please help i don’t understand

Answer:

0.96666666666667

Step-by-step explanation:

Answer:

3 hours

Step-by-step explanation:

divide the time value by 60

Answer:

Leslie worked for 3 hours

Step-by-step explanation:

There are 60 minutes in an hour, so simply divide 180 by 60, and you will get your answer, which is 3

Hope that helps

Answer:

x = 6

Step-by-step explanation:

using the cosine ratio in the right triangle and the exact value

cos60° = [tex]\frac{1}{2}[/tex] , then

cos60° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{x}{12}[/tex] = [tex]\frac{1}{2}[/tex] ( cross- multiply )

2x = 12 ( divide both sides by 2 )

x = 6

Answer:

first is -20 second is -30 and if you add those it is -50

Using the z-distribution, as we have the standard deviation for the population, it is found that the 99% confidence interval for the population mean is given by:

[tex]\overline{x} \pm 2.58\frac{s}{\sqrt{n}}[/tex]

The confidence interval is:

[tex]\overline{x} \pm z\frac{s}{\sqrt{n}}[/tex]

In which:

99% confidence level, hence[tex]\alpha = 0.99[/tex], z is the value of Z that has a p-value of [tex]\frac{1+0.99}{2} = 0.995[/tex], so [tex]z = 2.58[/tex].

The other parameters are symbolic, hence the interval is given by:

[tex]\overline{x} \pm 2.58\frac{s}{\sqrt{n}}[/tex]

More can be learned about the z-distribution at https://brainly.com/question/25890103

Answer:

what's the question pls?.......

The measure of one part of a rectangle divided into 4 parts is 1/4

If 1 whole is divided into 4 equal parts

= 1/4

So, if the perimeter of the rectangle is 60cm

1 part of 4 = 1/4 × 60cm

= 60/4

= 15 cm

Therefore, the measure of one part of a rectangle divided into 4 parts is 1/4

Learn more about rectangle:

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Answer: 1/2 and 2

Step-by-step explanation:

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

Answer: Volume = 349376 cm^3

Step-by-step explanation:

The volume of a rectangular prism is the length*width*height.

We can plug in the values given:

Volume = 412 cm * 4 cm * 212 cm

Volume = 349376 cm^3

Answer:

the awnser is 3 over 9

Step-by-step explanation: bc i like suck\

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Answer:

26°

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Answer:

lol

Step-by-step explanation:

aaaaaaaaa stop brainly

Answer:

the guy that invented umbrellas didnt know what to call it so he said "ummm... brella"

Step-by-step explanation:

Answer:

1. (c-d)(c+d)

2. (2c-3d(2c+3d)

3. (4ab-5cd)(4ab+5cd)

4. cannot be factorised into difference of two squares

Answer:

a=1

Step-by-step explanation:

2/3a + 5/6a - 1/6 = 0

-2/3a + 5/6a = 1/6

5/6a - 2/3a = 1/6

Lowest common multiple of 3 and 6 =6

(5/6-4/6)a =1/6

1/6a = 1/6

a=1/6 / 1/6

a=1

There are 4 positions in the string that each have 25 choices (any letter in the English alphabet except A) and the other positions are filled with A, so there are 25⁴ possible strings containing exactly 7 A's.

Overall, there are 26¹¹ possible strings of length 11.

Then the probability of randomly generating a string containing exactly 7 A's is

25⁴ / 26¹¹ ≈ 0.000000000106427

The augmented matrix is,

[tex]\left(\begin{array}{ccccc}1&-1&-4&|&5\\2&0&2&|&0\\4&1&1&|&3\end{array}\right)[/tex]

We have given system of linear equation is,

[tex]x - y - 4z = 5,2x + 2z = 0 ,4x +y +z = 3.[/tex]

In an augmented matrix, each row represents one equation in the system and each column represents coefficients (with signs) of variables or the constant terms.

So, the first row is

[tex]1\ -1\ -4\ 5[/tex]

the second row is

[tex]2\ 0\ 2\ 0[/tex]

and the third row is

[tex]4\ 1\ 1\ 3[/tex]

Therefore the augmented matrix for this linear system is,

[tex]\left(\begin{array}{ccccc}1&-1&-4&|&5\\2&0&2&|&0\\4&1&1&|&3\end{array}\right)[/tex]

To learn more about the augmented matrix visit:

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The augmented matrix for the given linear equations will be constructed as follows

[tex]\left[\begin{array}{ccc}1&-1&-4\\2&0&2\\4&1&1\end{array}\right] \left[\begin{array}{ccc}5&\\0\\3\end{array}\right][/tex]

The augmented matrix is generally a matrix form of the given linear equations and the coefficient of the variables are arranged in the form of a matrix.

The given equation has three variables so the matrix form will be of [tex]3\times3[/tex]

The given linear equations are

[tex]x-y-4z=5\\2x+0y+2z=0\\4x+y+z=3[/tex]

From the above equations, we will make an augmented matrix.

[tex]\left[\begin{array}{ccc}1&-1&-4\\2&0&2\\4&1&1\end{array}\right] \left[\begin{array}{ccc}5&\\0\\3\end{array}\right][/tex]

The first equation will be followed by the first row of the matrix and the rest will be followed the same.

Thus the augmented matrix for the given linear equations will be constructed as follows

[tex]\left[\begin{array}{ccc}1&-1&-4\\2&0&2\\4&1&1\end{array}\right] \left[\begin{array}{ccc}5&\\0\\3\end{array}\right][/tex]

To learn more about the Augmented matrix follow

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Answer: D: 321. 39 in³

Step-by-step explanation:

Bowling balls are spheres:

the volume of a sphere is calculated as:

V = 4/3 πr³

V = 4/3 π 4.25³

V = 4/3 x 241.044

V ≅321.39 in³

The answer is D

By finding the linear equation that relates distance and time, we can see that the complete table is:

time (hours)   distance (miles)

2                              100

1.5                             75

t                              (50)*t

1                                50

6                               300

d/(50)                          d

After a small online search, I've found that the table is:

time (hours)   distance (miles)

2

1.5

t  

                                50

                               300

                                  d

Now, remember the relation:

distance = speed*time.

In this case, we know that the speed is 50 mi/h, so if we define d as the distance and t as the time, we can write:

d = (50mi/h)*t

To complete the table, we just replace the value that appears in the table, and then we solve the equation for the other variable.

First we have t = 2 hours:

d = (50 mi/h)*2h = 100 mi

Then we have t = 1.5 hours

d = (50 mi/h)*1.5 h = 75 mi

Then we assume that we evaluate in t, so there we just write the equation:

d = (50 mi/h)*t

Now we go to the other side of the table, now we evaluate d, so we can write:

t = d/(50 mi/h)

(that is what goes in the table when we need to evaluate in d).

Then the fourth place in the table has d = 50 mi, replacing that:

t = (50mi)/(50 mi/h) = 1h

And finally, we evaluate in d = 300mi

t = (300 mi)/(50 mi/h) = 6h

Then the complete table is just:

time (hours)   distance (miles)

2                              100

1.5                             75

t                              (50)*t

1                                50

6                               300

d/(50)                          d

If you want to learn more about speed, you can read:

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Answer:

D. 60cm²

Step-by-step explanation:

First, notice how the partially shaded squares fit perfectly into one another (the squares are perfectly cut from corner to corner). Once you match these squares to one another, you can then figure out that they add up to three full squares.

Secondly, measure how many squares there will be in the diagram after adding up the partial squares (resulting in a total of 15).

Finally, calculate the area of one of the squares (2cm x 2cm), which results in 4cm². As you have 15 total squares, multiply 4cm² by that to get the final answer of 60cm².

Answer:

L= P/2 - 6

Step-by-step explanation:

As you know that the Perimeter of a Rectangle = 2(L+W)

since Perimeter = P  and Width = 6

Then P = 2(L+6)

Expanding

P=2L+12  -->  2L=P-12

Then L=(P-12)/2=P/2-6

The perimeter is twice the sum of width and length. Then the length of the rectangle is P/2 – 6 units.

It is a polygon that has four sides. The sum of the internal angle is 360 degrees. In a rectangle, opposite sides are parallel and equal and each angle is 90 degrees. And its diagonals are also equal and intersect at the mid-point.

If the width of a rectangle with perimeter P is 6 units.

Perimeter = P

Width = 6 units

Then the length of the rectangle will be

Perimeter = 2 (Width + Length)

             P = 2 (6 + L)

             L = P/2 – 6

The length of the rectangle is P/2 – 6 units.

More about the rectangle link is given below.

https://brainly.com/question/10046743

Step-by-step explanation:

please I don't understand the question

Angle is formed by the two rays. The angle with measurement –102° will lie in the third quadrant.

An angle is formed by the two rays, the two rays are known as the two sides of the angle.

As it is given that the measure of the angle is –102°, therefore, the angle will be measured from the positive x-axis in the clockwise direction, therefore, the angle will lie in the third quadrant as shown in the image below.

Learn more about Angle:

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Answer:

= 1 4/15 or 19/15

Step-by-step explanation:

2/3 + 3/5 = 10/15 + 9/15
improper = 19/15
proper = 1 4/15

Answer:

(3x^2 + 5x +3) (x + 5)

Answer:

65789.000

Step-by-step explanation:

May God bless you and your family during spring break

Answer:

b

Step-by-step explanation:

if the line is solid the it is <> or equal to which it is in this case

the line also goes through the x axis so it is to do with x

and the shaded region is covering values of -7 and less so it is

[tex]x \leq -7[/tex]

Answer:

The angles 53 and 127 are supplementary.

The angles 56 and 34 are complementary.

The angles 67 and 67 are neither.

Step-by-step explanation:

Supplementary angles are two angles that add up to 180 degrees.

Complementary angles are two angles that add up to 90 degrees.

Add the angles found in each choice to get 180, 90, and 134.

put x=4

[tex]\\ \rm\longmapsto y=40(0.6)^4[/tex]

[tex]\\ \rm\longmapsto y=40(2.4)

[tex]\\ \rm\longmapsto y=40(0.13)

[tex]\\ \rm\longmapsto y=5.2ft[/tex]