Please help, basic algebra. Find the value of x

Answer:   \(\left[\begin{array}{ccc}11&13&3\\1&9&17\\15&5&7\end{array}\right]\)

Step-by-step explanation:

A magic cube is something like:

\(\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]\)

Where the numbers that we must use are:

1, 3, 5, 7, 9, 11, 13, 15, 17

If we take the addition of those 9 numbers, we get 81.

Now, we divide it by 3 (the number of numbers in each row or column) and get:

81/3 = 27

so the sum in each row, column and diagonal must be 27.

1 + 9 + 17 = 27

13 + 11 + 3 = 27

5 + 7 + 15 = 27

9 + 13 + 5 = 27

You can keep playing with this, and then start forming our number cube, some of the hints tat we can use is that the median of the group is 9, so it must be in the middle of the cuve, and the extremes, 1 and 17, must be in the same column or row as 9.

so we start with:

\(\left[\begin{array}{ccc}x&x&x\\1&9&17\\x&x&x\end{array}\right]\)

and start to fill the empty spaces, now we can use that

1 + 11 + 15 = 27 and get:

\(\left[\begin{array}{ccc}11&x&x\\1&9&17\\15&x&x\end{array}\right]\)

now for the diagonals:

11 + 9 + 7 = 27

15 + 9 + 3 = 27

\(\left[\begin{array}{ccc}11&x&3\\1&9&17\\15&x&7\end{array}\right]\)

and for the last one:

11 + 3 + 13 = 27

15 + 7 + 5 = 27

\(\left[\begin{array}{ccc}11&13&3\\1&9&17\\15&5&7\end{array}\right]\)

Answer:

huh

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

answer is below

Step-by-step explanation:

x - 2y = 12

First step is to solve for y, so

\(x - 2y = 12\)

Then, subtract x on both sides to isolate the variable, y.

\(-2y = -x + 12\)

Divide both sides by -2

\(y = \frac{1}{2}x - 6\)

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

The domain is {-3,-1,0,2,5}

Domain is the set of x values

Range is the set of y values

We are given the domain x, we need to find out the y values using the equation: \(y= \frac{1}{2}x - 6\)

\(y = \frac{1}{2}(-3) -6 = \frac{-15}{2} = -7.5\\\\y = \frac{1}{2}(-1) -6 = \frac{-13}{2} = -6.5\\\\y = \frac{1}{2}(0) -6 = -6\\\\y = \frac{1}{2}(2) -6 = -5\\\\\\y = \frac{1}{2}(5) -6 = -\frac{7}{2} = - 3.5\)

therefore,

when x is -3: y = -7.5

when x is -1: y = -6.5

when x is 0: y = -6

when x is 2: y = -5

when x is 5: y = -3.5

Range is {-7.5, -6.5, -6 , -5, -3.5}

hope this helps and is right :)

p.s. i really need brainliest

The length of side BD which is the altitude of the triangle is 2√(70)

The length of BD is solved using similar triangles. This is defined by triangles formed from triangle ABC and they include

Let the altitude be h, hence we have the formula of the proportions as

AD / h = h / DC

plugging the values gives

20 / h = h / 14

h^2 = 20 * 14

h = √(20 * 14 )

h = √(280)

h = 2√(70)

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If 2 pencils are drawn randomly without replacement, the probability that both pencils drawn are gold is 3/28.

There are 8 pencils in total, and 3 of them are gold.

When we draw the first pencil, there are 8 options. If we draw a gold pencil, there will be 2 gold and 7 total pencils left. If we draw a blue pencil, there will be 3 gold and 6 total pencils left.

If the first pencil drawn is gold, the probability of drawing another gold pencil on the second draw is 2/7.

If the first pencil drawn is blue, the probability of drawing a gold pencil on the second draw is 3/7.

Therefore, the probability of drawing two gold pencils without replacement is:

(3/8) * (2/7) = 6/56

This fraction can be simplified by dividing both the numerator and denominator by their greatest common factor, which is 2:

6/56 = 3/28

So, the probability that both pencils drawn are gold is 3/28.

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As similarity theorem, the value of x that will make the triangles similar by SSS similarity theorem is 77.

Similarity theorem:

In math, similarity theorem refers the line segment splits two sides of a triangle into proportional segments if and only if the segment is parallel to the triangle's third side.

Given,

Here we need to find the t value of will make the triangles similar by the similarity theorem.

For example, we are told that the 2 triangles are similar by SSS theorem.

Here we know that, SSS means Side - Side -Side and it is a congruence theorem which states that the 3 corresponding sides of two triangles have same ratio, then we can say that the two triangles are congruent by SSS theorem

Therefore, in the triangles ,applying the SSS postulate gives;

=> x/35 = 44/20

Then by applying the multiplication property of equality, let us multiply both sides by 35 to get;

=> x = (44 * 35)/20

When we simplify this one then we get,

=> x = 77

Therefore, the value of x is 77.

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Answer:

The slope is 2.5

Step-by-step explanation:

hope this helps <3

Answer:

The slope is 2.5 between each pair

Step-by-step explanation:

Hope it's helpful for you ✌️

Step-by-step explanation:

answer 2. should be right

Answer:

300 students

Step-by-step explanation:

Hope this answer helps you :)

Have a great day

Mark brainliest

30 students brought papers.

Any number of equal parts is represented by a fraction, which also represents a portion of a whole. A fraction, such as one-half, eight-fifths, or three-quarters, indicates how many components of a particular size there are when stated in ordinary English.

Given

3/4 th of 40 brought papers

students brought paper = 3/4 *40 = 3*10 = 30

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\(\huge \bf༆ Answer ༄\)

Let's Solve for t ~

➢ \( \sf q = \dfrac{2 - 4t}{t + 3} \\\)

➢ \( \sf{q(t + 3) =2 - 4t }\\\)

➢ \( \sf{qt + 3q} = 2 - 4t\\\)

➢ \( \sf{qt + 4t = 2 - 3q }\\\)

➢ \( \sf{t(q + 4) = 2 - 3q}\\\)

➢ \( \sf{t = \dfrac{2 - 3q}{q + 4} }\)

Answer:

t = (2 - 3q)/(q + 4).

Step-by-step explanation:

We cross multiply:

q(t + 3) = 2 - 4t

qt + 3q = 2 - 4t

qt + 4t = 2 - 3q

t(q + 4) = 2 - 3q

t = (2 - 3q)/(q + 4).

Part A:

An open circle on a number line represents that the value at that point is not included in the solution set of the inequality.

This means that the boundary point is not a valid solution to the inequality. It is used when the inequality is strict, such as x < 5, where 5 is not included in the solution set.

Part B:

A closed circle on a number line represents that the value at that point is included in the solution set of the inequality.

This means that the boundary point is a valid solution to the inequality. It is used when the inequality is non-strict, such as x ≤ 5, where 5 is included in the solution set.

Part C:

The shading on the number line represents the set of all values that satisfy the inequality.

The shaded region includes all the points that satisfy the inequality, and may extend to either the left or right of the boundary points, depending on the direction of the inequality.

The shading may be above or below the line, depending on whether the inequality involves greater than or less than.

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Answer:

1. 424

Step-by-step explanation:

1. if one coach has 53 passengers then 8 coaches will have 53*8=424

a) balance factor

The balance factor of a node in a binary tree is defined as the height of its right subtree minus the height of its left subtree. It is commonly used in balance algorithms for maintaining balanced binary trees, such as AVL trees.

What is balance factor?

The balance factor is a keyword that represents the measure of the height difference between the left and right subtrees of a node in a binary tree. It is calculated by subtracting the height of the left subtree from the height of the right subtree

Certainly! In a binary tree, the balance factor of a node is a measure of the difference in height between its right subtree and left subtree. It is calculated by subtracting the height of the left subtree from the height of the right subtree.

The balance factor helps in determining the balance or imbalance of a node in a binary tree. It is used as a criterion for tree balancing algorithms, such as the AVL tree. By checking the balance factor of each node, these algorithms ensure that the tree remains balanced and avoids degeneration into a skewed or unbalanced structure.

A balance factor of 0 indicates that the heights of the left and right subtrees are equal, meaning the node is balanced. A positive balance factor means the right subtree is taller than the left subtree, indicating a right-heavy or right-skewed tree. Conversely, a negative balance factor implies the left subtree is taller, indicating a left-heavy or left-skewed tree.

By maintaining balanced trees using the balance factor, efficient search and retrieval operations can be achieved, ensuring optimal performance in various tree-based data structures.

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Answer:

her average speed is 7 and 2/3 miles per hour

Step-by-step explanation:

The demand function of  the number of sets sold will increase by 130 per week is p(x) = (-1 ÷ 13)x + 550.

Determine the coordinates of two points mostly online. Estimate the difference in y-coordinates between these two places. Estimate the difference in x-coordinates between these two places. Divide the y-coordinate difference by the x-coordinate difference.

Let p(x) denote the demand function, with x denoting the number of TV sets desired. As stated in the issue, a $10 decrease in p(x) causes a 130 rise in x. As a result, the slope of the demand function graph is -13 ÷ 130 = -1 ÷ 10.

Given p(1250) = 450,

-1 ÷ 10 = (p(x) - 450) ÷ (x - 1250)

p(x) = (-1 ÷ 13)x + 550

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(a) To present the data, we can sort it in ascending order: 0.21cm, 0.63cm, 0.75cm, 0.91cm, 0.97cm, 0.98cm, 0.99cm, 1.01cm, 1.04cm, 1.05cm, 1.06cm, 1.08cm, 1.08cm, 1.11cm, 1.13cm, 1.15cm, 1.17cm, 1.17cm, 1.17cm, 1.21cm, 1.21cm, 1.23cm, 1.25cm, 1.31cm, and 1.37cm.

(b) We can be 80% confident that the true average pupil dilation diameter falls within this range.

(c) We can be 98% confident that the true average pupil dilation diameter falls within this range.

(d) We can be 95% confident that the true average pupil dilation diameter falls within this range.

e) Yes, the major assumptions is that the data follows a normal distribution.

(a) Observations may include the range of the data (i.e., the difference between the largest and smallest values), the median value, and the frequency distribution of the data.

(b) To construct a confidence interval at 80% confidence, we need to find the sample mean and standard deviation. The sample mean is found by adding up all the values and dividing by the sample size (which is 24 in this case):

x = (1.21 + 0.63 + 1.08 + 0.21 + 0.97 + 1.11 + 1.08 + 1.25 + 1.15 + 0.91 + 1.37 + 1.04 + 1.23 + 0.75 + 1.05 + 0.98 + 1.17 + 1.17 + 1.17 + 1.06 + 1.21 + 1.01 + 1.31 + 0.99 + 1.13) / 24 = 1.05375 cm

Next, we need to find the t-value for a one-tailed t-distribution with 23 degrees of freedom and an alpha level of 0.2 (since we want to be 80% confident). We can use a t-table or a calculator to find that t = 1.318.

Finally, we can use the following formula to calculate the confidence interval:

CI = x ± t * (s / √(n))

Plugging in the values, we get:

CI = 1.05375 ± 1.318 * (0.19232 / √(24)) = (0.9408 cm, 1.1667 cm)

(c) To construct a confidence interval at 98% confidence, we need to repeat the same process using a different t-value. This time, we need to find the t-value for a one-tailed t-distribution with 23 degrees of freedom and an alpha level of 0.01 (since we want to be 98% confident). Using a t-table or a calculator, we can find that t = 2.500.

Using the same formula as before, we can calculate the 98% confidence interval:

CI = 1.05375 ± 2.500 * (0.19232 / √(24)) = (0.8804 cm, 1.2271 cm)

(d) To construct a confidence interval at 95% confidence, we need to repeat the same process using a different t-value. This time, we need to find the t-value for a one-tailed t-distribution with 23 degrees of freedom and an alpha level of 0.025 (since we want to be 95% confident). Using a t-table or a calculator, we can find that t = 2.069.

Using the same formula as before, we can calculate the 95% confidence interval:

CI = 1.05375 ± 2.069 * (0.19232 / √(24)) = (0.9026 cm, 1.2049 cm)

(e) This assumption is necessary to use the t-distribution to construct confidence intervals. If the data is not normally distributed, then other methods, such as the bootstrap or permutation tests, may need to be used instead.

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Answer:

\(-1\)

Step-by-step explanation:

\(6 - y + 3\)

\(-y+3+6\)

\(-y+9\)

A coefficient is a number that is used to multiply with a variable.

\(-y=-1y\)

\(-1y+9\)

Answer:

Vertex:  (−2,7)

Step-by-step explanation:

May I have brainliest please? :)

Shryia was reading at a speed of 524.67 pages per hour, and it took her approximately 917.06 hours to read the entire book.

To find Shryia's reading speed, we can use the formula:

\(reading speed = (total pages - pages left) / time\)

We are given that the book has 481481481 pages, and after reading for 1.5 1.51, point, 5 hours, Shryia had 403403403 pages left to read. So, the total number of pages she read is:

481 - 403 = 787

The time taken to read these pages is:

1.5 hours

So, her reading speed is:

reading speed = 787 / 1.5 = 524.67 pages per hour

To find how long it took her to read the entire book, we can use the formula:

time = total pages / reading speed

So, the time taken to read the entire book is:

time = 481481481 / 524.67 ≈ 917.06 hours

Therefore, Shryia was reading at a speed of 524.67 pages per hour, and it took her approximately 917.06 hours to read the entire book.

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Answer:

10,582 pieces of candy.

Step-by-step explanation:

1 jar contains 286 pieces

Therefore, 37 jars contain:

37 × 286

= 10,582 pieces of candy.

Answer:

10,582 pieces of candy behind the counter

Step-by-step explanation:

multiply 37 by 286 and you get 10,582

Answer:

point A = (3,9)

point D = (9,3)

point B = (6,5)

point C = (5,6)

Step-by-step explanation:

there's not really much to explain so yeah.

so the one located at 3,9 would be A

the one that says 9,3 that would be D

the one that says 6,5 would be B

and 5,6 would be C

Step-by-step explanation:

what u should do is to start from the x axis which is at the bottom so eg u have 4,5...4 would go at the X axis and the 5 would go at the Y axis..so u should always start from the x axis basically

hoped this helped

An indirect cold water supply system is a system that involves the use of a cold water storage cistern as the source of water supply instead of the main water supply.

The following are two (2) advantages and three (3) disadvantages of installing an indirect cold water supply system:

Advantages of indirect cold water supply system:

1. The system is less likely to be affected by water pressure changes in the main supply since it is fed by the cistern.

2. It provides for reserve water capacity during water supply interruptions or emergencies.

D is advantages of indirect cold water supply system:

1. An indirect system requires more installation space than a direct system because a cold water storage cistern is necessary.

2. The system is more expensive to install than a direct system since it involves the use of additional components such as a cold water storage cistern.

3. It requires regular maintenance because the cistern must be cleaned and inspected on a regular basis to prevent contamination.

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The set notation includes all values from -5 to 0, but the domain only includes the integer values

eg: something like -1.2 is in the second set, but it is not in the set {-5,-4,-3,-2,-1}

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

Further explanation:

Let's go through the answer choices one by one

Answer:

5x - 4y = -20

y = x + 5

y = -x + 5

Step-by-step explanation:

The formula for slope-intercept form is y = mx + b, with b being the y-int.

If the equation does not have an x, y, or b, it is not a slope-intercept form.

5x - 4y = -20 (can be rearranged to y = 5/4x + 5)

y = 1, x = 5/4, b = 5

y = x + 5y

x = 1, y = 1, b = 5

y = -x + 5

x = -1, y = 1, b = 5.

Other answer choices does not have all three variables.

The radius of the water bottle is 2.14 cm

The water bottle is said to be cylindrical, so its volume can be expressed as the volume of a cylinder.

Volume of a cylinder \(V = \pi r^2 h\)

Where:

\(\text{h = height}\)

\(\text{r = radius}\)

Making the radius the subject of formula;

\(r^2 = \dfrac{V}{\pi h}\)

\(r = \sqrt{\dfrac{V}{\pi h} }\)

Given:

\(\text{Volume V} = 104 \ \text{cm}^3\)

\(\text{height h} = 7.2 \ \text{cm}\)

\(\pi = 3.14\)

Substituting the given values:

\(r = \sqrt{\dfrac{104}{3.14\times7.2} }\)

\(r = 2.14\ \text{cm}\)

The radius of the water bottle is 2.14 cm

The following are the rules of monomials and exponents that are used:

Monomials: It is a polynomial with one term, where each term consists of a coefficient and a variable.

The coefficients and variables are multiplied together and each of the products that is obtained is known as monomial.

For example, 4x, 3x², 5x²y, 10, 2x³, etc.

Exponent: The exponent of a number says how many times to use the number in multiplication.

For example, in ³⁴, 3 is the base, 4 is the exponent, and ³⁴ means 3 multiplied by itself 4 times. 3 x 3 x 3 x 3 = 81.Rules:Product rule:

When multiplying monomials that have the same base, add the exponents.

For example, a³ x a² = a³+² = a⁵. Anything to the zero power equals 1.

For example, x⁰ = 1.

Answer key: The answer key will include solutions for all the given questions that are present in the worksheet. Each problem in the worksheet has to be answered using the above rules of monomials and exponents.

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Answer:

C. 11

Step-by-step explanation:

Simplify each term

Add 6 and 1

2x7−3

Multiply  

2 by 7

14−3

Subtract  

3 from 14

And you get  

11

Answer:

I think its 250

Step-by-step explanation:

500 divided by 2=250

The calculated value of the total interest is 12479.04

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

25998 x .08 x 6

In the above equation, we have

Principal = 25998

Rate of interest = 0.08

Time = 6

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

Total interest = 25998 x .08 x 6

Evaluate

Total interest = 12479.04

Hence, the total interest is 12479.04

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To determine the long-run equilibrium for each firm's production of kites, we need to find the level of output where marginal cost (MC) equals marginal revenue (MR). In perfect competition, firms maximize their profit by producing at the level where MC = MR.

Given the marginal cost function MC = 0.02q, we equate it to the marginal revenue, which is equal to the market price (P) in perfect competition. So, we have:

0.02q = P

Now, we need to find the price at which the quantity demanded (QD) equals the quantity supplied (QS) in the market. To do this, we set QD equal to QS:

QD = QS

Substituting the demand function QD = 4000 - 1000P into the equation, we get:

4000 - 1000P = QS

Now, we can solve for the price (P):

4000 - 1000P = 0.02q

Simplifying further:

1000P = 4000 - 0.02q

P = (4000 - 0.02q) / 1000

Now, we can substitute the value of P into the equation for MC to find the level of output (q):

0.02q = P

0.02q = (4000 - 0.02q) / 1000

Solving for q:

0.02q = 4 - 0.00002q

1.00002q = 4

q = 4 / 1.00002

q ≈ 3999.8

In the long-run equilibrium, each firm will produce approximately 3999.8 kites.

The long-run supply curve for kites in perfect competition is horizontal at the minimum average total cost (ATC) of the firms. This is because in the long run, firms have enough time to adjust their inputs and optimize their production processes, leading to production at the lowest possible cost.

a. To find the number of kites sold and the number of firms in the kite industry, we substitute the price (P) into the demand function QD = 4000 - 1000P:

QD = 4000 - 1000P

QD = 4000 - 1000(4000 - 0.02q) / 1000

Simplifying:

QD = 4000 - 4000 + 0.02q

QD = 0.02q

Since q represents the output per firm and we know that each firm produces around 3999.8 kites, we can substitute this value:

QD = 0.02 * 3999.8

QD ≈ 79.996

Approximately 80 kites will be sold. To find the number of firms in the kite industry, we divide the total quantity supplied by the output per firm:

QS = 3999.8

Number of firms = QS / q

Number of firms = 3999.8 / 3999.8

Number of firms = 1

b. In the very short run, when it is impossible to manufacture any more kites than those produced for that week, the price of kites will be determined by the demand and supply conditions. With the demand function QD = 5000 - 500P, we can find the equilibrium price:

QD = QS

5000 - 500P = QS

Substituting the supply quantity from above:

5000 - 500P = 3999.8

Solving for P:

500P = 5000 - 3999.8