Find the difference.

(5x2 + 2x + 11) - (7 + 4x - 2x2)
A.
9 - 2x - 2x2
B.
3x2 - 2x + 4
C.
3x2 + 6x + 4
D.
7x2 - 2x + 4

Answer:

After 4 miles driven by cab the amount would be same in both cities.

Step-by-step explanation:

Let the number of miles be 'x'.

Given:

In NYC

Flat fee of cab = $4

Per mile charge = $1.25

Total cab charges is equal to sum of Flat fee of cab and per mile charge multiplied by number of miles.

Framing in equation form we get;

Total cab charges in NYC = [tex]4+1.25x[/tex]

In Chicago

Flat fee of cab = $6

Per mile charge = $0.75

Total cab charges is equal to sum of Flat fee of cab and per mile charge multiplied by number of miles.

Framing in equation form we get;

Total cab charges in Chicago = [tex]6+0.75x[/tex]

Now we need to find number of miles driven so that the amount could same in both cities.

Total cab charges in NYC = Total cab charges in Chicago

[tex]4+1.25x=6+0.75x[/tex]

Combining like terms we get;

[tex]1.25x-0.75x=6-4\\\\0.5x=2[/tex]

using Division Property we will divide both side by 0.5 we get;

[tex]\frac{0.5x}{0.5} =\frac{2}{0.5} \\\\x=4[/tex]

Hence After 4 miles driven by cab the amount would be same in both cities.

Answer:

Y=4x^5-12x^4+6x and y=5x^3-2x

Answer:

Y = 4x5 - 12x4 + 6x

Y = 5x3 - 2x

Step-by-step explanation:

Answer:

  2 1/2 cups

Step-by-step explanation:

5 × (1/2 cup) = 5/2 cup = 2 1/2 cup

__

Or, you can add them up. You know from your study of fractions that two half-cups make 1 cup.

  (1/2 cup) + (1/2 cup) + (1/2 cup) + (1/2 cup) + (1/2 cup)

  = ((1/2 cup) +(1/2 cup)) +((1/2 cup) +(1/2 cup)) +(1/2 cup)

  = (1 cup) + (1 cup) + (1/2 cup)

  = (2 cup) + (1/2 cup)

  = 2 1/2 cup

Option A

Interest rate paid by Samantha to bank is 8.6 %

Solution:

Given that George has a credit score of 650

Samantha has a credit score of 520

The bank approved George’s loan application at 5.6% interest

To find: Interest rate paid by samantha to the bank

From given information in question,

Interest charged on Samantha’s loan is 3 percentage points higher than the interest rate on George’s loan

Thus we get,

Interest charged on Samantha’s loan = 3 percentage points higher than the interest rate on George’s loan

Interest charged on Samantha’s loan = 3 % higher than the interest rate on George’s loan

Interest charged on Samantha’s loan = 3 % + interest rate on George’s loan

Thus substituting the given George’s loan application at 5.6% interest,

Interest charged on Samantha’s loan = 3 % + 5.6 % = 8.6 %

Thus interest rate paid by samantha to bank is 8.6 %

Final answer:

Option A: 8.6%

Samantha will pay an interest rate of 8.6% on her loan from Westside Bank, which is 3 percentage points higher than George's rate of 5.6% due to her lower credit score.

Explanation:

The question involves calculating the interest rate Samantha will pay to the bank for a personal loan.

Given that George has a credit score of 650 and was approved for a loan at 5.6% interest, and Samantha has a lower credit score of 520, her interest rate will be 3 percentage points higher than George's.

To find Samantha's interest rate, we simply add 3 percentage points to George's rate of 5.6%.

Samantha's interest rate = George's interest rate + 3%
Samantha's interest rate = 5.6% + 3%
Samantha's interest rate = 8.6%

A. x²-14x+49; is a polynomial

Step-by-step explanation:

(x-7)² can be written as (x-7)(x-7)

Expanding the expression

x(x-7)-7(x-7)

x²-7x-7x+49

x²-14x+49 ⇒⇒A quadratic function, which is a polynomial of degree 2

This function demonstrates the closer property of multiplication in that the change in order of multiplication does not change the product. This is called commutative property.

(x-7)(x-7)

-7(x-7)+x(x-7)

-7x+49+x²-7x

x²-14x+49

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Answer:

A is correct

Step-by-step explanation:

I took the test and got it right

Answer:16 days

Step-by-step explanation:

Given

John schedule is 4 Workdays and 5 th day off i.e. John take holiday at the 5 th day

Ling Work for 7 day and then took off on 8 th and 9 th day

i.e. after every 8 th and 9 th day he take off

So to find out common day off we nee take LCM of

i)5 and 8

ii)5 and 9

LCM(5,8)=40 i.e. after every 40 th day they had same day off

and there are 8 such days in 365 days

LCM(5,9)=45 i.e. after every 45 day they had same day off

and there are total of 8 days in 365 days

therefore there are total of 16 days in total out of 365 days

By computing the LCM of their work schedules, John and Ling will have the same day off 8 times during their first year of work.

This problem can be approached using the concept of Least Common Multiple (LCM) which is widely used in mathematics to solve similar problems. Here we need to calculate the frequency of John and Ling's common days off.

John's schedule repeats every 5 days (4 workdays followed by 1 day off) and Ling's schedule repeats every 9 days (7 workdays followed by 2 days off). To know how often they both have a day off on the same day, we need to find the LCM of 5 and 9. Interestingly, since 5 and 9 are prime to each other, their LCM will be their product, which is 45. Therefore, John and Ling will have a day off together every 45 days.

To know how many such days will be there in a year, divide 365 by 45 which equals 8.111. Since the number of days cannot be fractional, we take only the whole number part which is 8. So, during the first year of their work (365 days), John and Ling will have the same day off on 8 days.

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Answer: the lowest commission is $163.96

Step-by-step explanation:

Let x represent the lowest monthly commission that a salesman earned.

Let y represent the highest monthly commission that a salesman earned.

The lowest monthly commission that a salesman earned was only 1/5 more than 1/4 as high as the highest commission he earned. This means that

x = y/4 + 1/5 - - - - - - - - 1

The highest and lowest commissions when added together equal $819. This means that

x + y = 819

x = 819 - y - - - - - - -2

Substituting equation 2 into 1, it becomes

819 - y = y/4 + 1/5

Multiplying through by 20, it becomes

16380 - 20y = 5y + 4

25y = 16380 - 4 = 16376

y = 16376/25 = 655.04

x = 819 - 655.04 = 163.96

Answer:

13

Step-by-step explanation:

The diagonals of a rectangle are congruent.

I think 68 or56

It can't be 34 that would be less, 146 would be over quarter

Good evening ,

Answer:

Step-by-step explanation:

measure arc AB = 2×(m∠AXB) = 2×(34) = 68°.

:)

Answer: 5/7

Step-by-step explanation:please see attachment for explanation.

Answer:

  1 cm : 800 km   or   1/80,000,000

Step-by-step explanation:

A model or map scale is often expressed as ...

  (1 unit of A on the model) : (N units of B in the real world)

We're given the relative measurements as ...

  15 cm : 12,000 km

Dividing by 15 gives the unit ratio as above:

  1 cm : 800 km

__

A scale can also be expressed as a unitless fraction. To find that, we need to convert the units of both parts of this ratio to the same unit.

  0.01 m : 800,000 m

Multiplying by 100, we get ...

  1 m : 80,000,000 m

Since the units are the same, they aren't needed, and we can write the scale factor as ...

  1 : 80,000,000   or   1/80,000,000

Answer:

1. 96.08%; 2. x=764.8; 3. 63.31%; 4. 93.57%; 5. 99.74%

Step-by-step explanation:

The essential tool here is the standardized cumulative normal distribution which tell us, no matter the values normally distributed, the percentage of values below this z-score. The z values are also normally distributed and this permit us to calculate any probability related to a population normally distributed or follow a Gaussian Distribution. A z-score value is represented by:

[tex]\\ z=\frac{(x-\mu)}{\sigma}[/tex], and the density function is:

[tex]\\ f(x) = \frac{1}{\sqrt{2\pi}} e^{\frac{-z^{2}}{2} }[/tex]

Where [tex]\\ \mu[/tex] is the mean for the population, and [tex]\\ \sigma [/tex] is the standard deviation for the population too.

Tables for z scores are available in any Statistic book and can also be found on the Internet.

The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 500 and a standard deviation of 170. If a college requires a minimum score of 800 for admission, what percentage of student do not satisfy that requirement?

For solve this, we know that [tex]\\ \mu = 500[/tex], and [tex]\\ \sigma = 170[/tex], so

z = [tex]\frac{800-500}{170} = 1.7647[/tex].

For this value of z, and having a Table of the Normal Distribution with two decimals, that is, the cumulative normal distribution for this value of z is F(z) = F(1.76) = 0.9608 or 96.08%. So, what percentage of students does not satisfy that requirement? The answer is 96.08%. In other words, only 3.92% satisfy that requirement.

The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 630 and a standard deviation of 200. If a college requires a student to be in the top 25 % of students taking this test, what is the minimum score that such a student can obtain and still qualify for admission at the college?

In this case [tex]\\ \mu = 630[/tex], and [tex]\\ \sigma = 200[/tex].

We are asked here for the percentile 75%. That is, for students having a score above this percentile. So, what is the value for z-score whose percentile is 75%? This value is z = 0.674 in the Standardized Normal Distribution, obtained from any Table of the Normal Distribution.

Well, having this information:

[tex]\\ 0.674 = \frac{x-630}{200}[/tex], then

[tex]\\ 0.674 * 200 = x-630[/tex]

[tex]\\ (0.674 * 200) + 630 = x[/tex]

[tex]\\ x = 764.8 [/tex]

Then, the minimum score that a student can obtain and still qualify for admission at the college is x = 764.8. In other words, any score above it represents the top 25% of all the scores obtained and 'qualify for admission at the college'.

[...] The collagen amount was found to be normally distributed with a mean of 69 and standard deviation of 5.9 grams per milliliter.

In this case [tex]\\ \mu = 69[/tex], and [tex]\\ \sigma = 5.9[/tex].

What percentage of compounds have an amount of collagen greater than 67 grams per milliliter?

z = [tex]\frac{67-69}{5.9} = -0.3389[/tex]. The z-score tells us the distance from the mean of the population, then this value is below 0.3389 from the mean.

What is the value of the percentile for this z-score? That is, the percentage of data below this z.

We know that the Standard Distribution is symmetrical. Most of the tables give us only positive values for z. But, because of the symmetry of this distribution, z = 0.3389 is the distance of this value from the mean of the population. The F(z) for this value is 0.6331 (actually, the value for z = 0.34 in a Table of the Normal Distribution).

This value is 0.6331-0.5000=0.1331 (13.31%) above the mean. But, because of the symmetry of the Normal Distribution, z = -0.34, the value F(z) = 0.5000-0.1331=0.3669. That is, for z = -0.34, the value for F(z) = 36.69%.

Well, what percentage of compounds have an amount of collagen greater than 67 grams per milliliter?

Those values greater that 67 grams per milliliter is 1 - 0.3669 = 0.6331 or 63.31%.

What percentage of compounds have an amount of collagen less than 78 grams per milliliter?

In this case,

z = [tex]\frac{78-69}{5.9} = 1.5254[/tex].

For this z-score, the value F(z) = 0.9357 or 93.57%. That is, below 78 grams per milliliter, the percentage of compounds that have an amount of collagen is 93.57%.

What exact percentage of compounds formed from the extract of this plant fall within 3 standard deviations of the mean?

We need here to take into account three standard deviations below the mean and three standard deviations above the mean. All the values between these two values are the exact percentage of compounds formed from the extract of this plant.

From the Table:

For z = 3, F(3) = 0.9987.

For z = -3, F(-3) = 1 - 0.9987 = 0.0013.

Then, the exact percentage of compounds formed from the extract of this plant fall within 3 standard deviations of the mean is:

F(3) - F(-3) = 0.9987 - 0.0013 = 0.9974 or 99.74%.

A z-score is used to determine how many standard deviations a value is from the mean. A score of 720 on the SAT is 1.74 standard deviations above the mean, whereas a score of 692.5 is 1.5 standard deviations above the mean. To compare scores from different tests, like the SAT and ACT, you compute the z-scores for each and compare them.

In statistics and probability theory, when comparing values from different normal distributions, one useful tool is the z-score. It informs us of how many standard deviations an element is from the mean of its distribution. A z-score is calculated using the formula Z = (X - μ) / σ, where X is the value in question, μ is the mean, and σ is the standard deviation.

To calculate a z-score for an SAT score of 720 when the mean is 520 and the standard deviation is 115:
Z = (720 - 520) / 115 = 200 / 115 ≈ 1.74.

This z-score of approximately 1.74 implies that the score of 720 is 1.74 standard deviations above the mean SAT score.

To find an SAT score that is 1.5 standard deviations above the mean:
X = μ + 1.5σ = 520 + 1.5 × 115 = 520 + 172.5 = 692.5.

So, a score of approximately 692.5 is 1.5 standard deviations above the mean, indicating a well-above-average performance.

Comparing an SAT math score of 700 and an ACT score of 30 with respect to their respective mean and standard deviation:

Based on their z-scores, the individual with the ACT score performed slightly better relative to others who took the same test than the individual who took the SAT math test.

Answer:

[tex]\frac{7}{32}[/tex] inch.

Step-by-step explanation:

We have been given that the depth of the new tire is 9/32 inch after two month use 1/16 inch worn off. We are asked to find the depth of the tire remaining tire thread.

To find the depth of remaining tire thread, we will subtract worn off value from initial depth as:

[tex]\text{Depth of remaining tire thread}=\frac{9}{32}-\frac{1}{16}[/tex]

Let us make a common denominator.

[tex]\text{Depth of remaining tire thread}=\frac{9}{32}-\frac{1*2}{16*2}[/tex]

[tex]\text{Depth of remaining tire thread}=\frac{9}{32}-\frac{2}{32}[/tex]

Combine numerators:

[tex]\text{Depth of remaining tire thread}=\frac{9-2}{32}[/tex]

[tex]\text{Depth of remaining tire thread}=\frac{7}{32}[/tex]

Therefore, the depth of the remaining tire thread would be [tex]\frac{7}{32}[/tex] inch.

The remaining depth of the tire is 7/32 inches.

To determine the remaining depth of the tire tread, you need to subtract the depth worn off from the initial depth of the tire.

Step-by-Step Solution:

This approach ensures you correctly determine the remaining depth of the tire tread.

Answer:

3.8 [tex]in^{2}[/tex]

Step-by-step explanation:

We are given a square of size 6x6 in. So, area of this square is equal to 6 x 6 = 36 [tex]in^{2}[/tex]. Now, the shaded region is [tex]\frac{1}{2}[/tex] x (Area of square - area of semicircles)

The diameter of both semicircles = side of the square = 6in

So, radius (r) = [tex]\frac{1}{2}[/tex] x diameter = [tex]\frac{1}{2}[/tex] x 6 = 3in

And hence, area of semicircle is  = [tex]\frac{1}{2}[/tex] x π[tex]r^{2}[/tex]

= [tex]\frac{1}{2}[/tex] x π[tex]3^{2}[/tex]

Since, there are two semicircles we multiply above by 2, so area of both semicircles = 2 x [tex]\frac{1}{2}[/tex] π[tex]3^{2}[/tex] = 9π

Area of shaded region =  [tex]\frac{1}{2}[/tex] (36 - 9π) = 3.8628 = 3.8 [tex]in^{2}[/tex] to the nearest tenth.

Answer:

The number of child tickets sold was 36

Step-by-step explanation:

The complete question is

At the city museum, child admission is $5.80 and adult admission is $9.30. On Monday, four times as many adult tickets as child tickets were sold, for a total sales of $1548.00. How many child tickets were sold that day?

Let

x ----> the number of child tickets sold

y ----> the number of adult tickets sold

we know that

[tex]5.80x+9.30y=1,548.00[/tex] ---> equation A

[tex]y=4x[/tex] ----> equation B

Solve by substitution

Substitute equation B in equation A    

[tex]5.80x+9.30(4x)=1,548.00[/tex]

solve for x

[tex]5.80x+37.2x=1,548.00[/tex]

[tex]43x=1,548.00[/tex]

[tex]x=36[/tex]

therefore

The number of child tickets sold was 36

Answer: second option.

Step-by-step explanation:

In order to solve this exercise, it is necessary to remember the following properties of logarithms:

[tex]1)\ ln(p)^m=m*ln(p)\\\\2)\ ln(e)=1[/tex]

In this case you have the following inequality:

[tex]e^x>14[/tex]

So you need to solve for the variable "x".

The steps to do it are below:

1. You need to apply [tex]ln[/tex] to both sides of the inequality:

[tex]ln(e)^x>ln(14)[/tex]

2. Now you must apply the properties shown before:

[tex](x)ln(e)>ln(14)\\\\(x)(1)>2.63906\\\\x>2.63906[/tex]

3. Then, rounding to the nearest ten-thousandth, you get:

[tex]x>2.6391[/tex]

Answer:

C. 0.006

Step-by-step explanation:

Here we have to calculate the probability of two events happen at once, so the probability is the product of the probability of having a 2 and the probability of having a 10.

There are four 2 cards out of 52 in the poker game, so the probability of having a 2 is:

[tex]P(2)=\frac{4}{52}=0.077[/tex]

Now the probability of having a 10 is 4 out of 51 because we substracted the card labeled as 2.

[tex]P(10)=\frac{4}{51}=0.079[/tex]

so the probability is:

[tex]P(P(2)andP(10))=0.077*0.079=0.006[/tex]

Answer:the greatest number of pieces that can be cut is 2

Step-by-step explanation:

The total length of ribbon available is 3/4 meter. Sunday needs pieces measuring 1/3 meter for their project. This means that each length needed would be exactly 1/3 meter.

The number of pieces measuring 1/3 meter that can be cut from the ribbon would be

(3/4)/(1/3) = 3/4×3/1 = 9/4 = 2.25

Since the length needed is exactly 1/3 meter, the greatest number of pieces that can be cut will be 2

Answer:

Fourth degree polynomial (aka: quartic)

====================================================

Work Shown:

There isnt much work to show here because we can use the fundamental theorem of algebra. The fundamental theorem of algebra states that the number of roots is directly equal to the degree. So if we have 4 roots, then the degree is 4. This is assuming that there are no complex or imaginary roots.

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

If you want to show more work, then you would effectively expand out the polynomial

(x-m)(x-n)(x-p)(x-q)

where

m = 4, n = 2, p = sqrt(2), q = -sqrt(2)

are the four roots in question

(x-m)(x-n)(x-p)(x-q)

(x-4)(x-2)(x-sqrt(2))(x-(-sqrt(2)))

(x-4)(x-2)(x-sqrt(2))(x+sqrt(2))

(x^2-6x+8)(x^2 - 2)

(x^2-2)(x^2-6x+8)

x^2(x^2-6x+8) - 2(x^2-6x+8)

x^4-6x^3+8x^2 - 2x^2 + 12x - 16

x^4 - 6x^3 + 6x^2 + 12x - 16

We end up with a 4th degree polynomial since the largest exponent is 4.

The equation of parabola is expressed as: y² = -20x

What is the equation of the parabola?

A parabola refers to an equation of a curve, such that a point on the curve is equidistant from a fixed point, and a fixed line.

The fixed point is called the focus of the parabola, and the fixed line is called the directrix of the parabola.

Given, vertex = (0, 0)

Focus = (-5, 0)

We have to find the equation of the parabola.

The equation is of the form y = -ax²

Directrix x = 5.

As every point on parabola is equidistant from focus and directrix, the equation will be

y² + (x + 5)² = (x - 5)²

y² + x² + 10x + 25 = x² - 10x + 25

y² = - 10x - 10x

y² = -20x

Therefore, the equation of parabola is y² = -20x

Answer:

The sample space for one spin of this game is: S = {00, 0, 1, 2, 3,…, 40}

Step-by-step explanation:

Consider the provided information.

In probability theory, the set of all possible outcomes or outcomes of that experiment is the sample space of an experiment or random trial. Using set notation, a sample space is usually denoted and the possible ordered outcomes are identified as elements in the set.

Here the possible number of elements in the set are 00, 0, 1, 2,...,40

The sample space is anything the ball can land on.

Thus, the sample space for one spin of this game is: S = {00, 0, 1, 2, 3,…, 40}

Answer:

he rank from least to great based on their axis of symmetry:

0, 1, -3 ⇒ g(x), h(x), f(x)

So, option C is correct.

Step-by-step explanation:

A quadratic equation is given by:

[tex]ax^2+bx+c =0[/tex]

Here, a, b and c are termed as coefficients and x being the variable.

Axis of symmetry can be obtained using the formula

[tex]x = \frac{-b}{2a}[/tex]

Identification of a, b and c in f(x), g(x) and h(x) can be obtained as follows:

[tex]f(x) = x^2 + 6x - 1[/tex]

⇒ a = 1, b = 6 and c = -1

[tex]g(x) = -x^2 + 2[/tex]

⇒ a = -1, b = 0 and c = 2

[tex]h(x) = 2^2 - 4x + 3[/tex]

⇒ a = 2, b = -4 and c = 3

So, axis of symmetry in [tex]f(x) = x^2 + 6x - 1[/tex] will be:

[tex]x = \frac{-b}{2a}[/tex]

x = -6/2(1) = -3

and axis of symmetry in [tex]g(x) = -x^2 + 2[/tex] will be:

[tex]x = \frac{-b}{2a}[/tex]

x = -(0)/2(-1) = 0

and axis of symmetry in [tex]h(x) = 2^2 - 4x + 3[/tex] will be:

[tex]x = \frac{-b}{2a}[/tex]

x = -(-4)/2(2) = 1

So, the rank from least to great based on their axis of symmetry:

0, 1, -3 ⇒ g(x), h(x), f(x)

So, option C is correct.

Keywords: axis of symmetry, functions

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Answer:

8,855

Step-by-step explanation:

The way to solve this problem is by using Combinations.

In Combinations, we can form different collections of k elements from a total of n elements where the order of them does not matter and any member of them is not repeated.

Combinations is expressed mathematically as:

[tex]\\nC_k = \frac{n!}{(n-k)!k!} [/tex] [1]

Where n is the total elements, k is the number of elements selected from n, and n! is n factorial, or, for instance, 3! is 3*2*1 = 6; 4! is 4*3*2*1 = 24.

This formula tells us how to form groups of k members from a total of n elements. These groups of k members have no repeated elements, that is, in the context of this question, no flavor is repeated in any group.

Likewise, different orders of the same members do not matter, or, in other words, if we have two groups of four members flavors (vanilla, chocolate, strawberry, lemon) and (chocolate, vanilla, lemon, strawberry), they are considered the same group since order does not matter in Combinations.

In this way, to determine the number of four dip sundaes (k) from 23 flavors (n) that an ice cream store sells, we need to apply the formula [1], as follows:

[tex]\\23C_4 = \frac{23!}{(23-4)!4!} [/tex]

[tex]\\23C_4 = \frac{23!}{19!4!} [/tex]

[tex]\\23C_4 = \frac{23*22*21*20*19!}{19!4!} [/tex], since 19!/19! = 1.

[tex]\\23C_4 = \frac{23*22*21*20}{4*3*2*1} [/tex]

[tex]\\23C_4 = 8,855 [/tex]

To find the number of 4-dip sundaes possible with 23 flavors of ice cream, we use combinations. The formula for combinations is C(n, r) = n! / (r!(n-r)!). Applying this formula, we find that there are 8855 possible 4-dip sundaes.

To determine the number of 4-dip sundaes possible with 23 flavors of ice cream, we can use combinations.

A combination is used when the order does not matter, and no repetitions are allowed.

In this case, we use the formula for combinations of r items selected from a set of n items without replacement: C(n, r) = n! / (r!(n-r)!)

So, the number of 4-dip sundaes possible is C(23, 4) = 23! / (4!(23-4)!) = 23! / (4!19!)

Calculating this using a calculator, we find that there are 8855 possible 4-dip sundaes with 23 flavors of ice cream.

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y coordinate of midpoint of line AB is 6

Solution:

Given that endpoints of line AB is (10, 14) and (4, -2)

To find:  y-coordinate of the midpoint of line AB

The midpoint of line AB is given as:

For a containing [tex]A(x_1, y_1)[/tex] and [tex]B(x_2, y_2)[/tex] the midpoint is given as:

[tex]M(x, y)=\left(\frac{x_{1}+x_{2}}{2}, \frac{y_{1}+y_{2}}{2}\right)[/tex]

Here in this question,

[tex]\left(x_{1}, y_{1}\right)=(10,14) \text { and }\left(x_{2}, y_{2}\right)=(4,-2)[/tex]

So midpoint is:

[tex]\begin{aligned}&M(x, y)=\left(\frac{10+4}{2}, \frac{14-2}{2}\right)\\\\&M(x, y)=\left(\frac{14}{2}, \frac{12}{2}\right)\\\\&M(x, y)=(7,6)\end{aligned}[/tex]

Therefore y coordinate of midpoint of line AB is 6

To evaluate the expression 2(4 - 1)^2, multiply 2 by the square of the result of subtracting 1 from 4, resulting in 18.

To evaluate the expression 2(4 - 1)^2, we need to follow the order of operations, also known as PEMDAS. First, we evaluate the expression within the parentheses: 4 - 1 = 3. This gives us 2(3)^2. Next, we calculate the exponential expression: 3^2 = 9. Finally, we multiply 2 by 9, which gives us the final result of 18.

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Answer:

Step-by-step explanation:

k = 6

To find the value of k, rationalize the denominator of 2/√3, and compare it with 2k/3 to find k = √3.

To rationalize the denominator of the fraction 2/√3, we need to make the denominator a rational number. We can do this by multiplying both the numerator and the denominator by √3.

So, after rationalizing, the fraction becomes 2√3/3. According to the problem statement, this is equivalent to 2k/3.

Therefore, we can equate 2k to 2√3:

2k = 2√3

k = √3

So, the value of k is √3.

The complete question is

When the denominator of 2/√3 is rationalized ,it becomes 2k/3​. Find k

Answer:the number of miles that Henry traveled is 15

Step-by-step explanation:

Let m represent the number of miles travelled.

City Cab charges a flat fee of $3 plus 0.50 per mile. This means that the total amount that city Cab charges for m miles would be

3 + 0.5m

Henry paid $10.50 for a cab ride across town.

The equation representing Henry's cab ride would be

3 + 0.50m = 10.50

Subtracting 3 from both sides of the equation, it becomes

3 - 3 + 0.50m = 10.50 - 3

0.5m = 7.5

m = 7.5/0.5 = 15 miles

Answer:

the correct option is D.

Step-by-step explanation:

x+3y>6

y≥2x+4

consider the equation x+3y=6

3y = 6-x

[tex]y=\frac{-x}{3} +2[/tex]

this line is in the form of y = mx + c

where m is the slope os the line and c is the y intercept of the line

therefore the line has a y intercept of 2  and slope of-1/3

therefore the line has negative slope with positive intercept.

now consider the line y=2x+4

this line is in the form of y = mx + c

where m is the slope os the line and c is the y intercept of the line

therefore slope = 2 and y intercept = 4

therefore the line has positive slope and positive y intercept.

in option a both line has positive intercept so it cant be an answer.

in option b one line has positive intercept of 2 and another with negative intercept of -4 but we need intercept of both line to be positive so it cant be an answer.

in option c both line has negative intercept of -2 and -4 but we need intercept of both line to be positive so it cant be an answer.

in option d both line has positive intercept of 2 and 4 and also one of the line has negative slope and another line has positive slope so it should be an answer

further to confirm consider x+3y>6

put the point 0,0 in the inequality

0>6 which is wrong so 0,0 cant lie in the region which is true according to the graph.

Answer:

d

Step-by-step explanation:

Answer:

Base of triangle is 9 inches and altitude of triangle is 14 inches.

Step-by-step explanation:

Given:

Area of Triangle = 63 sq. in.

Let base of the triangle be 'b'.

Let altitude of triangle be 'a'.

Now according to question;

altitude is 5 inches longer than the base.

hence equation can be framed as;

[tex]a=b+5[/tex]

Now we know that Area of triangle is half times base and altitude.

Hence we get;

[tex]\frac{1}{2} \times b \times a =\textrm{Area of Triangle}[/tex]

Substituting the values we get;

[tex]\frac{1}{2} \times b \times (b+5) =63\\\\b(b+5)=63\times2\\\\b^2+5b=126\\\\b^2+5b-126=0[/tex]

Now finding the roots for given equation we get;

[tex]b^2+14b-9b-126=0\\\\b(b+14)-9(b+14)=0\\\\(b+14)(b-9)=0[/tex]

Hence there are 2 values of b[tex]b-9 = 0\\b=9\\\\b+14=0\\b=-14[/tex]

Since base of triangle cannot be negative hence we can say [tex]b=9\ inches[/tex]

So Base of triangle = 9 inches.

Altitude = 5 + base  = 5 + 9 = 14 in.

Hence Base of triangle is 9 inches and altitude of triangle is 14 inches.

Answer:

No, the student is not right as his statement is against central limit theorem.

Step-by-step explanation:

Central Limit Theorem:

This theorem states that if we take large samples of a population which has a mean and standard deviation then mean samples will have a normal distribution.