I need help I have been stuck for an hour

Answer:

8.2 cm

Step-by-step explanation:

The given shows us that we will be using CAH from SOH CAH TOA where

cos theta = adjacent / hypotenuse

in this case it will be

. cos 47 = h / 12

we want h to be the subject so we will multiply both sides by 12

. h = cos 47 * 12

. h = 8.184

now all you have to do is round to 1d.p

. h = 8.2cm

Answer:

k = 52

Step-by-step explanation:

- 8 = \(\frac{k-4}{-6}\) ( multiply both sides by - 6 to clear the fraction )

48 = k - 4 ( add 4 to both sides )

52 = k

Answer: k=52

Step-by-step explanation:

-8= k-4/-6

multiply by -6

48=k-4

add 4 to both sides

k=52 :)

The correct statement is c. The Adjusted R-squared is a measure used in multiple regression analysis that is between 0 and 1. It is different from the R-squared value in simple linear regression.

The Adjusted R-squared can decrease if the addition of another X regressor does not sufficiently lower the sum of squared residuals (SSR) relative to the impact of increasing the number of predictors (k). It measures the proportion of the variance explained by the predictors, adjusted for the number of predictors and the sample size, rather than the ratio of the sum of squared residuals to the total sum of squares. It provides a measure of how well the regression model fits the data, and it ranges between 0 and 1. A value closer to 1 indicates that a higher proportion of the variance in the dependent variable is explained by the predictors.

Adding another X regressor to the multiple regression model can impact the Adjusted R-squared. If the additional regressor does not significantly contribute to reducing the sum of squared residuals (SSR) relative to the increase in the number of predictors (k), the Adjusted R-squared can decrease. This means that the added regressor does not improve the model's ability to explain the variance in the dependent variable adequately.

However, the Adjusted R-squared does not directly measure the ratio of the sum of squared residuals to the total sum of squares. Instead, it represents the proportion of the variance explained by the predictors, adjusted for the number of predictors and the sample size. It penalizes models with a large number of predictors that may overfit the data, thereby providing a more reliable measure of the model's goodness of fit.

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The angle between the ladder and the ground changes when the bottom of the ladder is 8 ft from the wall is -1/12 radians per second.

Denoting the distance in feet between the wall and the base of the ladder by x and the angle in radians between the ladder and the ground by y, it is noted;

cos(y) = x/10

which implies;

y = arccos(x/10)

Denoting time in seconds by t, it is further noted that;

\(\frac{dx}{dy} = \frac{dy}{dx} \frac{dx}{dt}\)  (chain rule)

Noting (using a standard table of derivatives for convenience)

\(\frac{dy}{dx}= -\frac{1}{\sqrt{1-(0.1x)^2} }(0.1)\) (also by chain rule)

The above equation changes as;

\(\frac{dy}{dx}= -\frac{0.1}{\sqrt{1-0.1x^2} }\)

It is noted from the question that in this particular system;

\(\frac{dx}{dt} = 0.5\)  feet per second

So (denoting the derivative as a function of x)

\(\frac{dy}{dt}(x)=\frac{dy}{dx} \frac{dx}{dt} = - \frac{0.05}{\sqrt{1-0.01x^2} }\)

At last;

\(\frac{dy}{dt}(8)=\frac{dy}{dx} \frac{dx}{dt} = - \frac{0.05}{\sqrt{1-0.01(64)} }\)

         = \(\frac{0.05}{\sqrt{1-0.64} }\)

         = \(\frac{-0.05}{\sqrt{0.36} }\)

         = -5/60

         = -1/12 radians per second

The angle between the ladder and the ground changes when the bottom of the ladder is 8 ft from the wall is -1/12 radians per second.

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The cost of one computer is £600 and the cost of one printer is £800.

Computing equipment is bought from a supplier. The cost of 5 Computers and 4 Printers is £6,600, and the cost of 4 Computers and 5 Printers is £6,000. Form two simultaneous equations and solve them to find the costs of a Computer and a Printer.

Let the cost of a computer be x and the cost of a printer be y.

Then, the two simultaneous equations are:5x + 4y = 6600 ---------------------- (1)

4x + 5y = 6000 ---------------------- (2)

Solving equations (1) and (2) simultaneously:x = 600y = 800

Therefore, the cost of a computer is £600 and the cost of a printer is £800..

:Therefore, the cost of one computer is £600 and the cost of one printer is £800.

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Answer:

Step-by-step explanation:x y = 4 x - y = 6 = get you some b1tc1es

Integers with a magnitude of 0 to 999999999999999 with a signed or unsigned variable prefix are considered to be numerical constants. Numerical constants include, for instance:  0, -13, 1300, 114567

In mathematics, a variable is a value that may be changed depending on the problem. The general letters x, y, and z are used in many mathematical formulae. In other words, a variable is a symbol used in equations to denote a number whose value is uncertain. Suppose x + 5 = 10. This uses the variable "x." In mathematics, a variable is a value that may be changed depending on the problem.

The following are the  invalid numeric constants

      1.2                    not an integer

       1                     not numeric

10000000000    too large

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The values of errors are found to be

(a) The absolute error = 3.1 m

(b) The relative error = 0.31 m

Given,

V = 10 m

V(approx) = 13.1 m

(A) To find absolute error

Absolute error = | Actual value - App. Value |

E = | V - V(approx) |

E = | V - V(approx) |

E = | 10 - 13.1 |

E = 3.1 m

Absolute error = 3.1 m

(B) To find the relative error

Relative error = | Absolute error / actual error |

n = | E / V |

E = 3.1 m

V = 10 m

n = | 3.1 / 10 |

n = 0.31 m

Relative error = 0.31 m

Therefore, the absolute error is 3.1 m and relative error is 0.31 m.

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[NOTE: THIS IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS: A scientist makes a measurement and gets a value of 13.1 m. The true value is 10.0 m. Calculate the absolute and relative error of the scientist's measurement. Round your answers to a reasonable number of decimal places. Also be sure your answers include any necessary symbols. Absolute error: relative error:]

The possible dimensions of the rectangle are 6 inches by 8 inches, and the answer is D).

What is the area of rectangle?

The area of a rectangle is calculated by multiplying the length of the rectangle by its width. That is:

Area of rectangle = length × width

A = l × w

where A represents the area of the rectangle, l represents its length, and w represents its width.

Let's assume the rectangle has length "L" and width "W". We know that the area of the rectangle is 48 sq. in., so:

L * W = 48

We also know that the perimeter of the rectangle is 28 in., so:

2L + 2W = 28

L + W = 14

Now we can use these two equations to solve for L and W. One approach is to use substitution:

L = 14 - W (from the second equation)

(14 - W) * W = 48 (substituting for L in the first equation)

14W - W² = 48

W² - 14W + 48 = 0

(W - 6)(W - 8) = 0

So the possible values for W are 6 and 8. If W is 6, then L must be 8:

6 * 8 = 48 (the area checks out)

2(6) + 2(8) = 28 (the perimeter checks out)

Therefore, the possible dimensions of the rectangle are 6 inches by 8 inches, and the answer is D).

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Line m passes through the point value of k is -1/3.

Now let us find the slope of the equation using the slope equation of line:

y = mx + b,

From the given slope let’s find y,

y-7= -3/2(x+4)

y-7= -3/2x - 6

y= -3/2x + 1

=-1 / (-3/2)

=2/3

As these two lines are perpendicular the product of the slopes is -1.

m= 2/3 , y=-1

Line m is given as  y=2/3 x +b

As the line m passes through the points

(-1, 4) and (5, k)

X=4,

To find b

-1 = 2/3 * 4+b

-1=8/3+b

b=-11/3

By substituting all the values in the formula we get value of k,

Line m : y=2/3*-11/3

When x=5

k=y=2/3*5-11/3

=10/3-11/3

=-1/3

K = -1/3

A perpendicular is a straight line that makes an angle of 90° with any other line. 90° is also known as a right angle and is marked through a little square among two perpendicular lines.

Hence, the value of k is -1/3. The two lines intersect at a right angle, and hence, are stated to be perpendicular to each other.

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Answer: k=8

Step-by-step explanation:

To find the value of k in the equation y-7=-3/2(x+4), we need to determine the slope of the line given by this equation.  

First, let's rewrite the equation in slope-intercept form (y = mx + b),

where m is the slope and b is the y-intercept:  

y - 7 = -3/2(x + 4) y - 7 = -3/2x - 6 y = -3/2x - 6 + 7 y = -3/2x + 1  

Comparing this equation with the general slope-intercept form, we can see that the slope (m) is -3/2.  

Since the line y - 7 = -3/2(x + 4) is perpendicular to line m, we know that the slopes of the two lines are negative reciprocals of each other.  

The negative reciprocal of -3/2 is 2/3.  

Therefore, the slope of line m is 2/3.

We know that line m passes through the points (-1, 4) and (5, k). Using the slope-intercept form, we can write the equation of line m as:

y = 2/3x + b  Substituting the coordinates (-1, 4) into the equation,

we can solve for the y-intercept (b):  4 = 2/3(-1) + b 4 = -2/3 + b 4 + 2/3 = b 12/3 + 2/3 = b 14/3 = b  Therefore, the equation of line m is:  y = 2/3x + 14/3  Substituting the x-coordinate 5 and solving for k:  k = 2/3(5) + 14/3 k = 10/3 + 14/3 k = 24/3 k = 8  Hence, the value of k is 8.

The pairwise comparisons that need to be made for this anova result will be b.3

In order to determine the number of pairwise comparisons needed for a one-way between-subjects ANOVA with three groups, we can use the formula:

N = (k * (k-1)) / 2

Where N represents the number of pairwise comparisons and k represents the number of groups. In this case, k = 3.

Plugging in the values:

N = (3 * (3-1)) / 2

N = (3 * 2) / 2

N = 6 / 2

N = 3

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Answer:

16 ft.

Step-by-step explanation:

Distance Formula:

A = (2,2)

B = (12,14)

So, sqrt(12^2 + 10^2) = 16 ft.

This is the same for B to C.

So, 16 ft.

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The probability that a set of all bulbs work is 0.88.

The total probability rule (also known as the Law of Total Probability) divides probability calculations into discrete steps.

Now, as per the question;

The total number of bulbs be 120 and each bulb is working as independent event.

The reliability of each bulb is 99.9% = 0.999

Let 'p' the probability the bulb will work.

The probability that all will work = p¹²⁰

The probability that all will work = (0.999)¹²⁰ = 0.886

Thus, the probability that all bulb will work is 88.6%.

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Answer:

p = 6.95 + (0.95 × t)

Step-by-step explanation:

A function rule explains how to convert an input value (x) into an output value (y) for any given function.

To get the total price (p) we need to add the cost of the pizza itself, and add each topping. The part of the equation (0.95 × t) can solve for the price of each topping, so we add that on.

a. Research scenario: A dietician is interested in whether American Indians consume more red meat than White Americans.Research hypothesis: Native Americans consume more red meat than White Americans.

Null hypothesis: Native Americans do not consume more red meat than White Americans.Testing of null hypothesis:As the sample size is more than 30 and standard deviation of the population is not known, we will use a z-test. The formula for the z-score is as follows .Since the calculated value of z (2.5) is greater than the critical value of z (1.645), we reject the null hypothesis and conclude that Native Americans consume more red meat than White Americans.b. Research scenario: A health disparities psychologist is interested in whether people with or without Diabetes have higher levels of fatalism.

Research hypothesis: People with Diabetes have higher levels of fatalism than those without Diabetes.Null hypothesis: There is no difference in the level of fatalism between people with Diabetes and those without.Testing of null hypothesis:As the sample size is more than 30 and standard deviation of the population is not known, we will use a z-test. The formula for the z-score is as follows is greater than the critical value of z (1.645), we reject the null hypothesis and conclude that people with Diabetes have higher levels of fatalism than those without Diabetes.

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Answer:

2,8

Step-by-step explanation:

the upper arrow goes down just like the other one so which every number you see its on go to that number and look up im at explaining but that is the answer for the 1st page

Answer:

1760

Step-by-step explanation:

10 x 16 x 11

160 x 11 = 1760

Answer:

-63b^6

Step-by-step explanation:

Answer:    −63b6

Step-by-step explanation: Its the right answar.

Answer:

volume = ⅓×π×4²×9 = 48π sq. meters

Answer:

the second one

Step-by-step explanation:

Answer:

the original price was $53.33

Step-by-step explanation:

$x ---- 100%

$40 ------- 75% (this is because 25% of it's just 75% of the actual price)

\(75\cdot x = 100\cdot 40\\\\75x = 4000\\\\x=53.33\)

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

Work Shown:

x = original price

25% = 25/100 = 0.25

25% of x = 0.25x = discount, or amount saved

final price = (original price) - (discount)

final price = (x) - (0.25x)

final price = 0.75x

0.75x = 40

x = 40/0.75

x = 53.333333

x = 53.33

The original price is $53.33

The discount, or amount saved, is 0.25*x = 0.25*53.33 = 13.3325 = 13.33 dollars.

This means the sale price is 53.33 - 13.33 = 40

We can also see this through computing 0.75*x = 0.75*53.33 = 39.9975 = 40, which matches with the given sale price.

Note how I'm rounding to the nearest penny when needed.

Answer:

incomplete question friend

well, keeping in mind that twin sides stemming from the same "vertex" make twin angles at the "base", Check the picture below.

Answer:

6

Step-by-step explanation:

Answer:

3 and 10

Step-by-step explanation:

The difference is 7 and sum is 13

Hope that helps :)

G for bag A could also be written as 1g

The equation could then be written as 1g - 0.40g, which if you subtract can be solved as 0.60g

The answer is 0.60g

Answer:

I feel like there is a typo in this question.

But, it should be 70 degrees.

Step-by-step explanation:

Answer:

z = 1

Step-by-step explanation:

12 = 15(z - 1/5)

12/15 = z - 1/5

4/5 = z - 1/5

z = 1

Answer:

z = 1

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

12 = 15(z - 1/5)

12/15 = z - 1/5

4/5 = z - 1/5

z = 1

(P.S I did the khan academy)