2x - 15

Help meeeeee

Answer: Sorry i can't see that brah

Step-by-step explanation: Thanks homie

The simplified version of (sec a - cosec a) / (sec a + cosec a)  is cosec 2a(cosec 2a - 2) / (sec²a - cosec²a).

The study of correlations between triangles' side lengths and angles is known as trigonometry. The field was created in the Hellenistic era in the third century BC as a result of the use of geometry in astronomical research.

Given:

(sec a - cosec a) / (sec a + cosec a)

Multiply the numerator and denominator by (sec a - cosec a)

(sec a - cosec a) / (sec a + cosec a)  × (sec a - cosec a)

(sec²a + cosec²a -2sec a cosec a) / (sec²a - cosec²a)

As we know,

\(sec^2a + cosec^2a = sec^2a \ cosec^2a\)

sec² a cosec² a - 2sec a cosec a /  (sec²a - cosec²a)

sec a cosec a (sec a cosec a - 2) / (sec²a - cosec²a)

cosec 2a(cosec 2a - 2) / (sec²a - cosec²a)

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this is the answer gimme brainliest

Weight, w of Mark's sister is 34 pounds

What is given in the question?

Mark's weight = 74 lb.

Mark's sister's weight = w lb.

Since Mark and his sister together weigh 6 lb. more than thrice the weight of Mark's sister alone.

We can write: 74 + w = 6 + 3w

According to the given question:

To solve this equation for w, first add -w to both sides of the equation.

74 + w - w = 6 + 3w - w

74 = 6 + 2w

Now add -6 to both sides and simplify:

74 - 6 = 6 + 2w -6  

68 = 2w

Therefore, w= (68/2) = 34 lb

Let's verify the answer

Marks weight = 74 lb.

Marks's sister's weight = 34 lb

Sum of Mark and his sister's weight = 108

Three time Mark's sister's weight

= 3*34 = 102

Also 108 = 102+6 which is the statement of the problem.

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Subtract 12 from both sides

5 - 12 = k/4

Simplify 5 - 12 to -7

-7 = k/4

Multiply both sides by 4

-7 * 4 = k

Simplify -7 * 4 to -28

-28 = k

Switch sides

k = -28

Answer:

50%

Step-by-step explanation:

so 1 half is colored in so 1/2 is also 50%

Answer:

it's 50% because it's half the circle

Answer:

x = 8 , ∠ B = 70°

Step-by-step explanation:

∠ A and ∠ B are alternate exterior angles and are congruent, that s

8x + 6 = 4x + 38 ( subtract 4x from both sides )

4x + 6 = 38 ( subtract 6 from both sides )

4x = 32 ( divide both sides by 4 )

x = 8

Then

∠ B = 4x + 38 = 4(8) + 38 = 32 + 38 = 70°

(12x^5 + x² + 4) /4.

Polynomials are sums of terms of the form k⋅xⁿ, where k is any number and n is a positive integer. For example, 3x+2x-5 is a polynomial. Introduction to polynomials. This video covers common terminology like terms, degree, standard form, monomial, binomial and trinomial.

Given equation

x²/4+3x^5+1

Find common denominator

x²/4+3x^5 . 4/4+4/4

Combine fractions with common denominator

(x²+3x^5 . 4+4)/4

Multiply the numbers

(x²+12x^5 +4)/4

Rearrange terms

(x²+12x^5 +4)/4

(12x^5 + x² + 4) /4

Thus , solution of the given polynomial is (12x^5 + x² + 4) /4. we can also write it as -

3x^5 + x² / 4 + 1.

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The mistake in Mike's steps is in step 3 and the correct solution is 10x/3 - 2 = y

The solution of the equation is given as

10x - 3y = 6

      +3y     +3y

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

10x = 3y + 6

-6           -6

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

(10x - 6)/3 = 3y/3

10x - 2 = y

In the above steps, we have the following equation

(10x - 6)/3 = 3y/3

When the above equation is expanded, we have

10x/3 - 6/3 = 3y/3

Evaluate the quotient in the above equation

So, we have

10x/3 - 2 = y

The abvoe equation is different from Mike's result

Hence, the mistake in Mike's steps is in step 3 and the correct solution is 10x/3 - 2 = y

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Answer:

\(x>0\:or\:x<0\)

As seen in graph, there is an open circle on 0, and it goes out left and right.

Option C is correct option.

Step-by-step explanation:

We need to draw the graph for the solution of the open sentence \(|x| +3>3\)

First we will solve the inequality: \(|x| +3>3\)

Adding -3 on both sides

\(|x| +3-3>3-3\\|x| >0\)

We know that \(If\:|x|>0,\:then\:x>0\:or\:x<0\)

So, we have

\(x>0\:or\:x<0\)

Now, the graph is attached in the figure below

As seen in graph, there is an open circle on 0, and it goes out left and right.

Option C is correct option.

Answer:

x = 12

Step-by-step explanation:

The consecutive angles in a parallelogram are supplementary, thus

7x - 12 + 108 = 180, that is

7x + 96 = 180 ( subtract 96 from both sides )

7x = 84 ( divide both sides by 7 )

x = 12

By percentage, a passive home construction is typically around 50% more expensive compared to a conventional home construction.

A passive home construction is generally more expensive compared to a conventional home construction due to several factors. Passive homes are designed to meet stringent energy efficiency standards, requiring specialized materials, insulation, ventilation systems, and high-performance windows and doors. These energy-saving features contribute to the increased cost of construction. Additionally, passive homes often incorporate advanced technologies like heat recovery systems and solar panels, further adding to the expenses.

However, it's important to note that while the initial construction costs of a passive home may be higher, the long-term energy savings and reduced operating costs can offset the higher upfront investment. Passive homes offer improved energy efficiency, better indoor comfort, and reduced environmental impact, making them a viable choice for those seeking sustainable and energy-efficient housing solutions.

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Answer:

All values of x are possible.

Step-by-step explanation:

3x-6+1=-2x-5+5x

3x - 5 = 3x - 5               [Simplify by combining like terms on both sides]

Both sides of this equation are the same.  There is no single value of x that can be identified,  All values of x are possible.  The only thing that can be said about this equation is "TRUE."

Answer:

4(−2x + 4) = -8x + 16

Step-by-step explanation:

4(−2x + 4) = [?]x + [ ]

To find what number is in the blanks, use the distributive property.

4(−2x + 4) = -8x + 16

Hope this helps!

Answer:

.23809523809

Step-by-step explanation:

PLS GIVE BRAINLIEST

The difference in the dollar value of Assistantship (Stipend) between art and science fields with  standard errors is equal to 1.214.

Mean      24041.62203                 25952.36501

Sample mean difference between Assistantship (stipend) in arts and science is equal to

=  $25952.36501 - $24041.62203

= $1910.74298.

Hypothesized mean difference is 0 (there is no difference in stipend between the two fields).

Variance        621483.0801            615193.5853

Sample size    521                             479

Standard error of the difference is,

=√[(variance in arts / sample size in arts) + (variance in science / sample size in science)]

= √[(615193.5853 / 479) + (621483.0801 / 521)]

= $49.77

t-statistic

= (sample mean difference - hypothesized mean difference) / standard error of the difference

Substitute the values into the t-statistic formula,

⇒ t-statistic = ($1910.74298 - 0) / $49.77

⇒ t-statistic = 38.39

t-critical value for a two-tailed test with 992 degrees of freedom at a significance level of 0.05 is 1.9624.

t-statistic (38.39) > t-critical value (1.9624)

⇒Reject the null hypothesis that there is no difference in stipend between the two fields.

standard errors

= t-statistic / √(sample size)

= 38.39 / √(479 + 521)

= 38.39 /31.62

=1.214

Therefore,  the difference in the dollar value of Assistantship (Stipend) between these two fields is 1.214 standard errors away from the hypothesized difference.

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In rounding a number to nearest multiple of 10, look at the digit to the right of the number to be rounded:

402053 rounded to the nearest thousand

　　　　‎‎\( \tt 3 \: - Ones \\ \tt 5 \: - Tens \\ \tt 0 \: - Hundreds \\ \tt 2\: - Thousands \\ \tt 0 \: - Ten \: Thousands \\ \tt 4 \: - Hundred \: Thousands\)

Since, 2 is on hundreds place look at the right digit to be rounded. So, 0 si on right digit let's round off from 2 let's keep it 2 then replace the other digits of zero.

Therefore, 402053 is now 402000

When rounded to the nearest thousand, the number 402053 becomes 400000.

Rounding a number to the nearest thousand means finding the closest multiple of 1000 to the given number. Let's work with the number 402053 and round it to the nearest thousand.

First, let's look at the digit in the thousands place, which is the digit in the "hundreds of thousands" position. In 402053, this digit is 4.

Next, look at the digit immediately to the right of the thousands place, which is the hundreds place. In 402053, this digit is 0.

Since the hundreds place is 0, we don't need to round up. So, the nearest thousand to 402053 is simply 400000.

Therefore, when rounded to the nearest thousand, the number 402053 becomes 400000.

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Answer:

1.6

i think

Step-by-step explanation:

Answer:

1.6

Step-by-step explanation:

1.6

1.625

2 is closer to 0 than 10

The required, in 2007 the price per gallon was 7b more than the price of a gallon of fuel in the year 2000. Where b is the inflation factor.

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
Let 'a' be the cost per gallon of fuel in the year 2000, and 'b' be the inflation rate per year. If the rate of inflation is constant then
After 7 year inflation = 7b
Cost of fuel in 2007 = a + 7b

Now,
according to the question
Change in cost of fuel
= cost in 2007 - cost in 2000
= a + 7b - a
= 7b

Thus, the required, in 2007 the price per gallon was 7b more than the price of a gallon of fuel in the year 2000. Where b is the inflation factor.

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Let p(x) be the required polynomial.

we are given that p(x) has a zero 1 with multiplicity 2

in other word, this means that (x-1) occurs twice as a factor of p(x).

Expressions with polynomial functions include variables with various degrees, non-zero coefficients, positive exponents (of variables), and constants. A polynomial in "b" of degree 2 is, for instance, f(b) = 4b2 - 6.

Likewise, (x-3) appears as a factor of p(x) once.

we are also given that the degree of p(x) is 3.

So, p(x) can not have more than 3 linear factors.

Altogether,

p(x) = k(x-1)^2  (x-3), where constant k ∈ R - {0}.

We may take k = 1 and get the desired polynomial,

p(x) = ( x-1)^2 ( x-3) = x^3 - 5x^2 +7x -3

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Answer:

The equation is \(y-(-8) = 4(x-2)\).

Step-by-step explanation:

The point-slope form of a line is represented by the formula \(y-y_1 = m (x-x_1)\). In order to write an equation of a line in point-slope form, we would need to substitute real values for the \(m\), \(x_1\), and \(y_1\) in the formula.

Since \(m\) represents the slope of the line, substitute 4 in its place. Since \(x_1\) and \(y_1\) represent the x and y values of one point the line intersects, substitute the x and y values of (2,-8) in the formula as well. Substitute 2 for \(x_1\) and -8 for \(y_1\). This results in the following equation and answer:

\(y-(-8) = 4(x-2)\)

(Usually, we would simplify the double negatives on the left side to a positive, but because you have to type the values in to answer the problem and cannot change the written negative sign already visible in the equation, that would be the answer. I believe you can just type in -8 for the first box.)      

Answer:

\(x_1= 6, x_2=5\)

Step-by-step explanation:

Well well well, let's write it down as an equation

\(2x^2-x+55 = (x+5)^2\)

And then let's just do what's asking us to do

\(2x^2-x+55 = x^2+10x+25\\x^2-11x+30=0\)At this point, it's quadratic formula time. Let's first calculate \(\Delta = b^2-4ac\) to simplify the process

\(\Delta = 121-4(1)(30) = 121-120=1\)

\(x= \frac{11\pm1}{2}; x_1= 6, x_2=5\)

Based on the given information that 2 out of 20 sample points plotted on a control chart are beyond the control limits, the correct answer is D) The evidence is sufficient to indicate that the process is out of control.

Control charts are used to monitor and control processes, with control limits representing the expected boundaries for a process in control.

When data points fall outside these control limits, it indicates that the process is exhibiting variation beyond the expected range.

In this case, the occurrence of 2 out of 20 sample points beyond the control limits suggests that the process is not operating within the expected range of variation.

This provides sufficient evidence to indicate that the process is out of control.

Option B, stating that the evidence is sufficient to indicate the process is in control, is incorrect based on the information provided. The evidence supports the conclusion that the process is out of control, not in control.

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The binding energy of the F-19 nucleus is approximately 143.15 MeV.. The binding energy of an F-19 nucleus is determined by calculating the mass defect.

The mass defectwhich is the difference between the mass of the nucleus and the sum of the masses of its individual protons and neutrons. The F-19 nucleus has a mass of 18.99840325 amu. Each proton has a mass of 1.00728 amu, and each neutron has a mass of 1.008665 amu. To convert amu to energy, we use the conversion factor of 1 amu = 931 MeV. The first step is to calculate the total mass of the protons and neutrons in the F-19 nucleus. There are 9 protons and 10 neutrons in F-19, so the total mass of the protons is 9 * 1.00728 amu = 9.06552 amu, and the total mass of the neutrons is 10 * 1.008665 amu = 10.08665 amu.

Next, we calculate the mass defect by subtracting the total mass of the protons and neutrons from the mass of the F-19 nucleus: 18.99840325 amu - (9.06552 amu + 10.08665 amu) = -0.15376625 amu.

Finally, we convert the mass defect to energy using the conversion factor: -0.15376625 amu * 931 MeV/amu = -143.15071575 MeV.

Therefore, the binding energy of the F-19 nucleus is approximately 143.15 MeV.

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Linear function f with f(-3) = –2 and f(-2) = 3 is f(x)=5x+13.

A linear function is a function that represents a straight line on the coordinate plane. For example, y = 3x - 2 represents a straight line on a coordinate plane and hence it represents a linear function. Since y can be replaced with f(x), this function can be written as f(x) = 3x - 2.

Here, Assuming linear function is f(x)=mx+c

f(-3)=-3m+c=-2   .....(i)

f(-2)=2m+c=3     ......(ii)

Solving both the equations, m=5 and c=13 :

f(x)=5x+13

So linear function f with f(-3) = –2 and f(-2) = 3 is f(x)=5x+13.

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By some estimates 80-90 percent of employee learning occurs via on the job training.

This is the term that is used to refer to the training that people would receive based on the fact that it is preparing them to have the competent skills that are useful for a particular job. It is one of the ways that employers help to get their employees ready for the task at hand.

It has been reported from available data that on the job training is a great component of employee learning.

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The triangle is a scalene triangle.

The measures of the three angles of a triangle are x, x+10, and 2x-6. What type of triangle must it be? The sum of the measures of the three angles in a triangle is 180 degrees, which means that:

   x + x + 10 + 2x - 6 = 180

This simplifies to,

   4x + 4 = 180,

   or 4x = 176, or x = 44

Once we have found x, we can now find the measures of the three angles of the triangle: the first angle is x, which is 44°, the second angle is x+10, which is 54°; and the third angle is 2x-6; which is 82°. A scalene triangle is a triangle with all sides and angles of unequal lengths. Since none of the angles has the same measure, the triangle is scalene. The correct answer is option C. Scalene Triangle.

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The total number of clients with a BMI of 25.9 or higher is therefore equal to 1 * 2.6 + 3 * 2

The total amount of money she would need to give in discounts next month can be found by calculating the total number of clients with a BMI of 25.9 or higher. To calculate this, the frequencies of each BMI range need to be multiplied by the width of the corresponding bar. The total amount of money she would need to give in discounts is then equal to the total number of clients with a BMI of 25.9 or higher multiplied by $50.

Using the histogram, the number of clients in each BMI range are: 18.1-20.7 (1), 20.7-23.3 (3), 23.3-25.9 (5), 25.9-28.5 (2), 28.5-31.1 (1).

The width of each bar is: 18.1-20.7 (2.6), 20.7-23.3 (2.6), 23.3-25.9 (2.6), 25.9-28.5 (2.6), 28.5-31.1 (2.6).

The total number of clients with a BMI of 25.9 or higher is therefore equal to 1 * 2.6 + 3 * 2

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