]\(y = \begin{cases} x^2 + 2, & x \leq 1 \\ -x + 2, & x > 1 \end{cases}\)[/tex]

Explanation: The equation [tex]\(y = x^2 + 2\)[/tex] represents the parabola, and the equation [tex]\(y = -x + 2\)[/tex] represents the line. The closed dot at (1,1) corresponds to the parabola, and the open dot at (1,3) corresponds to the line.

Therefore, the correct answer is A.

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find the general solution of the differential equation. use c1 and c2 to denote arbitrary constants. y''(t)=28e^4t sin6t

Answers

The general solution of the differential equation
y''(t) = 28e^(4t)sin(6t) is y(t) = c1e^(4t)sin(6t) + c2e^(4t)cos(6t).

To find the general solution of the differential equation
y''(t) = 28e^(4t)sin(6t), we can solve the homogeneous equation y''(t) = 0 and then find a particular solution for the non-homogeneous equation.


The homogeneous equation is y''(t) = 0, which has the general solution y(t) = c1 + c2t, where c1 and c2 are arbitrary constants.

To find a particular solution for the non-homogeneous equation, we can use the method of undetermined coefficients. Since the non-homogeneous term is of the form e^(4t)sin(6t), we can assume a particular solution of the form y_p(t) = Ate^(4t)sin(6t) + Bte^(4t)cos(6t). After taking the first and second derivatives, we can substitute them back into the original equation and solve for the coefficients A and B.
We obtain A = -7/200 and B = 3/100.

Therefore, the general solution of the differential equation
y''(t) = 28e^(4t)sin(6t) is y(t) = c1e^(4t)sin(6t) + c2e^(4t)cos(6t) - (7/200)te^(4t)sin(6t) + (3/100)te^(4t)cos(6t), where c1 and c2 are arbitrary constants.

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find the answer to the following subtraction problem by using the left to right algorithm.4222 - 2451

Answers

To solve 4222 - 2451 using the left-to-right algorithm, we start with the thousands place and subtract 2 from 4, which gives us 2. Then we move to the hundreds place and realize that we cannot subtract 4 from 2, so we need to borrow from the thousands place.

We start by subtracting the thousands place digits, then the hundreds, the tens, and finally the ones.

Starting with the thousands place, we have:

4 - 2 = 2

So we write down 2 as the leftmost digit of the answer.

Moving to the hundreds place, we have:

2 - 4 = -2

Since we cannot subtract 4 from 2, we need to "borrow" from the thousands place. We can do this by subtracting 1 from the 2 in the thousands place, making it a 1, and adding 10 to the hundreds place, making it 12.

Now we have:

12 - 4 = 8

So we write down 8 as the second digit of the answer.

Moving to the tens place, we have:

2 - 5 = -3

Again, we need to borrow. We can subtract 1 from the 1 in the thousands place, making it 0, and add 10 to the tens place, making it 12.

Now we have:

12 - 5 = 7

So we write down 7 as the third digit of the answer.

Finally, we move to the ones place:

2 - 1 = 1

So we write down 1 as the last digit of the answer.

Putting it all together, we have:

4222 - 2451 = 1771

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What’s the scale factor from ABC to DEF?

Answers

The scale factor from ABC to DEF is 2/5

Calculating the scale factor from ABC to DEF?

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

The triangles

From the triangles, we have the following parameters

Side length of ABC = 40

Corresponding side length of DEF = 16

Using the above as a guide, we have the following:

Scale factor of the dilation = Corresponding side length of DEF / Side length of ABC

So, we have

Scale factor of the dilation = 16/40

Evaluate

Scale factor of the dilation = 2/5

Hence, the scale factor of the dilation is 2/5

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if n is a positive integer, how many integers from 0 through 2n must you pick in order to be sure of getting at least one that is odd? how many integers must be picked in order to be sure of getting at least one that is even?

Answers

To guarantee to select at least one odd integer, pick one from {1,3,5,...,2n-1}. To guarantee at least one even integer, pick two from {0,2,4,...,2n}.

To be sure of getting at least one odd integer, you need to pick just one integer from the set {1,3,5,...,2n-1}. Any integer in this set is odd, so selecting just one integer guarantees that you will get an odd integer.

On the other hand, to be sure of getting at least one even integer, you need to pick two integers from the set {0,2,4,...,2n}. If you pick only one integer from this set, it could be an odd integer, which means you didn't get an even integer. But if you pick two integers, at least one of them must be even. This is because if you pick two odd integers, their sum will be even, and if you pick an even integer and an odd integer, their sum will be odd.

In summary, to be sure of getting at least one odd integer, you need to pick one integer from {1,3,5,...,2n-1}, and to be sure of getting at least one even integer, you need to pick two integers from {0,2,4,...,2n}.

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In circle X, m/VXW = 65°. Solve for x if mVW = (10x – 50)°. If necessary, round your answer to the nearest tenth. X V W​

Answers

Answer:

11.5

Step-by-step explanation:

65=10x-50
+50.     +50
=115=10x

The vertices of triangle XYZ are X(–1, 5), Y(–1, –2), and Z(–5, –2). What is the approximate distance between vertex X and vertex Z?

Answers

Step-by-step explanation:

From distance formula

(x

2

−x

1

)+(y

2

−y

1

)+(z

2

−z

1

)

AB=

1+4+1

=

6

AC=

36+5+9

=

56

=3

6

AC

AB

=

EC

BE

3

6

6

=

EC

BE

EC

BE

=

3

1

So now we can find point E

E=(

m

1

+m

2

x

1

x

2

+m

2

m

1

),(

m

1

+m

2

m

1

y

2

+m

2

y

1

),(

m

1

m

2

m

1

z

2

+m

2

z

1

)

E=(

4

−5+6

,

4

2+3

,

4

−6−6

)=E(

4

1

,

4

5

,−3)

Now we can find distance AE

AE=

(1−

4

1

)

2

+(1−

4

5

)

2

+(−3+3)

2

AE=

16

9

+8

16

1

+0

AE=

4

3

10

Find the amount of fencing (ft) needed to enclose a semi-circle having an area of 2.5 km2. Report result to nearest foot.

Answers

Answer:

Step-by-step explanation:

2.807 km × 3280.84 ft/km ≈ 9203.2 ft

Rounding this to the nearest foot, we get:

The amount of fencing needed to enclose the semi-circle is approximately 9203 feet.

A bag contains green and blue marbles. If two marbles are randomly selected from the bag, which statement best describes the complement of the event "both of the marbles are blue"? A. Both of the marbles are green. B. One or more of the marbles are blue. C. One or more of the marbles are green. D. Exactly one marble is blue and one marble is green.

Answers

The complement of the event "both of the marbles are blue" is the event "one or more of the marbles are not blue".

The complement of an event refers to all the outcomes that are not part of that event. In this case, the complement of the event "both of the marbles are blue" would include all outcomes where at least one of the marbles is not blue.

Let's analyze the given options:

A. Both of the marbles are green:

This option describes an event that is different from the complement.

It implies that both marbles are green, which is not the opposite of "both marbles are blue."

B. One or more of the marbles are blue:

This option correctly describes the complement of the event.

It includes all outcomes where at least one marble is not blue, which covers situations where one or both marbles are green.

C. One or more of the marbles are green:

This option is the same as option B.

It describes the complement of the event "both marbles are blue" accurately.

D. Exactly one marble is blue and one marble is green:

This option describes a specific outcome rather than the complement of the event.

It specifies a scenario where one marble is blue and the other is green, but it does not cover other possibilities.

Based on the analysis, the statement that best describes the complement of the event "both of the marbles are blue" is B.

One or more of the marbles are blue (or equivalently,

C. One or more of the marbles are green).

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suppose x = 4 sec a rewrite in terms of sine and cos

Answers

We can rewrite x = 4 sec a in terms of sine and cosine as x = 4/cos(a) = 4(1/cos(a)) = 4/[(1-sin^2(a))^0.5].

To understand why we can rewrite secant as a combination of sine and cosine, we can start with the definition of the secant function. The secant of an angle a is defined as the reciprocal of the cosine of a, or sec(a) = 1/cos(a). Using the Pythagorean identity, 1 = sin^2(a) + cos^2(a), we can solve for cos(a) to get cos(a) = (1 - sin^2(a))^0.5. Substituting this into the definition of secant, we get sec(a) = 1/[(1 - sin^2(a))^0.5]. Finally, multiplying both the numerator and denominator by 4, we get x = 4/[(1 - sin^2(a))^0.5], which is the desired form of x in terms of sine and cosine.


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Find the length of the curve r=θ2from θ=0toθ=8.Use the standard arc length formula.

Answers

The length of the curve is:

[tex]=\frac{(68)^\frac{3}{2}-8 }{3}[/tex]

Arc Length:

Using the arc length formula in terms of polar coordinates [tex]\int\limits\sqrt{r^2+(\frac{dr}{d\theta})^2 }[/tex]

To find the length of the curve we will use the formula:

[tex]\int\limits\sqrt{r^2+(\frac{dr}{d\theta})^2 }[/tex]

Now, Let us put it in the expression:

[tex]r = \theta^2\\\\\frac{dr}{d\thera} =2\theta[/tex]

Now the integral becomes:

[tex]=\int\limits^8_0 \sqrt{(\theta)^4+(2\theta)^2} \, d\theta\\ \\=\int\limits^8_0\theta \sqrt{(\theta)^2+4} \, d\theta\\[/tex]

Now using the substitution method:

[tex]\theta^2+4=t\\\\2\thetad\theta=dt\\\\=\int\limits\frac{\sqrt{t}dt }{2}\\ \\=\frac{t^\frac{3}{2} }{3}\\ \\=\frac{(\theta^2+4)^\frac{3}{2} }{3}[/tex]

Now, Let us plug in the values:

[tex]=\frac{(68)^\frac{3}{2}-8 }{3}[/tex]

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If the universal set contains natural numbers that are at most 25, and A is the set of multiples of 3 that are less than 20, define each set.
U=.
A =
A'=

Answers

The defined sets are as follows:

U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10....25}

A = {3, 6, 9, 12, 15, 18}

A' = {1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20, 21, 22, 23, 24, 25}

How to represent sets?

The universal set contains natural numbers that are at most 25. Natural numbers are counting numbers.

Therefore,

universal set = U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10....25}

A is the set of multiples of 3 that are less than 20. Therefore,

A = {3, 6, 9, 12, 15, 18}

A'(A prime) is the number that is not in the A set but is present in the universal set.

Therefore,

A' = {1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20, 21, 22, 23, 24, 25}

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what percent of 240 is 10.8? if necessary, round to four decimal places.

Answers

To find the percentage, we can use the formula: (part/whole) x 100%. In this case, the part is 10.8 and the whole is 240. So, substituting these values in the formula, we get (10.8/240) x 100% = 4.5%. Therefore, 10.8 is 4.5% of 240. To round to four decimal places, we can keep the first four digits after the decimal point, which gives us 4.5000%.


To find what percent of 240 is 10.8, follow these steps:

Step 1: Write the problem as a proportion using the given values.
x% = (10.8 / 240)

Step 2: Convert the percentage to a decimal by dividing x by 100.
x/100 = (10.8 / 240)

Step 3: Solve for x by cross-multiplying.
100 * 10.8 = 240 * x

Step 4: Divide both sides by 240 to isolate x.
x = (100 * 10.8) / 240

Step 5: Calculate the value of x.
x = 1080 / 240

Step 6: Simplify the fraction and, if necessary, round to four decimal places.
x = 4.5000

Therefore, 10.8 is approximately 4.5000% of 240.

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A spinner for a board-game is divided into four equal-sized sections colored red, green, yellow, and blue. If you land on a line between the colors, you keep spinning until you land on a color. Luke's turn is next. Which word or phrase describes the probability that he will land on white?

A. Unlikely

B. Certain

C. An equal chance or 50-50

D. Impossible ​

Answers

The words that describe probability that he will land on white is impossible. The Option D.

What is the probability that Luke will land on white?

Probability is math branch that deals with finding out the likelihood of the occurrence of an event.

Here, the spinner is divided into four equal-sized sections, the probability of landing on any specific color will be:

= Either of red, green, yellow or blue / 4

= 1/4.

it is mentioned that if Luke lands on a line between the colors, he keeps spinning until he lands on a color. This means that there is no chance of landing on white directly.

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Christina took out a loan of $98,500 at an interest rate of 12.6% compounded monthly. She paid off the loan in full over the course of exactly sixteen years. Assuming that Christina made the same payment every month for sixteen years, what was her monthly payment?

O $829.52
O $1,195.10
O $1,120.50
O $1.275.03

Answers

I think the answer is 1,195.10

1
Colors of Marbles in a Bag
Color Number
Red 8
Blue 10
Green 22
Total 40


The table shows the number of different colors of marbles in a bag. If a marble is chosen at random from the bag, what is the probability that the marble will be blue?

30
40


22
40


18
40


10
40

Answers

Answer: 30/40

Step-by-step explanation: 10 blue marbles - 40 = 30

how many arrangements are there of all the letters aabbccdefg with no pair of consecutive letters the same?

Answers

To calculate the number of arrangements of the given letters (aabbccdefg) with no pair of consecutive letters the same, we can use the concept of permutations with restrictions.

Let's consider the letters a, b, c, d, e, f, and g as distinct elements. We need to arrange these elements in such a way that no two consecutive letters are the same.

We can start by arranging the distinct elements (a, b, c, d, e, f, g) in a line, which can be done in 7! (7 factorial) ways.

Now, we need to consider the arrangements where the same letters are together. In this case, we have two pairs of repeated letters: (a, a) and (b, b).

We can treat each pair as a single entity. So, we have 6 elements to arrange: (aabb, c, d, e, f, g).

The 6 elements can be arranged in 6! ways.

Therefore, the total number of arrangements is 7! * 6!.

Note: If the repeated letters were not together, we would have to consider more cases and the calculation would be more complex.

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find the component form of v given its magnitude and the angle it makes with the positive x-axis. round your answer to four decimals. ‖v‖=8,θ=15°

Answers

Therefore, the component form of vector v is (7.7551, 2.0664) (rounded to four decimals).

To find the component form of a vector v given its magnitude and the angle it makes with the positive x-axis, we can use trigonometric functions to determine the x-component (v_x) and y-component (v_y) of the vector. In this case, we are given the magnitude of the vector ‖v‖ = 8 and the angle θ = 15°. The formulas for finding the components are:

v_x = ‖v‖ * cos(θ)

v_y = ‖v‖ * sin(θ)

Plugging in the given values, we have:

v_x = 8 * cos(15°)

v_y = 8 * sin(15°)

By evaluating these trigonometric functions, we can calculate the values:

v_x ≈ 8 * cos(15°) ≈ 7.7551

v_y ≈ 8 * sin(15°) ≈ 2.0664

These values represent the x-component and y-component of the vector v, respectively. So, the component form of vector v is approximately (7.7551, 2.0664) (rounded to four decimals).

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Differential Equation
Consider the system of differential equations
dxdt=?5ydydt=?5x.
Convert this system to a second order differential equation in y by differentiating the second equation with respect to t and substituting for xfrom the first equation.
Solve the equation you obtained for y as a function of t; hence find x as a function of t. If we also require x(0)=4 and y(0)=1, what are x and y?

Answers

The general solution of this differential equation is y(t) = c1 cos(5t) + c2 sin(5t), where c1 and c2 are constants determined by the initial conditions.

Differentiating the second equation with respect to t, we get: d^2y/dt^2 = -5 dx/dt, Substituting dx/dt from the first equation, we get: d^2y/dt^2 = -5(-5y) = 25y.

This is a second order differential equation in y. The general solution of this differential equation is y(t) = c1 cos(5t) + c2 sin(5t), where c1 and c2 are constants determined by the initial conditions.

To find x as a function of t, we can substitute y(t) into the first equation and solve for x: dx/dt = -5y = -5(c1 cos(5t) + c2 sin(5t)) , Integrating both sides with respect to t, we get: x(t) = -c1 sin(5t) + c2 cos(5t) + k

where k is a constant of integration. Using the initial conditions x(0) = 4 and y(0) = 1, we can solve for the constants c1, c2, and k: x(0) = -c1 sin(0) + c2 cos(0) + k = c2 + k = 4, y(0) = c1 cos(0) + c2 sin(0) = c1 = 1

Substituting c1 = 1 and c2 + k = 4 into the equation for x, we get:

x(t) = -sin(5t) + 4

So the solution to the system of differential equations with initial conditions x(0) = 4 and y(0) = 1 is x(t) = -sin(5t) + 4 and y(t) = cos(5t).

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HELP ASAP 100 POINTS AND BRAINLIEST IF CORRECT IF WRONG I WILL REPORT!!
Which data set has a variation, or mean absolute deviation (MAD), similar to the data set in the given plot?

Answers

Answer:c

Step-by-step explanation::Add all the absolute deviations and divide by number of swimmers. Step-by-step explanation:

problem: a radio tower is located 615 feet from a building. from a window in the building, a person determines that the angle of elevation to the top of the tower is 42 degrees and that the angle of depression to the bottom of the tower is 34 degrees. how tall is the tower in exact form (in terms of the trig functions) and to the nearest integer?

Answers

The height of the tower is 969 feet.

Let CD be the tower and A be the point from a window in the building, a person determines that the angle of elevation to the top of the tower is 42 degrees.

In triangle AED

tan42° = ED/AE

tan42° = h₁/615

h₁ = tan42° × 615

= 553.74

Rounding to the nearest integer

h₁ = 554

In triangle AEC

tan34° = EC/AE

tan34° = h₂/615

h₂ = tan34° × 615

= 414.82

Rounding to the nearest integer

h₂ = 415

Height of tower = EC + ED

= h₁ + h₂

= 554 + 415

= 969

Therefore, the height of the tower is 969 feet.

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Given f(x) = -x² - 10x - 9, find f(-1)

Answers

f(-1) = -1 + 10 - 9 = 0

Answer:

0

Step-by-step explanation:

Given

f ( x ) = - x² - 10x - 9

To find : f ( - 1 )

x = 1

f ( 1 ) = - ( - 1 )² - 10 ( - 1 ) - 9

       = - 1 + 10 - 9

       = 10 - 9 - 1

       = 10 - 10

f ( 1 ) = 0

What method is best for solving for X^2-8x+16=0? Factor method,square root method or Quadratic formula method. And explain why.

Answers

The best method for solving X² - 8x + 16=0 is the factor method. This is because the given quadratic equation has two identical factors.

Using the factor method, we can factorize the quadratic expression as (X-4)² =0. This can be solved easily by taking the square root of both sides, which gives us X - 4 = 0 or X = 4.

The square root method would also work in this case since the quadratic expression is a perfect square trinomial. However, it is more efficient to use the factor method since it only involves factoring and solving a linear equation, while the square root method requires taking square roots of both sides of the equation.

The quadratic formula method would also work for solving this equation, but it is more complicated and time-consuming compared to the factor method.

Therefore, the factor method is the best method for solving X²- 8x + 16=0

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What is the value of n

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In the triangle, value of n is,

n = 16

We have to given that;

In triangle KMN,

MN = 24 yards

KL = 30 yards

LM = 15 yards

Hence, By proportionality theorem we get;

⇒ MN / KM = OL / KL

⇒ 24 / 45 = n / 30

Solve for n;

⇒ 24 × 30 / 45 = n

⇒ n = 16

Thus, In the triangle, value of n is,

n = 16

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Please please please help please

Answers

Answer:

(10,13)

Step-by-step explanation:

the distance from A to D is 8. you can see that from subtracting the x coordinates 10-2=8.

This is a square so all the sides are equal. To find C, add 8 to the Y coordinate from point B.

5+ 8 = 13

so c is at (10,13)

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