help please i dont understand

Answer:

11.390625 in^3

Step-by-step explanation:

2.25^3 = 11.390625 in^3

The scale factor of the dilation, expressed in function notation, (x, y) → (k·x, k·y), is (x, y) → (0.5·x, 0.5·y)

A dilation transformation is a transformation in which the dimensions of the image are obtained by multiplying the dimensions of the pre-image by a value, known as a scale factor of the dilation.

The possible table, based on the similarities of the coordinate points can be presented as follows;

Pre-Image [tex]{}[/tex]    Image

(2, 4) [tex]{}[/tex]             (1, 2)

(1, 0)  [tex]{}[/tex]            (0.5, 0)

(-4, -1) [tex]{}[/tex]           (-2, -0.5

The specified formula for the image, following the dilation of the point (x, y) by a scale factor of k is; (x, y) → (k·x, k·y)

Therefore, we get;

k = k·x/x = k·y/y

The comparison of the points in the table with the points (x, y), and (k·x, k·y), indicates that we get;

When (x, y) = (2, 4) and (k·x, k·y) = (1, 2)

Therefore;

k = k·x/x = k·y/y = 1/2 = 2/4  = 0.5

The scale factor of the dilation , k = 0.5, therefore;

(x, y) → (0.5·x, 0.5·y)

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If the matrix xt x is not invertible, then its determinant is equal to 0. A determinant of 0 implies that the matrix is singular, meaning that its columns are linearly dependent.

This means that one of the columns of x can be expressed as a linear combination of the other columns, which implies that there is only one way in which the invertibility problem may arise: when the columns of the matrix x are linearly dependent.

If the determinant of xt x is equal to 0, then at least one column of x can be expressed as a linear combination of the others. For example, if column c can be expressed as a linear combination of columns a and b, then we can write:

c = k1a + k2b

where k1 and k2 are constants. This means that the information in column c is already represented in columns a and b, and so it is redundant.

This is the only way in which the invertibility problem of xt x may arise. If the columns of the matrix are linearly independent, then the determinant of xt x will be non-zero, and the matrix will be invertible.

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Your question is incomplete, but most probably, the full question was:

Proof that [tex]X^{T} X[/tex] is not invertiblethen at least one column of x is a linear combination of the others. This implies that there is only one way in which a problem with the invertibility of xt x may arise

The equation that represents the cost of the skirt will be 3/4(18 + s) = 31.50. Then the correct option is D.

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.

Let 's' be the cost of the skirt. Then the equation is given as,

3/4(18 + s) = 31.50

The equation that represents the cost of the skirt will be 3/4(18 + s) = 31.50. Then the correct option is D.

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Answer:

Step-by-step explanation:

customers: 6

minutes: 40

The answer is B. diverges.

Theorem 9.11 states that if the sequence of positive terms (an) satisfies the condition 1/an^p converges, then the p-series ∑an converges if p > 1 and diverges if p ≤ 1. In this case, the positive terms of the sequence are given by [1/(n^(3/2))]. So, [1/an^p] = [1/(n^(3/2))^p] = [1/n^(3p/2)].

For the series to converge, we need [1/an^p] to converge, or [1/n^(3p/2)] to converge.

If 3p/2 > 1, then [1/n^(3p/2)] converges and the series converges.

If 3p/2 ≤ 1, then [1/n^(3p/2)] diverges and the series diverges.

So, to determine the value of p, we need to find the value of p such that 3p/2 = 1. Solving for p, we find that p = 2/3.

Since 2/3 ≤ 1, the series diverges. Therefore, the answer is B. diverges.

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The probability of selecting two different coloured chips is the fraction 14/49.

Probability is the fraction of the required outcome event divided by the number of possible outcomes of events.

total possible outcome = 7

blue chips = 4

red chips = 2

white chips = 1

probability of selecting blue chips = 4/7

probability of selecting red chips = 2/7

probability of selecting white chips = 1/7

probability of selecting two coloured chips at random = 4/7 × 2/7 + 4/7 × 1/7 + 2/7 × 1/7

probability of selecting two coloured chips at random = 8/49 + 4/49 + 2/49

probability of selecting two coloured chips at random = 14/49

Therefore, the probability of selecting two different coloured chips is the fraction 14/49

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The total trip took a total of 1.87 hours.

Speed is the rate at which an object's position changes, measured in meters per second. For example, if an object starts at the origin, and then moves three meters in three seconds, its speed is one meter per second. The equation for speed is simple: distance divided by time

Given here: Total distance=120 km and 59 km at 90 km/hr and the remaining distance at 50 km/hr

Remaining distance= 120-59

                                 =61 km

Thus for the first 59 km the time it took was

Time= Distance/ Speed

       = 59/90

       =0.65 hr

Similarly time taken for the second part of the journey is = 61/50

                                                                                               =1.22

Hence, total time taken for the trip is 1.22+0.65=1.87 hr.

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Answer:

2 days

Step-by-step explanation:

We want to divide 1 1/2 by 3/4

1 1/2 ÷ 3/4

Change the mixed number into an improper fraction.

3/2 ÷ 3/4

Copy dot flip

3/2 * 4/3

Rewrite

3/3 * 4/2

1 * 2

2

It will last 2 days

The solution to the system of equations in this problem is given as follows:

X = [28571

      14286].

The system is defined by the following equation:

X = DX + E.

The matrices D and E are known, while X = [A; B] is the output matrix. Applying the multiplication of matrices, the system of equations is defined as follows:

Inserting this system into a calculator, the solution is given as follows:

Hence the matrix X is given as follows:

X = [28571

      14286].

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Gina should buy from Stickers4u.

Multiplication is a mathematical arithmetic operation. It is also a process of adding the same types of expression for some number of times.

Example - 2 × 3 means 2 is added three times, or 3 is added 2 times.

Given:

Gina is going to buy 100 stickers.

If she buys from the shop - Stickers4u,

then the cost is,

= 100/25 x 2.15

= 4 x 2.15

= 8.6.

And if she buys from the World stationary,

then the cost is,

= (100 - 50)/10 x 1.65

= 5 x 1.65

= 8.25

Therefore, she should buy from Stickers4u.

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The value of h can be any value other than 2.

The augmented matrix of a consistent linear system must have a unique solution, which means the determinant of the coefficient matrix must be non-zero.

       [1 h

        3 6]

The determinant of this matrix is (1 * 6) - (3 * h) = 6 - 3h.

For the determinant to be non-zero and the system to be consistent, 6 - 3h must not be equal to zero, so h cannot be equal to 2.

Therefore, the value of h can be any value other than 2.

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Answer:

YXZ=AXZ

because if you see the letters they form triangle

Answer:

132

Step-by-step explanation:

180 - 48 = 132   These angles are supplemental.  They add to 180

Answer:

<GAE = 48

Step-by-step explanation:

<BAC = 48

<BAC = <GAE

Answer:

If order is considered = 6

If order is not considered = 3

Step-by-step explanation:

If order is to be taken in consideration then the following values can be taken:

a, b

a, c

b, a

b, c

c, a

c, b

Total = 6 ways

If order is not taken in consideration then the following values can be taken:

a, b

a, c

b, c

Total = 3 ways

Answer:

1 + 2/7

Step-by-step explanation:

9/7 =

(7+2) / 7 =

7/7 + 2/7 =  ==> use distribution

1 + 2/7  ==> 7/7 = 1, so simplify the expression

Answer: PQ is 9 units.

Step-by-step explanation:

The length of PQ can be found using the proportion of OQ and OP.

(PQ / OQ) = (OP / OQ)

PQ = (OP / OQ) * OQ

Substituting in the given values:

PQ = (9 / 11) * 11

PQ = 9

Therefore, the length of PQ is 9 units.

The half-distance left is 40/7 or 5.714 miles

Given that:

The total race is 16 miles long.

Kim walked for 2/6 of the race, which is (2/6) * 16 = 16/3 miles.

After walking 16/3 miles, there are 16 - 16/3 = 32/3 miles left in the race.

Kim then sprints for 3/7 of the remaining distance, which is (3/7) * 32/3 = 32/7 miles.

Half of the race is left after she finished sprinting and walking, which is

16 - 32/7 = 80/7 miles

Divide this by 2:

80/7 ÷2

= 40/7 miles are left.

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The probability that the maximum of the two dice is greater than or equal to six is 0.722.

What is probability?

Probability is a way of calculating how likely something is to happen. Probability can range from 0 to 1, with 0 indicating an impossibility and 1 indicating a certainty.

We are given that two six-sided dice numbered from one through six are rolled.

The sample space of the event is

(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6)

(2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6)

(3, 1), (3, 2), (3, 3), (3, 4), (3, 5), (3, 6)

(4, 1), (4, 2), (4, 3), (4, 4), (4, 5), (4, 6)

(5, 1), (5, 2), (5, 3), (5, 4), (5, 5), (5, 6)

(6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6)

Probability that the maximum of the two dice is greater than or equal to six is

26 out of 36 i.e. 26/36

This is equal to 0.722.

Hence, the probability that the maximum of the two dice is greater than or equal to six is 0.722.

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Answer:

Step-by-step explanation:

4x+3x=6+2

7x/7=8/7

=1.143

Answer: X=22

According to equation given :-

4x-2=3x+6 ----------------------(1)

4x - 2 +3x+6=180 -------------(2)

hence put equation (1) in (2) which that

4x - 2 +4x-2=180

2* ( 4x-2 ) = 180

4x-2 =90

4x = 88

x= 22 (answer)

Answer: n=110, m=110

Step-by-step explanation: I think m=110 because of vertical angles. m might also equal 70.

The length of the GH is 4, when H is the midpoint of GI.

An area of a line that connects two distinct locations is referred to as a line segment. It is the least path between two places that can be determined to have a length.

A line segment's midpoint is the point on the segment when it is divided into two similar segments. The point on a line segment that is equally spaced from the two terminating points is known as the midpoint of the segment.

Given that H is the midpoint of GI.

Then we can say that,

GI / 2 = GH

Substitute the equations of the length of GH and GI as given:

(9x - 19) / 2 = 3x - 5

9x - 19 = 2(3x - 5)

9x - 19 = 6x - 10

9x - 6x = -10 + 19

3x = 9

x = 3

Substitute the value of x in the equation of the length of the segment GH thus:

GH = 3x - 5

GH = (3)(3) - 5

GH = 4

Hence, the length of the GH is 4, when H is the midpoint of GI.

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if Monique wanted to run 7/8 mile and she went to the school track which was one quarter of a mile long. The number of lap Monique will complete is

One complete lap around a track or across a pool, from one end to the other: The track has 400 meters or approximately 25 mile per lap.

A lap is end to end of a track and in the problem a lap is 1/4 mile and Monique wants to complete 7/8 miles'. the comparison is as follows

assuming the number of laps is L

1 lap = 1/4 mile

L laps = 7/8 miles

cross multiplying

1 * 7/8 = L * 1/4

multiplying by 4 for each side

1 * 7/8 * 4 = L * 1/4 * 4

1 * 7/8 * 4 = L * 1

7/8 * 4 = L

hence option C is correct

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From the graph, the compound inequality represented is x < -2 and x > 5

An equation is an expression that shows the relationship between two or more numbers and variables.

Inequalities shows the non equal comparison of two or more numbers and variables. Compound inequality is an inequality that is composed of more than one inequality.

From the graph, the inequality is not a solid circle, so it is either > or < sign.

From the graph, the inequality shown is x < -2 and x > 5

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Part a: Amy's net amount in a year from her day job is found as $40411.

Part b: Amy under spend this year by amount $8331.

Part a:

The calculation is done bi- weekly.

Total days = 2*7 = 14.

Net amount = $1550.

Net amount for the year = (1550/ 14)*365

Net amount for the year = $40411

Thus, Amy's net in a year from her day job is found as $40411.

Part b:

Total amount spend : Sum of all expenditures.

Total amount spend : $32,080

Difference =  $40,411 - $32,080

Difference =  $8331

Thus, based on her net income as well as annual expenditures summary,

Amy under spend this year by amount $8331.

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Answer: 0.08 dollars

Step-by-step explanation:

8.64 divided by 9 = 0.96

0.96 divided by 12 = 0.08

The approximate probability P that the total weight of the passengers exceeds 4500 pounds is 10.03%.

Probability is a measure of the likelihood of an event to occur. Many events cannot be predicted with total certainty. We can predict only the chance of an event to occur i.e., how likely they are going to happen, using it. Probability can range from 0 to 1, where 0 means the event to be an impossible one and 1 indicates a certain event.

The probability formula is defined as the possibility of an event to happen is equal to the ratio of the number of favorable outcomes and the total number of outcomes.

Probability of event to happen P(E) = Number of favorable outcomes/Total Number of outcomes

Total of 22 is more than 4500 is equivalent to average of 22 is more than [tex]$\frac{4500}{22}[/tex]=204.545

[tex]$$\begin{aligned}P(\bar{x} > 204.545) & =1-P(\bar{x} < 204.545) \\& =1-P\left(\frac{\bar{x}-\mu}{\sigma / \sqrt{u}} < \frac{204.545-195}{35 / \sqrt{22}}\right) \\& =1-P(z < 1.2792) \\\end{aligned}$$[/tex]

                        = 1 - 0.8997

                        = 0.1003

                        = 10.03%

Therefore, the approximate probability P that the total weight of the passengers exceeds 4500 pounds is 10.03%.

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