Square A has an area of 18a2 + 862 – 24ab.
Square B has an area of (3a – 2b)2
Determine which square has a greater area? Explain your answer.

Step-by-step explanation:

as the other answer said, if is the commutative property of multiplication (the same as for addition, as multiplication is just a shortcut form of special additions) :

a × b = b × a

you need a solution ? you mean, you need this multiplication done and simplified, right ?

you know that

a/b × c/d = (a×c)/(b×d)

so,

-33/57 × -7/28 = -33/57 × -7/(4×7) =

= -33/57 × -1/4 = (-33×-1)/(57×4) =

= 33/228

a Probability that Upper X 0.0013 ,

b. Upper X less than 80 is 0.0228

c  Upper X less than 95 or Upper X greater than 125 is 0.6853.

d 99% of the values are between 76.7 and 123.3 (symmetrically distributed around the mean).

Given a normal distribution with mu equals 100 and sigma equals 10, we can use the cumulative standardized normal distribution table to complete the following parts:

a. What is the probability that Upper X greater than 70?
Using the cumulative standardized normal distribution table, we find the z-score for 70 as (70-100)/10 = -3. We then look up the probability for a z-score of -3, which is 0.0013. Therefore, the probability that Upper X greater than 70 is 0.0013. (Round to four decimal places as needed.)

b. What is the probability that Upper X less than 80?
Using the cumulative standardized normal distribution table, we find the z-score for 80 as (80-100)/10 = -2. We then look up the probability for a z-score of -2, which is 0.0228. Therefore, the probability that Upper X less than 80 is 0.0228. (Round to four decimal places as needed.)

c. What is the probability that Upper X less than 95 or Upper X greater than 125?
Using the cumulative standardized normal distribution table, we find the z-score for 95 as (95-100)/10 = -0.5 and the z-score for 125 as (125-100)/10 = 2.5. We then find the probabilities for each of these z-scores, which are 0.3085 and 0.0062, respectively. To find the probability that Upper X is either less than 95 or greater than 125, we add these two probabilities and subtract from 1 (to account for the overlap): 1 - (0.3085 + 0.0062) = 0.6853. Therefore, the probability that Upper X less than 95 or Upper X greater than 125 is 0.6853. (Round to four decimal places as needed.)

d. 99% of the values are between what two X-values (symmetrically distributed around the mean)?
To find the z-score corresponding to the 99th percentile, we look up the probability of 0.99 in the cumulative standardized normal distribution table, which is 2.33 (rounded to two decimal places). Using this z-score, we can find the corresponding X-values using the formula z = (X - mu)/sigma. Solving for X, we get: X = z*sigma + mu = (2.33)(10) + 100 = 123.3 and X = (-2.33)(10) + 100 = 76.7. Therefore, 99% of the values are between 76.7 and 123.3 (symmetrically distributed around the mean).

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The triangle ΔBAD is congruent to the triangle ΔCDA by SSS postulates.

The polygonal shape of a triangle has a number of sides and three independent variables. Angles in the triangle add up to 180°.

The ratio of the matching sides will remain constant if two triangles are comparable to one another.

If the corresponding sides of the triangles are equal. Then the triangles will be a congruent triangles. And it is known as SSS postulates.

BD = AC and AB = CD

In triangles ΔBAD and ΔCDA, we have

BD = AC             (Given)

AB = CD             (Given)

AD = AD             (Common side)

Then the triangle ΔBAD is compatible with the triangle ΔCDA by SSS proposes.

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Answer:

17 calories

Step-by-step explanation:

Answer:

The scale factor is 3 and Divide by 24 to find b's length.

Step-by-step explanation:

I think this is the answer

(Im just a bored high schooler searching this up) :P

Answer:

it’s The first and the last

Step-by-step explanation:

The rate of change of the function that has a graph that passes

through the points (-1, 3) and (-2,-4) is slope and is equal to 7.

We have given two points  (-1, 3) and (-2,-4) .

Rate of change of graph is given by slope

Using slope formula , we get

      m = -4 - 3 / -2 - (-1)

      m = -7 / -2 + 1

      m = -7 / -1

       m = 7

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Answer:

n6666667900087474455

The values of x and y are y = 27 and x = 18 & x = 3 and y = 12

The triangles are similar by SAS and SSS

Given that the triangles are similar

So, we have

12/y = 4/9 and x/12 = 6/4

When evaluated, we have

4y = 12 * 9 and 4x = 12 * 6

Divide both sides by the coefficients of x and y

So, we have

y = 27 and x = 18

For the similar trapezoid, we have

(2x + 1)/3 = (4x + 9)/9 and 3/4 = 9/y

So, we have

6x + 3 = 4x + 9 and 3y = 4 * 9

Evaluate

2x = 6 and 3y = 36

So, we have

x = 3 and y = 12

For the first pair of triangles, the triangles are similar by SAS because of the following corresponding sides and angles

For the second pair of triangles, the triangles are similar by SSS because  the corresponding sides have the same scale factor of 1.5

i.e. RP/NM = 3/2 = 1.5, PN/LM = 6/4 = 1.5 and RN/LN = 9/6 = 1.5

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The length of segment GF in the triangle is 8 inches

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

The triangle

On the triangle, we have the following ratio

3 : 6 = 4 : GF

So, we have

GF = 6/3 * 4

Evaluate

GF = 8 inches

Hence, the length is 8 inches

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To find all relative  extrema of the function f(x) = cos(x) - 8x on the interval [0, 4], we'll use the second derivative test where applicable.

Step 1: Find the first derivative of the function.
f'(x) = -sin(x) - 8

Step 2: Set the first derivative equal to zero to find critical points.
0 = -sin(x) - 8

Step 3: Solve for x.
sin(x) = -8 (Since the range of sin(x) is [-1,1], there are no solutions for this equation on the interval [0, 4].)

Step 4: Check endpoints of the interval.
f(0) = cos(0) - 8(0) = 1
f(4) = cos(4) - 8(4) ≈ -31.653

Step 5: Find the second derivative.
f''(x) = -cos(x)

Step 6: Apply the second derivative test.
Since there are no critical points, we don't need to use the second derivative test.

Conclusion: There are no relative extrema within the interval [0, 4] for the function f(x) = cos(x) - 8x. The extrema on the interval are the endpoints, with a maximum value of 1 at x = 0 and a minimum value of approximately -31.653 at x = 4.

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A relative maximum at x ≈ 2.301, a global minimum at x = 4, and no relative minimum.

To find all relative extrema of the function f(x) = cos(x) - 8x in the interval [0, 4], we will use the first and second derivative tests. Here's a step-by-step explanation:

1. Find the first derivative of the function:

f'(x) = -sin(x) - 8.

2. Find the critical points by setting f'(x) equal to 0:

-sin(x) - 8 = 0.

3. Solve for x to find the critical points within the interval [0, 4]. The equation is difficult to solve algebraically, so we can use a numerical method or graphing calculator to approximate the solution. We find one critical point x ≈ 2.301.

4. Find the second derivative of the function:

f''(x) = -cos(x).

5. Evaluate the second derivative at the critical point

x ≈ 2.301: f''(2.301) ≈ -cos(2.301) ≈ -0.74.

6. Since f''(2.301) < 0, the second derivative test tells us that there is a relative maximum at the critical point x ≈ 2.301.

7. Check the endpoints of the interval [0, 4].

For x = 0, f(0) = cos(0) - 8(0) = 1.

For x = 4, f(4) = cos(4) - 8(4) ≈ -31.653.

The relative extrema of the function f(x) = cos(x) - 8x in the interval [0, 4] are as follows:

a relative maximum at x ≈ 2.301,

a global minimum at x = 4,

and no relative minimum.

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Answer:

I am confused can you give more info on the question

Step-by-step explanation:

Answer:

28

Step-by-step explanation:

\( - (7) \times ( - 4) \\ - ( - 28) \\ - \times - = + \\ = 28\)

Answer:

The perimeter is 72 inches

Step-by-step explanation:

L=3W+4

2L+2W=72

2(3W+4)+2W=72

6W+8+2W=72

8W=72-8

8W=64

W=64/8

W=8 ANS. FOR THE WIDTH.

L=3*8+4

L=24+4=28 ANS, FOR THE LENGTH.

PROOF:

2*28+2*8=72

56+16=72

72=72

Answer:

s(3) = 42

Step-by-step explanation:

if t = 3 then...

s(3) = 15 (3^3)      -  Given       now all we need to do is simplify

s(3) = 15 + 27       - add like terms (15 + 27)

s(3) = 42              - the answer :D

Mark brainlesit if this helped!

a) The (9,009, 10,585) range represents the 99% confidence interval for the mean number of steps taken on an average workday for all New York City employees who wear activity trackers. No, we are unable to determine the likelihood of specific values using the confidence interval. Only inferences about the population mean can be drawn from it.

A 99% confidence interval for the mean needs to be calculated.

Since the population standard deviation is unknown, we must infer it from the sample standard deviation in order to get the critical number using a t-students distribution.

Sample Mean(M) = 9,797

Sample Standard Deviation(s) = 2,313.

Sample Size(N) = 61

When σ is unknown, an estimation of σM is made by dividing s by the square root of N:

S = s/√n

S = 2313/√61

S = 2313/7.8102

S = 296.1512

These sample size's degrees of freedom are:

df = n - 1

df = 61 - 1

df = 60

With 61 degrees of freedom and a 99% confidence interval, the t-value is 2.66.

The Margin of Error calculated as:

MOE = t × S

MOE = 2.66 × 296.1512

MOE = 787.7622

The confidence interval's lower and upper bounds are as follows:

Lower Bound = M - MOE

Lower Bound = 9797 - 787.7622

Lower Bound = 9,009.2378

Lower Bound = 9,009(approx)

Upper Bound = M + MOE

Upper Bound = 9797 + 787.7622

Upper Bound = 10,584.7622

Upper Bound = 10,585(approx)

We have a 95% confidence interval between 9,009 and 10,585 steps as the mean number of steps taken on a normal workday for all New York City employees using activity trackers.

b) The value of 8,500 steps is outside the confidence interval, which indicates that it is a high figure for the average number of steps taken by all New Yorkers using activity trackers.

The confidence interval cannot be used to calculate the likelihood of specific values.

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The complete question is:

Activity trackers are electronic devices that people wear to record physical activity. Researchers wanted to estimate the mean number of steps taken on a typical workday for people working in New York City who wear such trackers. A random sample of 61 people working in New York City who wear an activity tracker was selected. The number of steps taken on a typical workday for each person in the sample was recorded. The mean was 9,797 steps and the standard deviation was 2,313 steps.

a. Construct and interpret a 99 percent confidence interval for the mean number of steps taken on a typical workday for all people working in New York City who wear an activity tracker.

b. A wellness director at a company in New York City wants to investigate whether it is unusual for one person working in the city who wears an activity tracker to record approximately 8,500 steps on a typical workday. Is it appropriate to use the confidence interval found in part (a) to conduct the investigation.

Using the given linear function, it is found that the expressions are given by:

It is:

4x - 3y = 12.

To find y in terms of x, we isolate y, hence the expression is given by:

\(3y = 4x - 12\)

\(y = \frac{4x}{3} - 4\)

To find x in terms of y, we isolate x, hence the expression is given by:

\(4x = 12 + 3y\)

\(x = \frac{3y}{4} + 3\)

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Answer:

Step-by-step explanation:

Given data set is 3, 8, 12, 12, 14, 20, 21, 23, 26, 34.

So the stem and leaf set will be,

0 |   3    8

1  |   2    2   4

2 |   0    1    3   6  

3 |   4

Key :

1 | 4 means 14

The first term of the arithmetic sequence is 27.

Arithmetic sequence is a sequence of numbers where the numbers are arranged ion a definite order such that the difference of two consecutive numbers is a constant. This constant of difference is called common difference which is commonly denoted by the letter 'd'.

Given that,

Second term of arithmetic sequence, a₂ = 24

Common difference, d = -3

Now, common difference is the difference of the two consecutive terms.

a₂ - a₁ = d

24 - a₁ = -3

-a₁ = -3 - 24

-a₁ = -27

a₁ = 27

Hence the first term is 27 for the sequence.

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Answer: John walks a total of 360 yards from school.

Step-by-step explanation:

Let's represent the total distance John walks from school as "x".

According to the problem, John has already walked 15% of the way, which can be written as:

0.15x

We also know that he has walked 54 yards so far, which means:

0.15x = 54

To find the total distance John walks from school, we can solve for "x" by dividing both sides of the equation by 0.15:

x = 54 ÷ 0.15

x = 360

Therefore, John walks a total of 360 yards from school.

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If two of the pairwise comparisons following an ANOVA exceed Fisher’s LSD, the number that  would exceed Tukey’s HSD: A) One or none

Compared to Fisher's least significant difference (LSD) test, the Tukey's honestly significant difference (HSD) test is more cautious. Compared to Fisher's LSD test, Tukey's HSD test has a higher significant threshold since it considers the entire error rate and modifies the threshold appropriately.

It is less likely that two pairwise comparisons would surpass Tukey's HSD test's higher significance level if they already surpass Fisher's LSD test, which has a lower significance threshold.

Therefore the correct option is A.

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Leo delivered 62.80 big parcels.

Let's denote the amount Leo earned for delivering a big parcel as "B" and the amount he earned for delivering a small parcel as "S". We'll set up a system of equations based on the given information.

From the problem statement, we have the following information:

1) Leo earned $2.40 for delivering a small parcel: S = 2.40

2) Leo earned more for delivering a big parcel: B > 2.40

3) He delivered 3 times as many small parcels as big parcels: S = 3B

4) Leo earned a total of $170.80: B + S = 170.80

5) Leo earned $45.20 less for delivering all big parcels than all small parcels: S - B = 45.20

Now, let's solve the system of equations:

From equation (3), we can substitute S in terms of B:

3B = 2.40

From equation (5), we can substitute S in terms of B:

S = B + 45.20

Substituting these values for S in equation (4), we get:

B + (B + 45.20) = 170.80

Simplifying the equation:

2B + 45.20 = 170.80

2B = 170.80 - 45.20

2B = 125.60

B = 125.60 / 2

B = 62.80

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Answer: A.) For these data, as the number of at bats increases, the number of hits tend to increase.

This is because the points seem to trend upward as we move from left to right. This makes sense because the more attempts you get, the more hits you're expected to get.

Assume that someone has a batting average of 0.300; this means that if they got 1000 attempts, then we expect about 0.300*1000 = 300 hits. Now if they got 2000 at bats this time, then we expect about 0.300*2000 = 600 hits.

Of course things won't fit this perfectly since everything in life has random statistical error, but this gives a good idea of the upward trending data. The two variables (at bats and hits) are strongly related. We can say the variables have strong positive correlation.

By applying the probability concept, it can be concluded that the proportion of strength observations in this sample exceeding 10 MPa is 0.15.

Probability is a value used to measure the degree of occurrence of a random event.

P(A) = f / N where:

f = frequency of event A

N = number of possible outcomes / sample space

There are 27 strength data for beams (in MPa), which are our sample space:

5.7    7.2    7.3    6.2    8.1     6.8    7.0    7.6    6.8    

6.5    7.0   6.3    7.9    9.0     8.2   8.7     7.8     9.7    

7.4    7.7    9.7    7.8    7.7     11.6   11.5    11.8    10.6

We want to determine the proportion of strength observations in this sample exceeds 10 MPa.

Since there are only 4 samples that exceed 10 MPa, thus the proportion of these 4 samples can be calculated as follows:

P (x>10) = f / N

             = 3 / 27

             = 0.148

             ≈ 0.15

Thus the proportion of strength observations in this sample exceeding 10 MPa is 0.15.

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Answer:

i believe 73 is the answer

For an increase of one hour in time worked, the predicted increase in the amount of money spent on entertainment is 1.86 units.

To find the predicted increase in the amount of money spent on entertainment for an increase of one hour in time worked, we need to find the slope of the line, which is the coefficient of x in the equation.

which means that for every one unit increase in x (which in this case is one hour worked), y (which in this case is the amount of money spent on entertainment) is predicted to increase by 1.86 units.

This is the change in the dependent variable (y) for a unit increase in the independent variable (x), based on the linear relationship described by the equation of the line fit.

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(a)Probability that a person could give up cell phone = 0.48

(b)Probability that a person who could give up her cell phone also could give up television is 0.65

(c) Probability that a person who could not give up a cell phone could give up television is 0.73

What is Probability?

Calculating the likelihood of experiments happening is one of the branches of mathematics known as probability. We can determine everything from the likelihood of receiving heads or tails when tossing a coin to the likelihood of making a research blunder, for instance, using a probability. It is crucial to grasp this branch's most fundamental concepts in order to fully comprehend it, including the formula for computing probabilities in equiprobable sample spaces, the likelihood of two events joining together, the probability of the complementary event, etc.

According to  the given question:

a. Probability that a person could give up cell phone = 0.48

b. Probability that a person who could give up her cell phone also could give up television

= P(give up cell phone and TV)/p(give up cell phone)

= 0.31/0.48

= 0.6458

= 0.65

c. Probability that a person who could not give up a cell phone could give up television is

= P(could not give up cellphone and could give up TV)/P(could not give up cell phone)

= 0.38/0.52

= 0.73

d. The probability a person could give up television is higher for persons who couldn't give up cell phones than for those who could give up their cell phones.

Hence,

(a)Probability that a person could give up cell phone = 0.48

(b)Probability that a person who could give up her cell phone also could give up television is 0.65

(c) Probability that a person who could not give up a cell phone could give up television is 0.73

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The correct probabilities are P(at least two tails) = 0. 5 and P(at least one heads) = 0. 875.

Let's calculate the probabilities based on the given sample space:

Total number of outcomes (sample space) = \(2^{3}\) = 8

P(one tails):

From the sample space, there are four outcomes that have exactly one tails: HTT, THT, TTH, TTT.

So, P(one tails) = 4/8 = 0.5

P(three heads):

From the sample space, there is only one outcome that has three heads: HHH.

So, P(three heads) = 1/8 = 0.125

P(one heads and two tails):

From the sample space, there are three outcomes that have one heads and two tails: HHT, HTH, THH.

So, P(one heads and two tails) = 3/8 = 0.375

P(at least two tails):

From the sample space, there are four outcomes that have at least two tails: TTH, THT, HTT, TTT.

So, P(at least two tails) = 4/8 = 0.5

P(at least one heads):

From the sample space, there are seven outcomes that have at least one heads: HHH, HHT, HTH, THH, THT, TTH, TTT.

So, P(at least one heads) = 7/8 = 0.875

Therefore, the correct probabilities are:

P(one tails) = 0.5

P(three heads) = 0.125

P(one heads and two tails) = 0.375

P(at least two tails) = 0.5

P(at least one heads) = 0.875

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The tickmarks tell us which pairs of sides are the same length.

So far we have two pairs of congruent sides.

The third pair of congruent sides are the overlapping or shared sides BD = BD which is true by the reflexive property (anything is congruent to itself).

Overall we have three pairs of congruent sides allowing us to use SSS. Each "S" stands for "Side".