Can someone pls help me I’m really struggling

Answer: the answer to this is true

Answer:

Step-by-step explanation:

just sum all the sides

2 + 5 + 3 + 3 + 9 + 3 + 4 +5 =

34 cm =

Answer:

Step-by-step explanation:

perimeter = distance round a figure  

so, you will need to add;

2+(5*2)+(3*2)+9+4= 34 cm

 NB:we have multiplied 5 and 3 by2 each because we are considering the other side of the figure

There are four significant figures in the number 1.032.

Significant figures are the digits in a number that carry meaningful information about its precision. To determine the significant figures in a number, follow these rules:

Non-zero digits are always significant. In this case, the digits 1, 0, 3, and 2 are non-zero.

Zeroes between non-zero digits are significant. In this case, the zero between 1 and 3 is significant.

Leading zeroes (zeros before the first non-zero digit) are not significant. In this case, there are no leading zeroes.

Trailing zeroes (zeros after the last non-zero digit) are significant only if there is a decimal point present. In this case, there is a trailing zero after the 2, and since there is a decimal point, it is significant.

By applying these rules, we find that the number 1.032 has four significant figures.

The number 1.032 has four significant figures.

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Answer:39?

Step-by-step explanation:

Step-by-step explanation:

The slope of line q is 1 since the coefficient of x is 1. Since line r is perpendicular to line q, its slope will be the negative reciprocal of the slope of line q. Thus, the slope of line r will be -1.

Now we can use the point-slope form of the equation of a line to find the equation of line r. We know that line r passes through the point (8, -7), so we can write: y - (-7) = -1(x - 8)

Simplifying this equation, we get: y + 7 = -x + 8

Subtracting 7 from both sides, we get: y = -x + 1

So the equation of line r in slope-intercept form is y = -x + 1. The coefficients of x and the constant term are already integers, so we don't need to simplify them further.....

Answer:

i dont know sry for the bother

Step-by-step explanation:

Answer:

A.

Step-by-step explanation:

that's the only graph that actually matches the coordinates

The equation of the circle is (x+3)^2 + (y+1)^2 = 13.

The center of the circle is the point of tangency, which is (-3, -2). The radius of the circle is the distance between the center and one of the points on the circle, which is (0, -1). The distance between (-3, -2) and (0, -1) is 5, so the radius of the circle is 5. The equation of the circle is then (x - (-3))^2 + (y - (-2))^2 = 5^2 = 25. This simplifies to (x+3)^2 + (y+1)^2 = 13.

The center of the circle is the point of tangency, which is found by solving the equation of the tangent line and the equation of the circle. In this case, the equation of the tangent line is 2x - y + 4 = 0. We can solve this equation for y to get y = 2x + 4. This is the equation of the line tangent to the circle at the point of tangency.

The radius of the circle is the distance between the center and one of the points on the circle. In this case, we can use the point (0, -1) to find the radius. The distance between (-3, -2) and (0, -1) is 5, so the radius of the circle is 5.

The equation of the circle is then (x - (-3))^2 + (y - (-2))^2 = 5^2 = 25. This simplifies to (x+3)^2 + (y+1)^2 = 13.

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Step-by-step explanation:

Let the unknown number is x. So, we can write the equation like this.

\( ? \div \frac{1}{2} = \frac{1}{5} \times ?\)

\(x \div \frac{1}{2} = \frac{1}{5} \times x\)

\(x \times \frac{2}{1} = \frac{x}{5} \)

\(2x = \frac{x}{5} \)

\( \: \)

—Now, find the value of x.

\(2x = \frac{x}{5} \)

\(5 \times2x = x\)

\(10x = x\)

\(10x - x = 0\)

\(9x = 0\)

\(x = \frac{0}{9} \)

\(x = 0\) IS THE ANSWER

Step-by-step explanation:

\(□ \div \frac{1}{2} = \frac{1}{5} \times □\)

\(x \div \frac{1}{2} = \frac{1}{5} \times x\)

\( \frac{ \frac{x}{1} }{2} = \frac{1}{5} x\)

\( \frac{x}{2} = \frac{1}{5} x\)

\( \frac{x}{2} = \frac{1x}{5} \)

\( \frac{x}{2} = \frac{x}{5} \)

\(10 \times \frac{x}{2} = 10 \times \frac{x}{5} \)

\(5x = 2x\)

\(5x - 2x = 2x - 2x\)

\(3x = 0\)

\( \frac{3x}{3} = \frac{0}{3} \)

\(x = 0\)

The answer is 0

Step-by-step explanation:

Slope = y2 - y1 divided by x2 - x1

Lets make (3,5) as 2, and (6,1) as 1

Slope = 5 - 1 divided by 3 - 6

Slope = -4/3

Point Slope Form: (y - y1) = m(x - x1)

Lets use point (3,5)

(y - 5) = m(x - 3)

m is the slope and we know that the slope is -4/3 so...

(y - 5) = -4/3(x - 3): Point Slope Form Answer

Slope-Intercept Form: y = mx + b

m is the slope and b is the y-intercept

We know that the slope is -4/3

y = -4/3x + b

You can use any of the 2 points and plug it into the equation above to solve for b. So lets use point (3,5)

5 = -4/3(3) + b

5 = -4 + b

b = 9, now plug it back into y = -4/3x + b

y = -4/3x + 9: Slope-Intercept Answer

The result is not statistically significant.

To test the hypothesis is the mean SAT score is less than 1520 at 5% significance level.

The null hypothesis is

H₀ : μ ≥ 1520

The alternative hypothesis is

Hₐ : μ ≤ 1520

then the test statistic is,

t = (x - μ)/(s/√n)

 = (1501 - 1520)/(53/√20)

t = - 1.603

The t-test statistic is - 1.603.

Degree of freedom n - 1 = 20 - 1 = 19

Hence the t-critical value is -1.792.

The conclusion is that the t value corresponds to sample statistics is not fall in the critical region, so the null hypothesis is not rejected at 5% level of significance. There is insignificance evidence indicates that the mean SAT score is less than 1520.

The result is not statistically significant.

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Solving a system by graphing not be the best way to solve it as sometimes it is too time-consuming, and also we cannot solve complex equations with large numbers easily by this.

Solving systems by graphing can be a useful tool, but it is not always the best way to solve a system. Graphs can be difficult to interpret, and it can be difficult to determine if a solution exists based on the graph alone.

Additionally, graphing systems may not be the most efficient way to solve a system, as the process can be time-consuming and require a lot of calculations for larger systems.

Finally, graphing systems can be difficult for systems with large numbers of variables or complex equations, as it can be difficult to accurately draw a graph for such systems.

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\(\textit{equation of a circle}\\\\ (x- h)^2+(y- k)^2= r^2 \hspace{5em}\stackrel{center}{(\underset{h}{3}~~,~~\underset{k}{1})} \qquad \stackrel{radius}{\underset{r}{2}} \\\\[-0.35em] ~\dotfill\\\\( ~~ x - 3 ~~ )^2 ~~ + ~~ ( ~~ y-1 ~~ )^2~~ = ~~2^2\implies (x -3)^2 + (y -1)^2 = 4 \\\\\\ (x^2-6x+9)+(y^2-2y+1)=4\implies x^2-6x+y^2-2y+10=4 \\\\\\ ~\hfill~ {\Large \begin{array}{llll} x^2-6x+y^2-2y+6=0 \end{array}} ~\hfill~\)

Using the given ratio we will get that:

We know that there are a total of 210 points to be divided.

Gerardo gets 4 fails

Rubén gets 6 fails.

Sara gets 12 fails.

Then we have the ratio 4 : 6 : 12

The total of that is 4 + 6 + 12 = 22 fails.

Then; Gerardo gets (4/22) of the points:

G = (4/22)*210 = 38

Ruben gets (6/22) of the points:

R = (6/22)*210 = 57

Sara gets (12/22) of the points:

S = (12/22)*210 = 115

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The equation that represents the amount of discount offered (d) on an item whose usual price is p d = 0.15p.

The discount on 80 pounds will be 12 pounds.

From the information given, Dominic is shopping at a store that is offering a discount of 15 percent off the usual price of any item.

Let the price of the item be illustrated as p.

Since there's a 15% off, this will be:

= p - (15% × p)

= p - 0.15p

= 0.85p

The discount is 0.15p

The discount on 80 pounds will be:

= 0.15 × 80

= 12

The discount is 12 pounds.

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Answer:

He was gone for 36 minutes

Step-by-step explanation:

Sorry if wrong

Answer:

N+1

Step-by-step explanation:

It begins with = 2

then n+1=3

then n+2=4 and so on it is n+1

Answer:

Yes

Step-by-step explanation:

The area of a square is equal to the length squared.

So, the length of one side of the original floor is √400 which equals 20.

If you increase the length by 1, the area of the dance floor is 21 squared.

21 * 21 is certainly a rational number.

Answer:

Step-by-step explanation:

I think so, yes.

The area of a square is A = s*s where s is the length of the side

s^2 = 400

sqrt(s^2) = sqrt(400)

s = 20

If you increase each dimension by one foot you get 21 * 21 for the area of the new ballroom.

The result is rational. That's because the square root was rational when you found 20.

Area = 21 * 21 = 441 which is rational.

Answer:

x=−5

y=−2

Step-by-step explanation:

{3x+4y=-23}{x=3y+1}

x=−5

y=−2

Answer:
D

Step-by-step explanation: 5 are crossed rows by 3 and then 7 by 5 are shaded in and than is 2 different numbers in together multiplied equals 1.500 which is D

Answer: 3/7 + 2/7 = 5/7 ≅ 0.7142857

The given statement " The allowable range for an objective function coefficient assumes that the original estimates for all the other coefficients are completely accurate so that this is the only one whose true value may differ from its original estimate " is false because the allowable range for an objective function coefficient assumes that the original estimates for other coefficients are approximately correct

The allowable range for an objective function coefficient assumes that the original estimates for all the other coefficients are approximately correct, but not necessarily completely accurate. The allowable range takes into account the potential variability or uncertainty in the estimated values of the other coefficients, as well as the impact of any errors or discrepancies in the data used to estimate the model.

Therefore, the allowable range provides a range of values within which the objective function coefficient can vary while still producing a valid and useful model. It does not assume that the other coefficients are completely accurate or that this is the only coefficient whose true value may differ from its original estimate.

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The equation of the tangent plane to the surface at the point (4, -4, -144) is -8x + 64y - z - 256 = 0.

To find the equation of the tangent plane to the surface at the point (4, -4, -144), we need to find the partial derivatives of z with respect to x and y at that point:

∂z/∂x = 2x + 4y

∂z/∂y = 4x - 12y

Substituting x=4 and y=-4 into these expressions, we get:

∂z/∂x = 2(4) + 4(-4) = -8

∂z/∂y = 4(4) - 12(-4) = 64

So the normal vector to the tangent plane at the point (4, -4, -144) is <∂z/∂x, ∂z/∂y, -1> = <-8, 64, -1>. Therefore, the equation of the tangent plane is:

-8(x - 4) + 64(y + 4) - (z + 144) = 0

Simplifying this equation, we get:

-8x + 64y - z - 256 = 0

So the equation of the tangent plane to the surface at the point (4, -4, -144) is -8x + 64y - z - 256 = 0.

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Answer:

2

Step-by-step explanation:

a_1 = 5

a_6 = 160

a_5 = a_1 * q^5

160 = 5q^5

32 = q^5

q = 2

In geometric sequence it is common to use q instead of d. D is used commonly in arithmetic sequence.

Answer:

d = 80

Step-by-step explanation:

The nth term of a geometric sequence is

\(a_{n}\) = a₁ \((r)^{n-1}\)

where a₁ is the first term and r the common ratio

Here a₁ = 5 and a₆ = 160 , then

5 × \(r^{5}\) = 160 ( divide both sides by 5 )

\(r^{5}\) = 32 ( take 5th root of both sides )

r = \(\sqrt[5]{32}\) = 2

Now d is the 5th term , so

a₅ = d = 5 × \(2^{4}\) = 5 × 16 = 80

The value of the given expression [\(87^3+ 13^3/87^2 -87 * 13 + 13^2\)] by simplifying the numerator and denominator using suitable identities is 100.

We will first calculate the numerator:

As  (\(a^3\) + \(b^3\)) = (a + b)(\(a^2\) - ab + \(b^2\)) :

\(87^3\) + \(13^3\) = (87 + 13)(\(87^2\) - \(87 * 13\) + \(13^2\))

= 100(\(87^2\) - 87 * 13 + \(13^2\))

Now, calculate the denominator:

\(87^2 - 87 * 13 + 13^2\)

As,(\(a^2 -2ab +b^2\)) =\((a - b)^2\):

\(87^2 - 87 * 13 + 13^2 = (87 - 13)^2\)

\(= 74^2\)

So by solving the equation further:

\((87^3+13^3) / (87^2- 87 * 13+13^2) = 100*(87^2- 87 *13 + 13^2)/(87^2 - 87 * 13 + 13^2)\)

As we can see the numerator and denominator are the same expressions (\(87^2 - 87 * 13 + 13^2\)). so, they cancel each other:

\((87^3 + 13^3) / (87^2 - 87 * 13 + 13^2) = 100\)

So, the value of the given expression is 100.

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In triangle def, if m∠d is (2x)°, m∠e is (3x − 2)°, and m∠f is (x + 8)°, then the value of x is 29.

A triangle is a three-sided polygon that consists of three edges and three vertices.

Triangle is DEF

if m∠d is (2x)°, m∠e is (3x − 2)°, and m∠f is (x 8)°

We need to find the value of x.

We know that the sum of three angles of triangle is 180 degrees

m∠d + m∠e + m∠f=180°

2x+3x-2+x+8= 180°

6x+6=180

Subtract 6 on both sides

6x=174

Divide by 6 on both sides.

x=174/6

x=29

Hence, the value of x is 29.

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Answer:

A. 8.27*10^4

D. 82,700

Step-by-step explanation:

This value represents the present worth below which the probability is 0.5, indicating a negative present worth.

To estimate the probability that the present worth is negative using the NORM.INV function in Excel,

we need to calculate the present worth of the project and then determine the corresponding probability using the normal distribution.

The present worth of the project can be calculated by finding the sum of the present values of the annual receipts over the 10-year period, minus the initial investment. The present value of each annual receipt can be calculated by discounting it back to the present using the minimum attractive rate of return (MARR).

Using the given information, the present value of the initial investment is $10,000. The present value of each annual receipt is calculated by dividing the expected return of $1,800 by \((1+MARR)^t\),

where t is the year. We then sum up these present values for each year.

We can use the NORM.INV function in Excel to estimate the probability of a negative present worth. The function requires the probability value, mean, and standard deviation as inputs.

Since we have a mean and standard deviation for the present worth,

we can calculate the corresponding probability of a negative present worth using NORM.INV.

This value represents the present worth below which the probability is 0.5. By using the NORM.INV function,

we can estimate the probability that the present worth is negative based on the given data and assumptions.

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