Answer pls. question in photo

A) \(7x(-5)\)

A multiplicação de um numero positivo por um numero negativo resulta em um numero negativo: \((+) x (-)=(-)\)

\((7x5)\)

Multiplique os valores

\(-35\)

resposta para  A: \(-35\)

B)\((-9)x(-8)\)

A multiplicação dois números negativos resulta em um numero positivo : \((-)x(-)=(+)\)

\(9 x 8\)

Multiplique os valores

\(72\)

Resposta para B :\(72\)

C)\((-15) : 5\)

A divisão de um numero negativo por um positivo resulta em um numero negativo: \((-):(+)=(-)\)

\(-(15:5)\)

Divida os números

\(-3\)

Resposta para C: \(-3\)

D) \(125 : 25\)

Divida os números

\(5\)

Resposta para D: \(5\)

POR FAVOR ME MARCA BRAINLIEST

This rule is applied to triangles to determine the unknown sides and angles. The value of x from the diagram is 11.78m

This rule is applied to triangles to determine the unknown sides and angles.

Given the following parameter

Opposite = 5m

Adjacent = x

angle = 23 degrees

According to the theorem of tangents

tan23 = opposite/adjacent

tan23 = 5/x
x = 5/tan23

x = 11.78m

Hence the value of x from the diagram is 11.78m

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Solution

Therefore, the asnwer is

Answer:

B

Step-by-step explanation:

Answer:

I belive is option B

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

gm=cm+rg

gm-cm=rg

m(g-c)/g-c = rg/g-c

m=r g/g-c

     -3m=4m-15

-3m-4m=-15

-7m=-15

-15/-7m

= -2.14

-15/-3-4= 2.14

Answer:

The answer is C. I just got it right

Step-by-step explanation:

Answer:

x

=

−

8

−

√

13

3

,

−

8

+

√

13

3

I dont know why the answer is spacing out like this

The value illustrated by the weight of gravel in a pile is 120 lb. is a continuous data set.

It should be noted that a continuous data set is the quantitative data set that represents a scale of measurement which can consist of numbers other than whole numbers, like decimals and fractions.

It should be noted that continuous data sets would consist of values like height, weight, length, temperature, etc.

Therefore, the value illustrated by the weight of gravel in a pile is 120 lb. is a continuous data set.

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Answer:

122 mm

Step-by-step explanation:

P= 2(l + w)

P= 2(26 + 35) ...........plug in values

P= 52 + 70 .................distribute

P = 122...........................add

Answer:

1.  Y = -1/4x + 1

3. Y = 2/5x + 1

5. Y = 4/5x + 5

7. Y = -x + 5

9. Y = -5/2x - 16

Step-by-step explanation:

Find the slope using the formula

Use the slope and one of the points to find the y-intercept

Once you know the value for m and the value for b, you can plug these into the slope-intercept form of a line (y = mx + b) to get the equation for the line.

Answer:

  The area of ∆ABC is 50 square units.

Step-by-step explanation:

You want the area of right triangle ABC with coordinates A(-9, 10), B(7, -2), and C(4, -6).

The vector BC can be found as ...

  C -B = (4, -6) -(7, -2) = (4 -7, -6 -(-2)) = (-3, -4)

The vector BA can be found as ...

  A -B = (-9, 10) -(7, -2) = (-9 -7, 10 -(-2)) = (-16, 12)

The area of the triangle will be half the absolute value of the "cross product" of these vectors:

  1/2·|BC×BA| = 1/2|(-3(12) -(-4(-16))) = 1/2|-36 -64| = 50

The area of ∆ABC is 50 square units.

__

Additional comment

This "cross product" of the 2-dimensional vectors is the determinant of the 2×2 matrix of their components. This method of finding triangle area works with any triangles whose vertex coordinates are known.

  \(\left|\begin{array}{cc}a&b\\c&d\end{array}\right|=ad-bc\)

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I am very unsure what your question is, but the simple tip is to divide it by two each year as it is decreasing by a half..

To find the number of copies sold in subsequent years, you can use the formula:

N = N0 * (1/2)^t

where N is the number of copies sold in a given year, N0 is the initial number of copies sold (in this case, 600,000), t is the number of years since the book was released.

For example, to find the number of copies sold in the second year after the book was released:

N = 600,000 * (1/2)^1

N = 300,000

So, 300,000 copies were sold in the second year. To find the number of copies sold in subsequent years, you can continue to plug in values of t and solve for N.

The solution to the system of equations is x = 1 and y = 1.

To solve the system of equations using substitution, we start by solving one equation for one variable and substituting it into the other equation. Given the system of equations:

1) 4x + 3y = 7

2) 3x + 5y = 8

We can solve equation 1 for x:

4x = 7 - 3y

x = (7 - 3y)/4

Now, substitute this expression for x into equation 2:

3((7 - 3y)/4) + 5y = 8

Simplify the equation:

(21 - 9y)/4 + 5y = 8

Multiply both sides by 4 to eliminate the fraction:

21 - 9y + 20y = 32

Combine like terms:

11y = 11

Divide both sides by 11:

y = 1

Now, substitute the value of y back into equation 1 to solve for x:

4x + 3(1) = 7

4x + 3 = 7

4x = 7 - 3

4x = 4

x = 1

Therefore, the solution to the system of equations is x = 1 and y = 1.

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A and B are 2 x 2 with columns a1, a2, and b1, b2, respectively. AB = [a1 b1 a2 b2].

Each column of AB is a linear combination of the columns of B using weights from the corresponding column of A.So, we have:AB=⎡⎣⎢⎢a1a2⎤⎦⎥⎥[b1b2]=[a1b1+a2b2a1b1+a2b2]The order of AB is 2 × 2.Therefore, the blank will be filled by "2 × 2". Hence, the answer is 2 × 2.

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The value or measure of the rhombus can be computed as the square root of 10x² + 58x + 82.

A rhombus is a type of parallelogram in which all sides have equal lengths. The opposite sides of a rhombus are parallel, while the opposite angles are equal in measure. Let's solve for the value or measure of a rhombus and ACP = 3x-1 and PC = x+9. The formula for a rhombus in a quadrilateral is AC² = AB² + BC² / 2 - diagonals.

In the given quadrilateral, AB = AD and BC = CD. Hence AC = (AB)² + (BC)² / 2. By substituting the values given, we have AC = (3x - 1) + (x + 9) = 4x + 8. Now, we can find AC² = AB² + BC² / 2 - diagonals, which will be AC² = 2AB² + 2BC² / 2 => AC² = AB² + BC².

Finally, substituting the values given, we have AC² = (3x - 1)² + (x + 9)² = 10x² + 58x + 82.

Hence A C is the square root of 10x² + 58x + 82.

Therefore, the value or measure of the rhombus can be computed as the square root of 10x² + 58x + 82.

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Answer:

Surface Area  = 4928 ft^2

Step-by-step explanation:

Easy way -

First find the area of each face i.e.

56 * 20 =  1120

65 * 20 = 1300

33 * 20 = 660

2 * (1/2 * 56 * 33) = 1848

Total = 4928 ft^2

Answer:

$24,582

Step-by-step explanation:

E = 2.75q + $24,582

The expense equation above has the general relation :

Expense = [(variable cost * number of units) + fixed cost]

The fixed cost incurred is not dependent on the number of units purchased or produced and as such is usually regarded as a constant in the formula.

Thus, the fixed cost in the expense equation is thus : $24,582

The 90% confidence interval for the difference in means is approximately (-7.603, -4.397) centimeters per second.

To construct a confidence interval for the difference in means, we can use the formula:

CI = (x₁ - x₂) ± t_critical ×√((s₁²/n₁) + (s₂²/n₂))

where:

CI is the confidence interval

x₁ and x₂ are the sample means of the burning rates

s₁ and s₂ are the standard deviations of the burning rates

n₁ and n₂ are the sample sizes

t_critical is the critical value based on the desired confidence level and degrees of freedom.

Given:

x₁ = 18 cm/s

x₂ = 24 cm/s

s₁ = s₂ = 3 cm/s

n₁ = n₂ = 20

a = 0.10 (10% significance level)

First, let's calculate the critical value, t_critical, using the t-distribution table or a statistical calculator. Since both samples have the same size, we can use the pooled standard deviation:

s_pooled = √(((n₁ - 1) ×s₁² + (n₂ - 1) ×s₂²) / (n₁ + n₂ - 2))

t_critical = t(1 - a/2, n₁ + n₂ - 2)

Now we can substitute the values into the formula:

s_pooled = √(((20 - 1)× 3² + (20 - 1) ×3²) / (20 + 20 - 2)) = √(18)

t_critical = t(1 - 0.10/2, 20 + 20 - 2) = t(0.95, 38)

Using the t-distribution table or a calculator, t(0.95, 38) is approximately 1.686.

Now we can calculate the confidence interval:

CI = (18 - 24) ± 1.686 ×√((3²/20) + (3²/20))

= -6 ± 1.686 ×√(0.45 + 0.45)

= -6 ± 1.686 × √(0.9)

Simplifying further:

CI = -6 ± 1.686 × 0.9487

= -6 ± 1.603

Therefore, the 90% confidence interval for the difference in means is approximately (-7.603, -4.397) centimeters per second.

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Ruby Corporation's cost of equity is 13 percent.

To calculate Ruby Corporation's cost of equity, we will use the Capital Asset Pricing Model (CAPM) formula which includes the terms beta, risk-free rate, and expected return on the market.

The CAPM formula is:

Cost of Equity = Risk-Free Rate + Beta * (Expected Return on Market - Risk-Free Rate)

Given the information in your question:

Beta = 1.5

Risk-Free Rate = 4 percent (0.04)

Expected Return on Market = 10 percent (0.10)

Now, let's plug these values into the CAPM formula:

Cost of Equity = 0.04 + 1.5 * (0.10 - 0.04)

Cost of Equity = 0.04 + 1.5 * 0.06

Cost of Equity = 0.04 + 0.09

Cost of Equity = 0.13

So, the cost of equity is 13 percent.

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Answer:The answer will be 35ft

Step-by-step explanation:

One way that you can answer this is by using sin law. You will put the length of a side on top and the corresponding angle that faces towards that side at the bottom of a fraction. So for this one it will be 30/sin(70) = x/sin(90) The 90 comes from the bottom of the building with the ground. And the side the angle faces is the ladder. After that you put 30sin(90)/sin(70) to find x. And you get 34.655 which rounds to 35 ft.

Answer:

creo q es 138 x 8 y la respuesta dividele para 90

The equation for the relationship between the weight (in kilograms) of the wrestler after x months is y = 6x + 90.

We have,

To complete the equation for the relationship between weight and the number of months, we can use the information given.

We know that after 8 months, the wrestler weighed 138 kilograms.

We also know that the wrestler started at 90 kilograms.

Let's assume that the weight gain is constant over the 8-month period.

The wrestler gained (138 - 90) kilograms in 8 months, which is 48 kilograms.

Therefore, the weight gain per month is 48 kilograms / 8 months

= 6 kilograms per month.

Now, we can express the relationship between weight (y) and the number of months (x) using the equation:

y = mx + b

where m is the slope (rate of weight gain per month) and b is the initial weight.

In this case, the equation becomes:

y = 6x + 90

Thus,

The equation for the relationship between the weight (in kilograms) of the wrestler after x months is y = 6x + 90.

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The complete question:

A young sumo wrestler decided to start a special high-protein diet in order to gain weight quickly and at a constant rate. After 8 months I weighed 138 kilograms. He started at 90 kilograms. Let y be the weight (in kilograms) of the wrestler after x months. Complete the equation for the relationship between weight and number of months.

Answer:

see explanation

Step-by-step explanation:

Using the chain rule

Given

y = f(g(x)), then

\(\frac{dy}{dx}\) = f'(g(x))  × g'(x) ← chain rule

and the standard derivatives

\(\frac{d}{dx}\) (\(log_{a}\) x ) = \(\frac{1}{xlna}\) , \(\frac{d}{dx}\)(lnx) = \(\frac{1}{x}\)

(a)

Given

y = \(log_{a}\)\(\sqrt{(1+x)}\)

\(\frac{dy}{dx}\) = \(\frac{1}{lna\sqrt{(1+x)} }\) × \(\frac{d}{dx}\) (\((1+x)^{\frac{1}{2} }\)

   = \(\frac{1}{lna\sqrt{(1+x)} }\) × \(\frac{1}{2}\) \((1+x)^{-\frac{1}{2} }\) × \(\frac{d}{dx}\) (1 + x)

   = \(\frac{1}{lna\sqrt{(1+x)} }\) × \(\frac{1}{2\sqrt{(1+x)} }\) × 1

   = \(\frac{1}{2lna(1+x)}\)

   = \(\frac{1}{(1+x)lna^2}\)

(b)

Given

y = ln sinx

\(\frac{dy}{dx}\) = \(\frac{1}{sinx}\) × \(\frac{d}{dx}\)(sinx)

   = \(\frac{1}{sinx}\) × cosx

   = \(\frac{cosx}{sinx}\)

   = cotx

Answer:

1,960,000 square feet

Step-by-step explanation:

First let's round 679 to the nearest hundred. To do this we look at the 10s digit. If it is 5 or greater, we round up to 700 (because it is past halfway between 600 and 700), and is not we round down back to 600.

The 10s digit of 679 is 7, which is greater than 5. Therefore 679 rounded to the nearest hundred is 700.

Now let's look at 2828. The 10s digit here is 2, which is smaller than 5, therefore we round back down to 2800, which is closer than 2900.

Now we have 700 and 2800. To find the area, (assuming the yard is a rectangle) we multiply the length by the width together (these two values). 700x2800 = 1,960,000 square feet.

Hope this helped!

The correct answer is E. None of these. There are no fifths in the decimal number 4.8. The number 4.8 does not have a fractional representation in terms of fifths, as it is not divisible evenly by 1/5.

To determine how many fifths are there in a given number, we need to check if the number is divisible evenly by 1/5. In other words, we need to see if the number can be expressed as a fraction with a denominator of 5.

In the case of 4.8, it cannot be written as a fraction with a denominator of 5. When expressed as a fraction, 4.8 is equivalent to 48/10. However, 48/10 is not divisible evenly by 1/5 because the denominator is 10, not 5.

Therefore, there are no fifths in 4.8, and the correct answer is E. None of these.

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Which of the following is an accurate definition for the power of a statistical test is C. The power of a statistical test refers to the probability of rejecting a false null hypothesis. This means that the test is able to correctly identify when there is a significant difference between two groups or conditions.

statistical tests are used to determine whether the results of an experiment are likely due to chance or whether there is a real effect. The null hypothesis states that there is no significant difference, while the alternative hypothesis states that there is. The power of a statistical test refers to the ability of the test to correctly reject the null hypothesis when it is false, and thus support the alternative hypothesis.

, the power of a statistical test is the probability of correctly rejecting a false null hypothesis, which indicates that there is a significant difference between two groups or conditions.

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Answer:

first option

Step-by-step explanation:

In a parallelogram consecutive angle are supplementary, sum to 180, so

2a + 122 = 180 ( subtract 122 from both sides )

2a = 58 ( divide both sides by 2 )

a = 29

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

In a parallelogram the opposite sides are congruent, then

b + 6 = 10 ( subtract 6 from both sides )

b = 4

Answer:

200 cm^3

Step-by-step explanation:

See attached image.

The proof of the given statement "there do not exist positive integers a and n such that a^2 3 = 3^n" is stated below.

Taking the square root of both sides gives:

a = 3^(m - 1/2)

Since m is a positive integer, (m - 1/2) is not an integer. Therefore, a cannot be an integer, which contradicts our assumption. Hence, there do not exist positive integers a and n such that a^2 * 3 = 3^n.

To prove that there do not exist positive integers a and n such that a^2 * 3 = 3^n, we will use proof by contradiction.

Assume that there exist positive integers a and n such that a^2 * 3 = 3^n. Then we can write:

a^2 = 3^(n-1)

Since 3 is a prime number, we know that any power of 3 is not a perfect square, except for 3^0 = 1. Thus, the equation above implies that a^2 is a power of 3 minus 1.

We can then write a^2 + 1 = 3^(n-1) + 1. Since a^2 is not divisible by 3, a^2 + 1 is not divisible by 3 either. Therefore, n must be even, so we can write n = 2m for some positive integer m.

Now, we have:

a^2 = 3^(2m - 1)

Taking the square root of both sides gives:

a = 3^(m - 1/2)

Since m is a positive integer, (m - 1/2) is not an integer.

Therefore, a cannot be an integer, which contradicts our assumption. Hence, there do not exist positive integers a and n such that a^2 * 3 = 3^n.

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Steph travels approximately 65 miles in total to and from work each week.

Distance refers to the amount of space between two objects or points, usually measured in units such as meters or miles. It can also refer to the extent of difference or separation between two ideas or concepts.

According to the given information :

We need to know the distance from Crosby to Speke via Bootle in order to calculate the total distance that Steph travels each week.

Assuming Steph travels by car, we can estimate the distance as follows:

From Crosby to Bootle: approximately 4 miles

From Bootle to Speke: approximately 9 miles

So the total distance that Steph travels to and from work each day is approximately 4 + 9 = 13 miles.

To find the total distance that Steph travels each week, we can simply multiply the daily distance by the number of days she works:

Total distance = 13 miles/day x 5 days/week

Total distance = 65 miles/week

Therefore, Steph travels approximately 65 miles in total to and from work each week.

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Answer:

slope = -5/1

y-intercept = (0, -34)

Step-by-step explanation:

slope m = change in y ÷ change in x

= (-9 - -4) ÷ (-5 - -6)

= -5 ÷ 1

= -5/1

y = mx + b  ⇒  y = -5x + b

substitute one of the points

-4 = (-5 x -6) + b

-4 = 30 + b

b = -34

Therefore, y-intercept = (0, -34)