CAN SOMEONE HELP:) PLSSS

Answer:

11

Step-by-step explanation:

When you plug in -2 for x you get -4(-2) +3

8 +3 = 11

F(-2)=11

Hope this helps, have a nice day

Answer:

f(- 2) = 11

Step-by-step explanation:

To evaluate f(- 2) , substitute x = - 2 into f(x), that is

f(- 2) = - 4(- 2) + 3 = 8 + 3 = 11

The house was in the shape of an octagon, with eight separate bedrooms on each side.

The house described in the statement has an octagonal shape. An octagon is a polygon with eight sides, characterized by its eight equal angles. In this case, each side of the house corresponds to one of these angles, resulting in eight separate bedrooms on each side of the octagonal structure.

The choice of an octagon as the shape of the house can have various implications. Octagonal buildings are often admired for their unique architectural design and aesthetic appeal. The shape provides symmetry and balance, allowing for an interesting and visually pleasing structure. Additionally, an octagonal layout can offer practical advantages in terms of space utilization and room distribution. In the case of the house described, each side of the octagon accommodates a separate bedroom, providing privacy and ample living space for its occupants. The symmetrical arrangement of the bedrooms around the central area of the house could create a harmonious and well-organized living environment. Overall, the octagonal shape of the house with eight separate bedrooms on each side offers both architectural and functional benefits.

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The problem does not mention the height of S. Mr. Watkins, so we are just going to assume its from his feet.  

So, i made this drawing to represent him and the tree, at a distance of 10 meters looking up at a 25* angle.

I marked the opposite side, adjacent side, and hypotenuse.

x is angle where you are "looking" from.  I.E., from the POV of mr watkins.

sin(x) = opposite/hyp

cos(x) = adj/hyp

tan(x) = opp/adj

So, we have an unknown side which is the opposite side, represented by length x.

The side adjacent is 10 meters.

The angle from him is 25 degrees.

What deals with adjacent and opposite?  Tangent.

Tan(25) = x/10

Solve for x.

10tan(25) is the height of the tree = 4.66

The height of the tree is 5 meters.

The width is 53 yards and the length is 108 yards.

To find the dimensions:

Now, solve as follows:

The width measures 53 yards.

To calculate the length, multiply 53 by two and add two.

Therefore, the width is 53 yards and the length is 108 yards.

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The correct question is given below:
The length of a new rectangular playing field is 2 yards longer then double the width. If the perimeter of the rectangular playing field is 322 yards, what are its dimensions?

Answer:

1 banana = 0.25

Step-by-step explanation:

Find the proportion. Simply divide the cost from the amount of bananas given:

0.50/2  = 0.25

1.00/4 = 0.25

1.50/6 = 0.25

$0.25 is the cost per banana, and is your proportion.

~

Answer:

1 banana = + $0.25

2 bananas = + $0.50

Step-by-step explanation:

If it is increasing %0.50 for every 2 bananas then that also means it's increasing $0.25 for every 1 banana.

Answer:

m A = 63

m C = 27

Step-by-step explanation:

to find the angle of a use trigonometry by doing, cos-1(17/38) = 63

to find C, we know angles in a triangle add to 180. We know the right angle is 90 degrees so do 90 + 63 = 153

180 - 153 = 27

so C = 27 degrees

Answer:

the answer is the one in the bottom right corner

The projected test grade for a student with a homework grade of 35 is 47.74.

The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.

Homework Grade (x)                Test Grade (y)

78                                                    90

87                                                    88

85                                                    88

78                                                     83

74                                                     81

76                                                     81

41                                                      52

55                                                     62

Let us find the slope m=62-52/55-41

=10/14=0.714

62=0.714(55)+b

b=22.75

Now let us find the projected test grade, to the nearest integer, for a student with a homework grade of 35 is 47.74

So y=0.714(35)+22.75

y=47.74

Hence, the projected test grade for a student with a homework grade of 35 is 47.74.

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Answer:

Thus, the values of x are 70° and 250°

Step-by-step explanation:

Trigonometric Functions

The tangent is defined as:

\(\displaystyle \tan\theta=\frac{\sin\theta}{\cos\theta}\)

Given a value for the tangent, there are two angles with the same tangent, one of them being \(\theta\) and the other \(\theta\)+180°.

We are given:

\(\tan x=2.7475\)

The angle is the inverse tangent:

\(x=arctan (2.7475)\)

Using a scientific calculator, we find the first angle:

x=70°

The second angle is found adding 180°:

x=70°+180°=250°

Thus, the values of x are 70° and 250°

A triangle and a quadrilateral are special cases of a polygon.

A polygon is a two-dimensional geometric shape that is formed by connecting a finite number of line segments called sides. It is a closed figure with straight sides.

A triangle is a polygon with three sides, while a quadrilateral is a polygon with four sides.

In general, a polygon can have any number of sides greater than or equal to three. Triangles and quadrilaterals are specific examples of polygons with a fixed number of sides.

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The two lines AB and XY are neither parallel nor perpendicular.

According to the question we have been given the respective coordinates which are :

 A = (-3,5)   , B = (-1,3)

X = (-4,-8)   , Y = (4,-6)

We need to find if AB and XY are parallel , perpendicular or neither.

So to find if they are parallel or perpendicular we will first find out the slope of the line. As when the slope are equal then they are parallel and if they are negative reciprocals of each other then they are perpendicular to each other .

Thus, Slope of AB =  \(m_{1}\) =  \(\frac{(y_{2}-y_{1} ) }{(x_{2}-x_{1} ) }\)

                                 \(m_{1}\) = (3-5)/(-1+3)

                                 \(m_{1}\) = -2/2

                                  \(m_{1}\) = -1

          Slope of XY = \(m_{2}\) = (-6+8)/(4+4)

                                       = 2/8

                                        = 1/4

As the slope of both lines are not related to each other. Hence, the lines AB and XY  are neither parallel nor perpendicular.

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Answer:

the first option

Step-by-step explanation:

(f-g)(x) simply means to subtract both expressions. really literally.

and we go through it power by power of x.

the highest power/exponent of x is 3 (x³). only f(x) has one.

so, -7x³ is the first part of f-g.

next is x².

11x² - 6x² = 5x², which is the second part of f-g.

next is x.

-8x - (-14x) = -8x + 14x = 6x, which is the third part of f-g.

next is x⁰ (in other words, no x, just a constant).

4 - (-3) = 4 + 3 = 7, which is the 4th part of f-g.

we have no x to the power of -1 or -2, so we have -3

0 - (-4x‐³) = 4x‐³, which is the last part of f-g.

so, it is clearly the first answer option.

Answer:

B

Step-by-step explanation:

Look how point D moved to point D". It went 7 units left and 1 unit down. All points in ABCD moved the same way to A"B"C"D. It's a translation of 7 units left and 1 unit down.

Answer: B

Answer:

C. 164

Step-by-step explanation:

its self explanitory

The example that meets the given specific conditions that 3 × 3 nonzero matrices and ab = 033 are a = \(\left[\begin{array}{ccc}0&0&0\\0&0&0\\1&0&0\end{array}\right]\) and b = \(\left[\begin{array}{ccc}0&1&1\\0&0&0\\0&0&0\end{array}\right]\).

To get such examples where matrix's configuration is 3 x 3 and the multiplication of the matrix is equal to zero, we need to take such values on a specific position so that the multiplication results in zero. We have been given certain conditions, which needs to be taken care of.

According to the question given, a and b are 3 × 3 nonzero matrices:

a = \(\left[\begin{array}{ccc}0&0&0\\0&0&0\\1&0&0\end{array}\right]\)

b = \(\left[\begin{array}{ccc}0&1&1\\0&0&0\\0&0&0\end{array}\right]\)

Now, multiplication of a and b results:

ab = \(\left[\begin{array}{ccc}0&0&0\\0&0&0\\1&0&0\end{array}\right] * \left[\begin{array}{ccc}0&1&1\\0&0&0\\0&0&0\end{array}\right]\)

ab = \(\left[\begin{array}{ccc}0*0 + 0*0 + 0*0& 0*1 + 0*0 + 0*0&0*1 + 0*0 + 0*0\\0*0 + 0*0 + 0*0&0*1 + 0*0 + 0*0&0*1 + 0*0 + 0*0\\0*0 + 0*0 + 1*0&0*1 + 0*0 + 0*0&0*1 + 0*0 + 1*0\end{array}\right]\)

ab = \(\left[\begin{array}{ccc}0&0&0\\0&0&0\\0&0&0\end{array}\right]\)

Therefore, the example that meets all the given specific conditions in the question are a = \(\left[\begin{array}{ccc}0&0&0\\0&0&0\\1&0&0\end{array}\right]\) and b = \(\left[\begin{array}{ccc}0&1&1\\0&0&0\\0&0&0\end{array}\right]\).

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Answer:

(27x2)1/3 1/3±27×2

Step-by-step explanation:

es la cantidad que me dio al resolverlo

Answer:

its 3x square root i think

Step-by-step explanation:EZ

Her pupils were 2 * mm after being dilated.

Step 1: Identify the original size of Tori's pupils, which is "mm".
Step 2: Since her pupils were dilated to twice their normal size, multiply the original size by 2.

Calculation: mm * 2

If Tori's pupils were originally x mm in size, and they were dilated to twice their normal size, we can set up the following equation:

2x = size after dilation

To find the size of her pupils after dilation, we need to solve for "size after dilation" in the equation above.

Dividing both sides of the equation by 2, we get:

x = (size after dilation) / 2

Therefore, the size of Tori's pupils after being dilated is x/2 mm.

So, the size of Tori's pupils after being dilated would be 2 * mm, or simply 2mm.

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Answer:

3rd option

Step-by-step explanation:

the factors of 48 are

1 , 2, 3, 4, 6, 8, 12, 16 , 24 , 48

the factor pairs are

1 × 48 , 2 × 24 , 3 × 16 , 4 × 12 , 6 × 8

Certainly, there is a significant difference in the mean amount of e.coli bacteria detected by the two methods for this type of beef. This can be supported statistically by conducting a hypothesis test.

           The null hypothesis (\(H_0\)) is that there is no significant difference in the mean amount of E. coli bacteria detected by the two methods. The alternative hypothesis (\(H_a\)) is that there is a significant difference in the mean amount of e.coli bacteria detected by the two methods.

          The two-sample t-test can be used to test the hypothesis. The t-test compares the means of two independent groups and determines whether they are significantly different. The t-test assumes that the two samples are normally distributed and have equal variances.

          If the sample sizes are large, then the t-test can still be used even if the samples are not normally distributed.

          The formula for the t-test is:

                   \(t = (x_1 - x_2) / [s^2(1/n_1 + 1/n_2)]\)

       Where:

                     \(x_1\) = the sample mean for method 1

                     \(x_2\) = the sample mean for method 2

                     \(s^2\) = the pooled variance of the two samples

                     \(n_1\) = the sample size for method 1

                     \(n_2\) = the sample size for method 2

        The t-value can then be compared to the critical value of  \(t\) for the desired level of significance (usually 0.05).

         If the t-value is greater than the critical value of \(t\), then the null hypothesis can be rejected and it can be concluded that there is a significant difference in the mean amount of E. coli bacteria detected by the two methods.

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Answer:

A.  y = x + 25

    x + y = 75

B.  25 minutes

C.  50 minutes

Step-by-step explanation:

Define the variables:

If Jackie dances 25 minutes more than she runs:

\(\implies y=x+25\)

If Jackie runs and dances for 75 minutes:

\(\implies x+y=75\)

Substitute the first equation into the second equation and solve for x:

\(\implies x+(x+25)=75\)

\(\implies 2x+25=75\)

\(\implies 2x+25-25=75-25\)

\(\implies 2x=50\)

\(\implies 2x\div 2=50 \div 2\)

\(\implies x=25\)

Therefore, Jackie spends 25 minutes running everyday.

Substitute the found value of x into the first equation and solve for y:

\(\implies y=25+25\)

\(\implies y=50\)

Therefore, the greatest amount of time Jackie could spend dancing every day, given she will take a run, is 50 minutes.

Therefore, the equation that models the temperature of the casserole is T = (70 - Ta)e(kt) + Ta.

To set up the differential equation that models the temperature of the casserole, let's define a few variables:

Let T(t) represent the temperature of the casserole at time t (in minutes).

Let Ta be the ambient temperature (constant) of 400°F.

According to Newton's law of heating, the rate of change in temperature is proportional to the difference between the temperature of the casserole and the ambient temperature. Mathematically, we can express this as:

dT/dt = k(T - Ta),

where k is the proportionality constant.

Now, let's state the initial condition:

At t = 0, T(0) = 70°F.

To solve this differential equation, we can use separation of variables. Rearranging the equation, we have:

dT/(T - Ta) = k dt.

Now, integrate both sides:

∫ dT/(T - Ta) = ∫ k dt.

The left side can be integrated using natural logarithm, and the right side is a simple integration:

ln|T - Ta| = kt + C,

where C is the constant of integration.

To solve for T, we can exponentiate both sides:

|T - Ta| = e(kt + C).

Since the temperature cannot be negative, we can drop the absolute value sign:

T - Ta = e(kt + C).

Next, we can simplify the right side using properties of exponential functions:

T - Ta = Ae(kt),

where A = eC.

Finally, we can solve for T:

T = Ae(kt) + Ta.

To determine the value of the constant A, we can use the initial condition T(0) = 70°F:

70 = Ae(k * 0) + Ta,

70 = A + Ta,

A = 70 - Ta.

Therefore, the equation that models the temperature of the casserole is:

T = (70 - Ta)e(kt) + Ta.

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The situation which is most likely to have a constant rate of change is the distance of a run compared with the number of times around a track.

The rate of change is defined as the change in the magnitude of one value with respect to other value.

Given are some scenerios depicting rate of change.

The situation which is most likely to have a constant rate of change is the distance of a run compared with the number of times around a track as the length of the circular track is constant and the number of times a circular track is run also exists in whole number.

Therefore, the situation which is most likely to have a constant rate of change is the distance of a run compared with the number of times around a track.

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First, we need to find the individual vectors for u and w. Since we don't have that information, we can't calculate the cross product directly.

However, we can use the fact that u X w = <3,-1,7> to find the cross product of u and w.

From the given equation, we can distribute the scalar values:

(4u X w) - (3w X w)

We know that the cross product of any vector with itself is 0, so the second term becomes 0:

(4u X w) - 0

Now we can substitute the value for u X w:

(4<3,-1,7>)

= <12,-4,28>

Therefore, (4u-3w) X w = <12,-4,28>.

To calculate the cross product of (4u - 3w) X w, we can use the following property of cross products:

A X (kB) = k(A X B), where A and B are vectors, and k is a scalar.

We know that u X w = <3, -1, 7>. Now, we need to calculate (4u - 3w) X w:

(4u - 3w) X w = 4(u X w) - 3(w X w)

Since the cross product of a vector with itself is zero, w X w = 0. Therefore, the equation simplifies to:

(4u - 3w) X w = 4(u X w)

Now, we can use the given u X w = <3, -1, 7>:

(4u - 3w) X w = 4(<3, -1, 7>) = <12, -4, 28>

So, the cross product of (4u - 3w) X w is <12, -4, 28>.

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The length of the longest possible ladder that can negotiate the turn in the hallway is approximately 16.86 feet.

To find the length of the longest ladder, we can use the Pythagorean theorem, which states that in a right-angled triangle, the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. In this case, the hallway forms a right-angled triangle, with one side measuring 14 feet and the other side measuring 8 feet.

Using the Pythagorean theorem, we can calculate the length of the hypotenuse (the ladder) as follows:

\(c^2 = a^2 + b^2\)

where c is the hypotenuse (length of the ladder), and a and b are the lengths of the other two sides.

Plugging in the values:

\(c^2 = 14^2 + 8^2\)

\(c^2 = 196 + 64\)

\(c^2 = 260\)

c ≈ √260

c ≈ 16.86 feet

Therefore, the length of the longest possible ladder that can negotiate the turn in the hallway is approximately 16.86 feet.

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The tree diagram illustrates the probabilities associated with different combinations of weather patterns and seasons of the year. The tree diagram is a visual representation that presents the probabilities of various outcomes resulting from the combination of weather patterns and seasons of the year.

It is a useful tool for understanding the likelihood of specific events occurring based on different factors.

The diagram is structured hierarchically, with the weather patterns forming the first level and the seasons of the year forming the second level. Each branch represents a specific combination, and the probability associated with that combination is indicated on the branch.

By analyzing the diagram, one can observe how the probabilities change depending on the weather patterns and seasons. For instance, certain weather patterns may be more prevalent during specific seasons, resulting in higher probabilities for certain combinations.

Overall, the tree diagram serves as a visual aid to comprehend the probabilities associated with simple events combining weather patterns and seasons of the year, enabling a better understanding of the likelihood of different outcomes based on these factors.

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Answer:

If x is the required number, equation will be 9+4x=8

Answer: 20

Step-by-step explanation:

32 divided by 8 = 4

4 x 3 = 12

32 - 12 = 20

This was how I learned to multiply fractions with my teacher so sorry if you don't understand :/

I Hope This Helps!

The total number of cookies that were not burnt are; 20

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.

We have been given that Susan made 32 cookies. If 3/8 of the cookies

burnt in the oven, then we need to find the cookies that were not burnt.

Therefore we have to multiply the 32 cookies by  3/8 of the cookies

burnt in the oven.

Thus,

32 x 3/8 =4 x 3

= 12

Now the cookies that were not burnt are;

32 - 12 = 20

Hence, the total number of cookies that were not burnt are; 20

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