Workout value of x and why

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

Answer:

the answer is attached to the picture

Answer:

2. The Second Term should be positive, 3. The last term should be -1 1/2, not -1 1/4. and 4. He added -8 and -2 instead of multiplying -8 by -2.

Step-by-step explanation:

B (23x5)-s

1) Gathering the data:

5 6th grade classes of 23 students

S= absent students

2) Since S represent the absent students. The question is How many went to the museum.

Then the expression that represents the absent students

is

5 classes of 23 students:

(23 x 5)

Minus the number of absent students, so:

(23x5)-s

Answer: B= (5z+9) (5z-9)

Step-by-step explanation:

Answer:

Step-by-step explanation:

Step 1: Use the sum-product pattern

25z² - 81 =

25z² + 45z - 45z - 81 =

Step 2: Common factor from the two pairs

(25z² + 45z) + (−45z − 81) =

Step 3: Rewrite in Factored Form

5z (5z + 9) − 9 (5z + 9) =

(5 - 9) (5 + 9)

Solution:

B: (5 + 9) (5 - 9)

Answer:

81 square kilometers

Step-by-step explanation:

the area = 9 × 9

= 81 square kilometers

Answer:

it is 13:7

Step-by-step explanation:

An unreliable study can occur if the test administration is inconsistent

Consistency is the key to success in anything and it implies to the studies and surveys as well. If you want the results of the study to be reliable, then you must be consistent in test administration.

Inconsistency can lead to various issues like improper representation of the feedback which may alter the results. This can lead to various problems.

For example, test performed at certain time may have a different set of people and absence of periodic tests can accommodate feedback from irrelevant people.

Therefore, a proper set schedule must be followed for the tests with consistency.

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The generating function for the sequence {an} is given by a(x) = (1 + 2x) / (1 - x - 6x^2). It captures the terms of the sequence {an} as coefficients of the powers of x.

To find the generating function of the sequence {an}, we can use the properties of generating functions and solve the given recurrence relation.

The given recurrence relation is: an = an-1 + 6an-2

We are also given the initial conditions: a0 = 1 and a1 = 3.

To find the generating function, we define the generating function A(x) as:

a(x) = a0 + a1x + a2x² + a3x³ + ...

Multiplying the recurrence relation by x^n and summing over all values of n, we get:

∑(an × xⁿ) = ∑(an-1 × xⁿ) + 6∑(an-2 × xⁿ)

Now, let's express each summation in terms of the generating function a(x):

a(x) - a0 - a1x = x(A(x) - a0) + 6x²ᵃ⁽ˣ⁾

Simplifying and rearranging the terms, we have:

a(x)(1 - x - 6x²) = a0 + (a1 - a0)x

Using the given initial conditions, we have:

a(x)(1 - x - 6x²) = 1 + 2x

Now, we can solve for A(x) by dividing both sides by (1 - x - 6x^2²):

a(x) = (1 + 2x) / (1 - x - 6x²)

Therefore, the generating function for the given sequence is a(x) = (1 + 2x) / (1 - x - 6x²).

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Answer:

The number of days is at most 5 days

= d ≤ 5 days

Step-by-step explanation:

A rental car company charges $31 per day to rent a car and $0.13 for every mile driven. Jocelyn wants to rent a car, knowing that:

She plans to drive 500 miles.

• She has at most $220 to spend.

At most means Less than or equal to $220

The inequality for expressing this = ≤

Hence, the inequality which can be used to determine d, the number of days Jocelyn can afford to rent while staying within her budget.

$31 × d + $0.13 × 500 miles ≤ $200

The inequality is given as:

31d + 65 ≤ 220

Solving further

31d ≤ 220 -65

31d ≤ 155

d ≤ 155/31

d ≤ 5

Therefore, the number of days is at most 5 days

Answer: 2\(\sqrt{2}\)

Step-by-step explanation: First plug in the value, which is \(\sqrt{8}\)

Then divided to 2\(\sqrt{2}\)

Answer: Supplies

Step-by-step explanation: the best way to help people is to send them supplies cause usually after a hurricane they could have there home or water source destroyed

What Jerry can do if he is testing for normality of the residuals in the regression analysis is to; construct a normal quantile plot of the residuals and see if the result is an approximately upward sloping straight line.

Regression Analysis creates an equation that is the best fit of the given data of both the dependent and the independent variables. Now, it should be noted that the residuals are the error in the regression equation predicted values as well as the actual sample values.

The quantile plot is basically a standard way to tell us whether the data is distributed. Now, If the data points stay quite close to an upward sloping line in the quantile plot, then it can be assumed that the residuals are normally distributed. Then, values of the coefficients are tested to check that they are not statistically equal to zero via a t-test. The t-test is required to know whether the results of the regression are seen to be significant. Finally, results of a t-test usually possess a requirement that the residuals, is normally distributed.

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Answer:

fe

Step-by-step explanation:

Answer:

Step-by-step explanation:

At point D rotate 90° counter-clockwise.  The translate 3 units left and 2 unit up.

Answer:

no it makes an acute angle

Step-by-step explanation:

9+13+16=38

to be a right triangle they need to equal 90

Let's simplify the expression step by step: Expand the squared term:

(x - 3y)² = (x - 3y)(x - 3y) = x² - 6xy + 9y²

Expand the second term:

3(x + y)(x − 4y) = 3(x² - 4xy + xy - 4y²) = 3(x² - 3xy - 4y²)

Expand the third term:

x(3x + 4y + 3) = 3x² + 4xy + 3x

Now, let's combine all the expanded terms:

(x - 3y)² + 3(x + y)(x − 4y) + x(3x + 4y + 3)

= x² - 6xy + 9y² + 3(x² - 3xy - 4y²) + 3x² + 4xy + 3x

Combining like terms:

= x² + 3x² + 3x² - 6xy - 3xy + 4xy + 9y² - 4y² + 3x

= 7x² - 5xy + 5y² + 3x

The simplified form of the expression is 7x² - 5xy + 5y² + 3x.

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The probability of x being equal o 19.62 is d) 0.

It is given that x is normally distributed with a mean of 12 and a standard deviation of 3.

Now, Normal distribution is a continuous distribution.

This implies that the probability is measured over an interval, taking an infinite number of points in between.

If we plot a continuous distribution, the probability here at a point is not the value of the y coordinate at that point. Instead, it is seen as an area under the curve of the distribution, between the two intervals, say a and b.

Therefore, if we take up a single point say c, then the probability will be the area under the curve from c to c, which will obviously be 0.

Hence, the probability that x = 19.62 will be 0.

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The correct answer is C. $11,250.

To calculate the interest on a 90-day, 9% note for $50,000, we can use the simple interest formula:

Interest = Principal × Rate × Time

Given:

Principal (P) = $50,000

Rate (R) = 9% = 0.09 (decimal)

Time (T) = 90 days

Since the interest is calculated based on a 360-day year, we need to convert the time in days to a fraction of a year:

Time (T) = 90 days / 360 days = 0.25 (fraction of a year)

Now we can calculate the interest:

Interest = $50,000 × 0.09 × 0.25

Interest = $11,250

Rounded to the nearest dollar, the interest on the 90-day, 9% note for $50,000 is $11,250.

Therefore, the correct answer is C. $11,250.

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The break-even point is 1100 products sold. This means that if the store can sell 1100 products, it will be able to cover its costs and make a profit.

What is average ?

The average is a measure of central tendency that is calculated by adding a set of values together and dividing the sum by the number of values. It is also known as the arithmetic mean. It is a way to represent a typical value of a dataset.

The break-even point is the point at which the cost of the products equals the revenue from the sales of the products. To find the break-even point, we need to set the cost function (C(x) = 550 + 3.00x) equal to the revenue function (R(x) = 5.50x) and solve for x.

C(x) = 550 + 3.00x = R(x) = 5.50x

3.00x = 5.50x - 550

0.50x = 550

x = 1100

So the break-even point is 1100 products sold. This means that if the store can sell 1100 products, it will be able to cover its costs and make a profit.

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According to the question The estimates for the instantaneous velocity at \(\(t = 3\)\) seconds using difference quotients with \(\(h = 0.1\), \(h = 0.01\), and \(h = 0.001\)\) are 114, 115, and 116, respectively.

To estimate the instantaneous velocity at \(\(t = 3\)\) seconds using difference quotients with different values of \(\(h\),\) we can use the formula for difference quotients:

\(\[v(t) = \lim_{{h \to 0}} \frac{{d(t+h) - d(t)}}{{h}}\]\)

Given:

\(\(d(t) = 7t(t+4)\)\)

\(\(t = 3\)\)

We will calculate the difference quotients for \(\(h = 0.1\), \(h = 0.01\), and \(h = 0.001\)\) and round them to at least six decimal places.

For \(\(h = 0.1\):\)

\(\[v(3) \approx \frac{{d(3+0.1) - d(3)}}{{0.1}}\]\)

\(\[v(3) \approx \frac{{d(3.1) - d(3)}}{{0.1}}\]\)

Substituting the values into the expression:

\(\[v(3) \approx \frac{{7(3.1)(3.1+4) - 7(3)(3+4)}}{{0.1}}\]\)

Using a calculator, we find:

\(\[v(3) \approx 113.8\]\)

For \(\(h = 0.01\):\)

\(\[v(3) \approx \frac{{d(3+0.01) - d(3)}}{{0.01}}\]\)

Substituting the values:

\(\[v(3) \approx \frac{{7(3.01)(3.01+4) - 7(3)(3+4)}}{{0.01}}\]\)

Using a calculator, we find:

\(\[v(3) \approx 115.41\]\)

For \(\(h = 0.001\):\)

\(\[v(3) \approx \frac{{d(3+0.001) - d(3)}}{{0.001}}\]\)

Substituting the values:

\(\[v(3) \approx \frac{{7(3.001)(3.001+4) - 7(3)(3+4)}}{{0.001}}\]\)

Using a calculator, we find:

\(\[v(3) \approx 115.59\]\)

Rounding the values to the nearest integer:

For \(\(h = 0.1\), \(v(3) \approx 114\).\)

For \(\(h = 0.01\), \(v(3) \approx 115\).\)

For \(\(h = 0.001\), \(v(3) \approx 116\).\)

Therefore, the estimates for the instantaneous velocity at \(\(t = 3\)\) seconds using difference quotients with \(\(h = 0.1\), \(h = 0.01\), and \(h = 0.001\)\) are 114, 115, and 116, respectively.

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Answer:

it may be B but I think it's C

Step-by-step explanation:

not sure if this is right, but I would say not congruent. it may be sas but in order for it to be sas then the Angle must be in-between the two congruent sides

Both triangles are congruent by (SAS) side-angle-side postulate.

The correct option is B.

Two triangles are said to be congruent if all three corresponding sides are equal and all the three corresponding angles are equal in measure. These triangles can be slides, rotated, flipped and turned to be looked identical.

Given,

Two triangles

ABC and DEC

AB = DE    (Given)

BC = EC     (Given)

∠ACB = ∠DCE  (Vertical angles at intersection of DB and AE)

By, Side-Angle-side theorem of congruent triangles,

ΔABC ≅ΔDEC

Hence, by side-angle-side (SAS) postulate, both triangles are congruent.

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Answer:

105 degrees, by the alternate interior angles theorem

Step-by-step explanation:

Answer:

7

Step-by-step explanation:

26-5=21

21 divided by 3 equals 7.

Answer: 7

Step-by-step explanation:

26 - 5 = 21

21 / 3 = 7

hope this helps

plz mark brainleist

Using trigonometric functions, we can  find a side length of a right triangle with an angle and a side.

Trigonometric ratios are the ratios of a right triangle's sides. The sine (sin), cosine (cos), and tangent (tan) are three often used trigonometric ratios. There are other trigonometric ratios which are reciprocals of these ratios.

Trigonometric ratios can be computed either using the provided acute angle or by calculating the ratios of the right-angled triangle's sides.

You can determine the hypotenuse by dividing the length of the side by sin(θ) if you have an angle and the side opposite to it. Alternatively, to find the length of the side next to the angle, divide the length by tan(θ).

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Answer:

90.244

Step-by-step explanation:

111 ÷ 1.23 = 90.244

Answer:

C. S

Step-by-step explanation:

Because they are 27 letters so

0.3* 27= 8.1

So 27-8= 19 so the 19th letter is S