can someone answer this question for me pls n thanks

Answer:

Ratio is 11 : 13

Step-by-step explanation:

We are given;

Time to develop estimate = 30 minutes

Time to do the job = 2 hours 45 minutes = (2 * 60) + 45 = 165 minutes

Total time to develop and do job = 165 + 30 = 195 minutes

Thus;

Ratio of time spent on job to total time = 165 : 195

Whrn this is broken further, we have; 11 : 13

Answer:

D

Step-by-step explanation:

Lets look at all of the answer choices:

Choice A:  9%

= 0.09

Choice B: 0.125

= 0.125

Choice C = 7.8*10^-2

= 0.078

Choice D = 7/16

= 0.4375(THE ONLY ANSWER ABOVE 0.4)

Answer:

D, 0.4375

Step-by-step explanation:

A, 9% = 0.09

B, 0.125 = 0.125

C, 7.8 * 10^-2 = 0.078

D, 7/16 = 0.375

Your answer will be D, 0.4375 because the other values are less the 0.4.

The equation in rectangular coordinates. (x - 1)² + y² = 1

There are many types of coordinate system depending upon the usage and ease of working , Spherical , Rectangular , Cylindrical , Polar are the examples of Coordinate System.

It is given that the equation in polar coordinates is  r = 2 cosθ

To change in rectangular coordinates

The relation between polar and rectangular coordinate is

x = r cosθ and y = r sinθ

x² + y² = r²

r = 2 cosθ

r² = 2r cosθ

r² = x

so the equation in rectangular coordinate system becomes

x² + y² = 2x

x² - 2x + y² = 0

x² - 2x + 1 + y² - 1 = 0

(x - 1)² + y² = 1

This represents the equation in rectangular coordinates.

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Answer:

4.341 or 369÷85

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

.........................

Answer:

c

Step-by-step explanation:I think the answer might be C. because they have asked for the area and the formulae is side multiply by side.

The solutions for the given equation [tex]4x^2+x-3=0[/tex] are x = -1 and x = 3/4. Using the quadratic formula, the solutions for the given equation are calculated.

The formula which is used to calculate the roots(solutions) of the quadratic equation in the form [tex]ax^2+bx+c=0[/tex] is

x = [- b ± [tex]\sqrt{b^2-4ac}[/tex]]/2a

The given equation is [tex]4x^2+x-3=0[/tex]

In comparison with the standard form of quadratic equation [tex]ax^2+bx+c=0[/tex],

we get, a = 4, b = 1 and c = -3

So, solving the given equation using the quadratic formula,

x = [- b ± [tex]\sqrt{b^2-4ac}[/tex]]/2a

  = [- 1 ± [tex]\sqrt{1-4(4)(-3)}[/tex]]/2(4)

  = [-1 ± [tex]\sqrt{49}[/tex]]/8

  = (-1 ± 7)/8

Thus, x =  (-1 + 7)/8 = 3/4 and x = (-1-7)/8 = -8/8 = -1

Therefore, the solutions of the given equation are x = -1 and x = 3/4.

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Work Shown:

PR*RT = QR*RS

4*15 = 5*RS

60 = 5*RS

RS = 60/5

RS = 12

For more information, check out the intersecting chords theorem. This is the idea where multiplying pieces of two chords leads to the same product.  A chord is any segment where both endpoints are on the edge of the circle.

RS is equal to 12.

In a circle, two chords that intersect inside of a circle is given by this formula: PR * RT = QR * RS

Since these two chords are equal, we can set up this equation by putting what we know so far. Since PR * RT = 15 * 14 = 60, and QR * RS = 5 * RS, we get 5 * RS = 60. This is just a simple algebraic expression now.

Dividing by 5 from both sides, we get [tex]\frac{RS}{5}[/tex] = [tex]\frac{60}{5}[/tex].

We then get RS = 12. This wasn't so bad, right?

Hope this helped!

Answer:

t=1/2u

Step-by-step explanation:

Since t=tens digit and u=units digit, as given in the equation that means that t+u=9. Since the tens digit is one-half the units digit that means: [tex]t=\frac{1}{2}u[/tex] since it's one half the units digit.

Answer:

  1

Step-by-step explanation:

The probability that a random variable has a particular value or a range of values is the sum of the probabilities associated with each of the values.

All of the x-values in the table are less than or equal to 20, so p(x≤20) is the sum of all of the probabilities in the table.

  p(x≤20) = 0.20 +0.15 +0.05 +0.1 +0.25 +0.1 +0.15 = 1.00

The probability is 1 that x ≤ 20.

Your question is incomplete. Please read below to find the missing content.

Using the exponential distribution, it is found that:

a) There is a 0.0952 = 9.52% probability that a television set fails in less than 10,000 hours.

b) There is a 0.3012 = 30.12% probability that a television set lasts more than 120,000 hours.

c) There is a 0.1809 = 18.09% probability that a television set fails between 60,000 and 100,000 hours of use.

d) The 90th percentile is of 230,259 hours.

In probability theory and records, the exponential distribution is a non-stop possibility distribution that frequently issues the quantity of time till a few specific events happen. It is a method wherein activities show up continuously and independently at a regular common rate.

As an instance, the amount of time (starting now) until an earthquake occurs has an exponential distribution. Different examples consist of the duration, in mins, of long-distance enterprise phone calls, and the quantity of time, in months, a car battery lasts.

The lifetime of LCD TV sets follows an exponential distribution with a mean of 100,000 hours. Compute the probability a television set:

a. Fails in less than 10,000 hours.

b. Lasts more than 120,000 hours.

c. Fails between 60,000 and 100,000 hours of use.

d. Find the 90th percentile. So 10 percent of the TV sets last more than what length of time?

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Solution :

0.9

0.3012

0.1809

230258.

Given that:

μ = 100,000

λ = 1/μ = 1 / 100000 = 0.00001

a. Fails in less than 10,000 hours.

P(X < 10,000) = 1 - e^-λx

x = 10,000

P(X < 10,000) = 1 - e^-(0.00001 * 10000)

= 1 - e^-0.1

= 1 - 0.1

= 0.9

b. Lasts more than 120,000 hours.

X more than 120000

P(X > 120,000) = e^-λx

P(X > 120,000) = e^-(0.00001 * 120000)

P(X > 120,000) = e^-1.2

= 0.3011942 = 0.3012

c. Fails between 60,000 and 100,000 hours of use.

P(X < 60000) = 1 - e^-λx

x = 60000

P(X < 60,000) = 1 - e^-(0.00001 * 60000)

= 1 - e-^-0.6

= 1 - 0.5488116

= 0.4511883

P(X < 100000) = 1 - e^-λx

x = 100000

P(X < 60,000) = 1 - e^-(0.00001 * 100000)

= 1 - e^-1

= 1 - 0.3678794

= 0.6321205

Hence,

0.6321205 - 0.4511883 = 0.1809322

d. Find the 90th percentile. So 10 percent of the TV sets last more than what length of time?

P(x > x) = 10% = 0.1

P(x > x) = e^-λx

0.1 = e^-0.00001 * x

Take the In

−2.302585 = - 0.00001x

2.302585 / 0.00001

= 230258.5

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[tex]\Large\maltese\underline{\textsf{A. What is Asked}}[/tex]

How do the graphs f(x) and f^-1(x) relate?

[tex]\Large\maltese\underline{\textsf{B. This problem has been solved!}}[/tex]

These two functions are inverses of each other.

That's the way these two are related to each other.

f^-1(x) is the inverse function of f(x), and f(x) is the inverse function of f^-1(x).

[tex]\rule{300}{1.7}[/tex]

[tex]\bf{Result:}[/tex]

            [tex]\bf{=They\;are\:inverses}[/tex]

[tex]\boxed{\bf{\space aesthetic \space \not101}}[/tex]

Answer: They are reflections of each other.

Step-by-step explanation:

Type of statistical characteristics of variables found in a sample and describes summarizes and synthesizes collected data is a. Descriptive.

Descriptive statistics are used to describe or summarize the characteristics of a sample or data set, such as a variable's mean, standard deviation, or frequency.

Descriptive statistics can be used to describe a single variable (univariate analysis) or more than one variable (bivariate/multivariate analysis). In the case of more than one variable, descriptive statistics can help summarize relationships between variables using tools such as scatter plots.

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The table is

x | 4 | 8 | 12
y |  1 | 2 | 3

The question is not understandable. The well-formatted question is

Complete the table for the given rule

Rule:

[tex]y=\dfrac{1}{4}x[/tex]

Table:

x | 4 | 8 | 12
y |  ? | ? | ?

Evaluation of an algebraic expression when a specified integer is used to replace a variable is known as evaluating the expression. We use the provided number to replace the expression's variable before applying the sequence of operations to simplify the expression.

For instance

On evaluation of y= x+7  when x=3, and x=12

we get y(3) = 3 + 7 = 10 and y(12) = 12 + 7 = 19

The given equation is

[tex]y=\dfrac{1}{4}x[/tex]

So, the table is

x | 4 | 8 | 12
y |  1 | 2 | 3

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Answer:

0

12/4

1.75

in that order

In the equation, the value of x is 4 and y is 1.

From the information given,

2x - y = 7. ...... i

x + 2y = 6 ....... ii

Multiply equation i by 1

Multiply equation ii by 2

2x - y = 7.

2x + 4y = 12

Subtract both equations

-5y = -5

y = -5/-5

y = 1

From equation i

2x - y = 7.

2x - 1 = 7

2x = 7 + 1

2x = 8

x = 8/2

x = 4

Therefore, x = 4 and y = 1

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Answer:

146

Step-by-step explanation:

substitute x = 2, y = 3 into the expression

4(2)³ + 2(2)(3) - 2(3) + 3(2)²(3)²

= 4(8) + 12 - 6 + 3(4)(9)

= 32 + 12 - 6 + 108

= 38 + 108

= 146

Answer:

a.) 1003

Step-by-step explanation:

The formula to find the sum of an arithmetic sequence: Sn = n/2[2a + (n - 1)d], where a is the first term, n is the number of terms and d is the common difference.

1) Let's substitute the values into the formula.

S17 = 17/2[2(11) + (17 - 1)6]

S17 = 17/2[22 + (16)6]

S17 = 17/2[22 + 96]

S17 = 17/2[118]

S17 = 17/2 × 118

S17 = 1003

Therefore, the sum of the first 17 terms of this arithmetic sequence is 1003 (a).

Answer:

[-2.5, -2], [-2, -1.5], [1.5, 2] and [2, 2.5) were the  intervals show f(x) decreasing

A relation is a function if it has only One y-value for each x-value.

To find the intervals where a function is decreasing, you need to look for the parts of the function where the slope is negative.

In other words, you need to find the intervals where the function is going downhill.

By the given function or graph the intervals where f(x) is decreasing are

[-2.5, -2], [-2, -1.5], [1.5, 2] and [2, 2.5)

Hence, [-2.5, -2], [-2, -1.5], [1.5, 2] and [2, 2.5) were the  intervals show f(x) decreasing

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Answer:

True, False, False, False

Step-by-step explanation:

I'll find the lengths of all sides of the drawing before answering individual answers so that it's less confusing.

1) The question says that QR is a perpendicular bisector of TS. This means that the length of TQ and QS is the same. Also, since both triangles TRQ and SRQ share the same side RQ, and the angle between the two segments is 90 degrees, the two triangles are congruent (RTQ and RSQ) using SAS.

2) Side RT and TS will have the same length since the two triangles are congruent. (2x+1) = (4x-3) --> -2x = -4 --> x = 2. We can conclude that x = 2.

3) Now that we know that x = 2, we can find the length of side RS by replacing the x with 2. 4(2)-3 is 5, so RS = 5.

4) We can use the Pythagorean theorem to find RQ (Hypotenuse^2 = Other two sides added after being squared individually). Since the hypotenuse of triangle RSQ is RS which is 5, and one side is 4, we can input those into our equation. (5)^2 = (4)^2 + (RQ)^2. --> 25 = 16 + (RQ)^2 --> 9 = (RQ)^2 --> RQ = 3.

5) Since the two triangles RTQ and RSQ are congruent, side TQ and SQ also have the same length, since CPCTC (Corresponding parts of congruent triangles are congruent). QS is 4, so TQ will also be 4. This means that ST will be 8 (4+4). ST = 8

Now that we have all the clues, all we need to do is choose True or False.

RS = 5 is TRUE

RS = 4 is FALSE

ST = 10 is FALSE

QR = 4 is FALSE

The team can be formed in 420 different ways

This is a combination problem since we are to select a set of people from a group. Combination has to do with selection.

if r number of objects is to be selected from a pool of n objects, this can be done in nCr number of ways.

[tex]nCr=\frac{n!}{r!(n-r)!}[/tex]

Now If A company has 8 male and 6 female employees, and needs to nominate 2 men and 2 women for the company bowling team, then this can be done in the following way;

[tex]_{8} C_{2}=\frac{8!}{2!6!} =28\\_{6} C_{2}=\frac{6!}{2!4!} =15[/tex]

[tex]_{8} C_{2}*_{6} C_{2}=28*15[/tex]

[tex]=420[/tex] teams

Hence, The team can be formed in 420 different ways

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Based on the given information, the equation of this new circle is B. (x - h)² + (y - k)² = r²

The equation of a circle of radius r represents all the points that lie on the circumference of the given circle.

The equation of a circle is:

x² + y² = r²

Where:

r is the radius of a circle.

After translating h units along the x-axis and k units along the y-axis on a coordinate plane,

The equation of this new circle is given by:

(x - h)² + (y - k)² = r²

Where h and k represent the coordinates at the center.

Thus, option B is correct.

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Answer: B) (x - h)² + (y - k)² = r²

Step-by-step explanation:

Edge 2023

The given linear equation has one solution: (-0.6, 1.6). The correct option is the second option  one solution: (-0.6, 1.6)

From the question, we are to determine the number of solutions the given linear equation has

The given system of equations is

y = 2/3x+ 2    ---------- (1)

6x - 4y = -10   ---------- (2)

Substitute equation (1) into equation (2)

6x - 4y = -10

6x - 4(2/3x +2) = -10  

6x - 8/3x -8 = -10

6x - 8/3x  = -10 + 8

10x/3 = -2

10x = -2 × 3

10x = -6

x = -6/10

x = -0.6

Substitute the value of x into equation (1)

y = 2/3(-0.6)+ 2

y = -0.4 + 2

y = 1.6

The solution to the given system of equation is x = -0.6, y = 1.6. That is, (-0.6, 1.6)

Hence, the given linear equation has one solution: (-0.6, 1.6). The correct option is the second option  one solution: (-0.6, 1.6)

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Answer:

It will take 1 hour and 24 minutes.

Step-by-step explanation:

Given that:

Eastbound train travels at a rate of 65 miles per hour and Westbound train travels at a rate of 85 miles per hour

So speed = 65 + 85 = 150 miles per hour

Total distance = 210 miles

We have to find the time, we know that

Distance = time * speed

OR

Time = distance / speed

Time = 210/150

Time = 1.4 hours

Or it can be written as:

Time = 1 hour 24 minutes

Hope this helped :D

Answer:

19912/76000=0.262.000000

Answer:

Step-by-step explanation:

 19912 76000  

-152000 0.262  

  471200

 -456000

    152000

   -152000

         0

If the salesman chooses highway route 1 he will arrive in the shortest time because the distance in route 1 is less than the distance in route 2.

It is defined as the formula for finding the distance between two points. It has given the shortest path distance between two points.

The distance formula can be given as:

[tex]\rm d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

The question is incomplete.

The complete question is in the picture, please refer to the attached picture.

Route 1:

The distance between A and D

Distance of AB:

[tex]\rm AB=\sqrt{(400-0)^2+(300-0)^2}[/tex]

AB = 500 mi

Distance between BD:

[tex]\rm BD=\sqrt{(1300-400)^2+(1500-300)^2}[/tex]

BD = 1500 mi

In route 1 the distance traveled by salesman:

AD = 500 + 1500 = 2000 mi

Route 2:

[tex]\rm AC=\sqrt{(800-0)^2+(1500-0)^2}[/tex]

AC = 1700 mi

[tex]\rm CD=\sqrt{(1300-800)^2+(1500-1500)^2}[/tex]

CD = 500 mi

AD(through C) = 1700 + 500 = 2200 mi

Thus, if the salesman chooses highway route 1 he will arrive in the shortest time because the distance in route 1 is less than the distance in route 2.

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The simplified expression of [tex](4^3)(\frac{4^4^0x^4}{3^2x^2y^2})[/tex] is [tex]\frac{4^7x^2}{3^2y^2}[/tex]

The expression is given as:

[tex](4^3)(\frac{4^4^0x^4}{3^2x^2y^2})[/tex]

Expressions raise to power 0 is 1.

So, we have:

[tex](4^3)(\frac{4^4x^4}{3^2x^2y^2})[/tex]

Apply the law of indices to expression with common base

[tex](\frac{4^{4+3}x^{4-2}}{3^2y^2})[/tex]

Evaluate the sum and difference

[tex](\frac{4^7x^2}{3^2y^2})[/tex]

Remove the bracket

[tex]\frac{4^7x^2}{3^2y^2}[/tex]

Hence, the simplified expression of [tex](4^3)(\frac{4^4^0x^4}{3^2x^2y^2})[/tex] is [tex]\frac{4^7x^2}{3^2y^2}[/tex]

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Using the definition of congruent triangles, the missing measurements are:

23. m = 7; LO = 14; NO = 14

24. x = 15; m∠QTS = 90°

25. p = 3; IJ = 15; KJ = 15

26. r = 3; UW = 48

27. y = 7; m∠DEF = 50°

28. m = 5; p = 10

If two triangles are congruent, then all its corresponding sides and angles are equal.

23. The two triangles are congruent by SAS, therefore:

LO = NO

m + 7 = 2m

7 = 2m - m

7 = m

m = 7

LO = NO = m + 7 = 7 + 7 = 14

LO = 14

NO = 14

24. But triangles are congruent by SSS, therefore:

3x = 5x - 30

3x - 5x = -30

-2x = -30

x = 15

m∠QTS = 2(3x) = 6x = 6(15)

m∠QTS = 90°

25. Both triangles are congruent by ASA, therefore:

4p + 3 = 3p + 6

4p - 3p = -3 + 6

p = 3

IJ = KJ = 4p + 3 = 4(3) + 3 = 15

IJ = 15

KJ = 15

26. The two triangles are congruent by SAS, therefore:

5r + 9 = 8r

9 = 8r - 5r

9 = 3r

9/3 = r

r = 3

UW = 2(8r) = 16r = 16(3)

UW = 48

27. Both triangles are congruent by SSS, therefore:

3y + 4 = 5y - 10

3y - 5y = -4 - 10

-2y = -14

y = 7

m∠DEF = 2(3y + 4) = 6y + 8 = 6(7) + 8

m∠DEF = 50°

28. Both triangles are congruent by SSS, therefore:

2m = 10

m = 10/2

m = 5

2p - 5 = p + 5

2p - p = 5 + 5

p = 10

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Answer:

C

Step-by-step explanation:

the ratios of corresponding sides are in proportion

that is the outer triangle and the inner triangle

[tex]\frac{x}{30}[/tex] = [tex]\frac{88}{44}[/tex] = 2 ( multiply both sides by 30 to clear the fraction )

x = 30 × 2 = 60

Answer:

C. 60

Step-by-step explanation:

I just saw that 44 + 44 equals 88 and compared those two sides, I knew it couldn't be 88, so that's out.  Then, I saw that the side, 21 + 21, was shorter than the unknown side and that ruled out 42 and 30.  60 is the only one that is left and makes sense.