Find the mean for the number of hours of sleep: 6 7 5 8 6 7 6 8
66
6.7
7
6.625
66.25

Answer: 30 cars left

Step-by-step explanation:

if from 33 cars we subtract 3, we get 30 cars left.

33 - 3 = 30 ...answer

hope that helps...

Answer:

60.48

Step-by-step explanation:

Answer:51.52

Step-by-step explanation:

On solving the provided question, we can say that Therefore, the function has an average rate of change of -1.

The subject of mathematics includes quantities and their variations, equations and related structures, shapes and their locations, and places where they can be found. The term "function" refers to the relationship between a set of inputs, each of which has an associated output. A connection between inputs and outputs in which each input leads to a single, distinct result is known as a function. Each function is given a domain and a codomain, or scope. Usually, f is used to denote functions (x). input is an x. There are four main types of functions accessible. based on the following factors: on functions, one-to-one functions, many-to-one functions, inside functions, and on functions.

The function has an average rate of change of -1.

R = 4-5/1-0

R = -1

Therefore, the function has an average rate of change of -1.

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Answer:  x = 7

Step-by-step explanation:

    [tex]\frac{2x}{7} =\frac{6}{3}[/tex]

we cross multiply, we get

2x(3) = 6(7)

   6x = 42

     x = 7

The value of {x} is equivalent to +55.

In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.

Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.

Given is that -

" - {-(x)} is 55 units to the right of 0".

It is given that -

- {-(x)} = {x}                                 ..... ( 1 )

We can rewrite -

{x} is 55 units to the right of 0.

As an equation, we can write -

0 + 55 = {x}

{x} = + 55

Therefore, the value of {x} is equivalent to +55.

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The scatterplot of the residuals should display random scatter if a linear model is suitable, and the histogram should appear about normal.

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As per the natural tendency of cooling with temperature the rate of decrese in temperature is also decresing so the cooling of a soup cannot be described by a linear model.

A relationship that has one output for each input value (x-value) is called a function (y-value). All functions are hence relations. However, not all relationships are functions since not every relationship will satisfy the condition that every distinct input generates just one output.

Check to see if there is a horizontal asymptote or an oblique asymptote by comparing the degrees of the numerator and denominator to the function's end behavior. Plot the asymptotes that are horizontal or oblique.

As per the natural tendency of cooling with temperature the rate of decrese in temperature is also decresing so the cooling of a soup cannot be described by a linear model.

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The statement "the sum of measures of angles B and A is 130 degrees" is  correct. Therefore, option A, B and E are the correct answer.

An isosceles trapezoid can be defined as a trapezoid in which non-parallel sides and base angles are of the same measure. In other words, if two opposite sides (bases) of the trapezoid are parallel, and the two non-parallel sides are of equal lengths, then it is an isosceles trapezoid.

Given that, an isosceles trapezoid ABCD has two parallel sides AB and CD and m∠A = 65°.

Correct statements are

The sum of measures of angles B and A is 130 degrees.

The measure of angle D is 115 degrees.

The sum of measures of angles B and C is 180 degrees.

Therefore, option A, B and E are the correct answer.

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The point (-2 3/4, -4 1/2) is plotted below.

Coordinates are the set of points in a geometrical plane or space, which is used to denote the exact point in the coordinate plane or space.

The given point is (-2 3/4, -4 1/2).

Both the coordinates are in the mixed number form.

-2 3/4 = -(2 × 4 + 3) / 4 = -11/4 = -2.75

-4 1/2 = -(4 × 2 + 1) / 2 = -9/2 = -4.5

So the point is (-2.75, -4.5).

Hence the given point is (-2.75, -4.5) which is marked in the coordinate plane as shown below.

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On solving the provided question, we can say that Area of pizza is [tex]\pi*r^2[/tex]=25 pi in^2 Divide that by 8 3.125 [tex]\pi in^2[/tex] => 9.82 cm^2 => [tex]9.8 cm^2[/tex] is the  answer

The size of an area on a surface can be expressed as an area. The area of an open surface or the boundary of a three-dimensional object is referred to as the surface area, whereas the area of a planar region or planar region refers to the area of a form or planar layer. The total amount of space filled by a planar (2-D) surface or shape of an object is known as its area. Draw a square on a piece of paper using a pencil. a character with two dimensions. The area of a shape on paper is the space it takes up. Imagine that the square is composed of more compact unit squares.

Area of pizza is [tex]\pi*r^2[/tex]=25 pi in^2

Divide that by 8

3.125 [tex]\pi in^2[/tex] => 9.82 cm^2

[tex]9.8 cm^2[/tex] is the  answer

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The required volume of the given right rectangular prism is 2x³ - 4x² cubic units.

Volume is defined as the mass of the object per unit density while for geometry it is calculated as profile area multiplied by the length at which that profile is extruded.

here,
From the figure,
Volume = length × width × height
            = [2x - 4] × x × x
            = [2x³ - 4x²]

Thus, the required volume of the given right rectangular prism is 2x³ - 4x² cubic units.

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Answer:75%

Step-by-step explanation:3/4 is equal to 0.75

Answer: 7.34375

Step-by-step explanation:

Answer step bby step:

1. Isolate the variable:

1/5(4x - 2.5) = 5(0.4x + 10) + 3 1/2

5(0.4x + 10) + 3 1/2 = 1/5(4x - 2.5)

2. Multiply both sides by 5:

2(0.4x + 10) + 3 1/2 = 4x - 2.5

3. Subtract 2(0.4x + 10) from both sides:

3 1/2 = 4x - 2(0.4x + 10)

4. Subtract 3 1/2 from both sides:

0 = 4x - 2(0.4x + 10) - 3 1/2

5. Distribute the -2 to the parentheses:

0 = 4x - 0.8x - 20 - 3 1/2

6. Combine like terms:

0 = 3.2x - 23.5

7. Divide both sides by 3.2:

x = 7.34375

The required area of the shaded region is 11.5 sq. units

Area is defined as the total space taken up by a flat (2-D) surface or shape of an object.

Given is a circle with center T and radius 3 units. there is a region in the circle which is shaded, we need to find that area.

So, the shaded part is composed of a right triangle and a minor sector of the circle.

To find the area of the shaded portion, we will add the area of right triangle and a minor sector

Now, area of a triangle = 1/2 × base × height

Here, base = height = radius = 3 units

And,

Area of a sector = θ/360° × π × radius²

Where, θ is the central angle.

θ = 90°

Area of the shaded region = 1/2 × 3 × 3 + 90°/360° × 3.14 × 3²

= 9/2 + 7.065

= 11.565

Hence, the required area of the shaded region is 11.5 sq. units

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The answer is 506 not to sure since I haven't done this in a while

Answer:

506

Step-by-step explanation:

According to the order of operations(or PEMDAS), you would first evaluate the exponent in the problem: [tex]8^3[/tex]. [tex]8^3[/tex] is equivalent to [tex]8*8*8[/tex], which is just 512. Therefore, the equation would now be 512 - 9 * 2 ÷ 3

Next step would be to do out the multiplication and division left to right. First is 9 * 2 which is 18. Then that is divided by three to get 6. The equation would now be 512 - 6.

512 - 6 is just 506.

An equation of the line that passes through the point (1, -3) and has a slope of -3 in slope-intercept form is y = 2x + 3.

Mathematically, the standard form of the equation of a straight line is given by this mathematical expression;

y = mx + c

Where:

Next, we would determine the slope of this straight line by using this mathematical equation;

Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

Slope (m) = (15 - 3)/(2 - (-4))

Slope (m) = 12/6

Slope (m) = 2.

Therefore, the equation in slope-intercept form is given by:

y = mx + c

y = 2x + 3

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Answer:

The shelf should be 0 degrees relative to the floor.

Step-by-step explanation:

When an object is parallel to the floor, it means that it is aligned with the floor at the same angle and does not slope up or down.

In other words, the angle between the shelf and the floor is 0 degrees.

So, to attach the shelf so that it is parallel to the floor, Dana should ensure that the angle between the shelf and the floor is 0 degrees.

Answer:

9:8

Step-by-step explanation:

We know that 72:64

If you multiply 9 by 8 you get 72, so you know that the answer will have to be simplified by 8.

64/8 = 8

Therefore your answer for this will be 9:8

The number of cubic units needed to add to the figure so that it will have a total volume of 12 cubic units,  4 units

In mathematics, Space occupied by three dimensional objects is called Volume. Basically it is a space within a closed region of every three dimensional object.

Given that,

There are 2 units  in each back side and front side,

So, there are 4 units on the back and front,

Now the number of units between them,

There are 4 units in between both the sides,

Add all the units,

4 + 4 = 8,

there are total 8 units in this figure

Now, the number of units should be added to these 8 units to get a result of 12 units altogether.

So, subtract the 8 units from the 12 units

12 - 8 = 4,

Hence, The units required are 4

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Answer:

x<-5

Step-by-step explanation:

-(2+2x)-2>6

-(2+2x)>8

2+2x<-8

2x<-10

x<-5

Answer:

7. √149 ft or 12.2 ft

8. 5√2 m or 7.07 m

9. √36.75 in. or 6.06 in.

Step-by-step explanation:

7.

a² + b² = c²

7² + 10² = x²

49 + 100 = x²

x² = 149

x = √149

x ≈ 12.2

Answer: √149 ft or 12.2 ft

8.

perimeter = 20 m

side = perimeter/4 = 5 m

a² + b² = c²

5² + 5² = x²

25 + 25 = x²

x² = 50

x = 5√2

Answer: 5√2 m or 7.07 m

9.

a² + b² = c²

3.5² + x² = 7²

12.25 + x² = 49

x² = 49 - 12.25

x² = 36.75

x = √36.75 = 6.06

Answer: √36.75 in. or 6.06 in.

Answer:

  7.  12.2 ft

  8.  7.07 m

  9.  6.06 in

Step-by-step explanation:

You want the hypotenuse of at right triangle with legs 7 and 10 ft, the diagonal of a square with perimeter 20 m, and the altitude of an equilateral triangle with side length 7 inches.

These problems all make use of the Pythagorean theorem, which tells yo the relation between sides a, b and hypotenuse c of a right triangle is ...

  a² +b² = c²

The length of the leash (c) is ...

  c² = (7 ft)² +(10 ft)² = 149 ft²

  c = √149 ft ≈ 12.2 ft

The leash is about 12.2 feet long.

Each side of the square is 1/4 of the perimeter, so is 5 m. The diagonal is the hypotenuse of a right triangle with legs that length. Its measure is ...

  c = √(5² +5²) = 5√2 ≈ 7.07 . . . . meters

The length of the diagonal is about 7.07 meters.

The altitude of an equilateral triangle is a perpendicular bisector of one side. Its length is ...

  b = √(c² -a²)

  b = √(7² -3.5²) = √36.75 ≈ 6.06 . . . . inches

The altitude of the triangle is about 6.06 inches.

__

Additional comment

The triangles of problems 8 and 9 are known as the two "special" right triangles.

The side lengths of an isosceles right triangle (angles 45°-45°-90°) have the ratios 1 : 1 : √2.

The side lengths of a triangle with angles 30°-60°-90° have the ratios 1 : √3 : 2.

That is, the diagonal of the square is √2 times its side length, and the altitude of the equilateral triangle is (√3)/2 times is side length.

It can be useful to remember these triangles and their side ratios.

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The total surface area painted black is 50.2 square feet.

Let's call the radius of the base of the cone r. We can find it using the formula for the circumference of a circle:

C = 2πr

8π = 2πr

r = 4

Next, let's find the slant height of the cone, which is the distance from the tip of the cone to the base along a straight line that passes through the center of the base. We can use the Pythagorean theorem:

s^2 = r^2 + h^2

s^2 = 4^2 + 12^2

s^2 = 16 + 144

s^2 = 160

s = sqrt(160) = 12.8

Next, let's find the surface area of one cone. The surface area of a cone is equal to π times the radius of the base times the slant height, plus π times the radius of the base squared:

A = πr * s + πr^2

A = π * 4 * 12.8 + π * 4^2

A = 50.24 + 16π

A = 50.24 + 50.24

A = 100.48

Since the base and 50% of the lateral surface of each cone is painted red, that means 50% of the surface area is painted black:

black_area = 0.5 * 100.48

black_area = 50.24

Rounding to the nearest tenth, the total surface area painted black is 50.2 square feet.

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105 watts

The middle wattage is found by taking the average of the highest and lowest wattages. To find the average, you add the two numbers together and then divide by 2. In this case, the lowest wattage is 60 and the highest is 150, so when we add these two numbers together, we get 210. Then, when we divide 210 by 2, we get 105. So the middle wattage is 105 watts.

it is not accurate to state that one of the cross sections is a square as it will be a rectangle.

What is a square?

Having four equal sides, a square is a quadrilateral. There are numerous square-shaped objects in our immediate environment. Each square form may be recognised by its equal sides and 90° inner angles. A square is a closed form with four equal sides and interior angles that are both 90 degrees. Numerous different qualities can be found in a square.

The given figure is a rectangular cuboid

Another name for a three-dimensional orthotope is a right rectangular prism, often known as a rectangular cuboid or rectangular parallelepiped.

Here the side of the cuboid is a rectangle, so the cross-section of that will be a rectangle, not a square.

Hence it is not accurate to state that one of the cross sections is a square.

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Answer:

  incorrect premise

Step-by-step explanation:

You want to know why it is inaccurate to say one of the cross sections of a rectangular prism is a square.

Cross sections parallel to any face will have the same shape as the face. Those may or may not be square, depending on the shape of the face.

However, if a cross section may be made at any angle, there is always a cross section of a rectangular prism that can be a square. The attached figure shows an example.

The corresponding value of h is less than or equal to 5.

A quadratic function is a polynomial function of the form:

f(x) = ax^2 + bx + c,

where a, b, and c are constants and x is the independent variable. The graph of a quadratic function is a parabola, which is a symmetrical, U-shaped curve.

The set of all feasible dependent variable values based on the input or independent variable constitutes the range of a quadratic function. The direction of the parabola and the value of the y-intercept can be used to establish the range (the constant c).

In mathematics, science, and engineering, quadratic functions are used extensively. Examples include modeling motion, projectile motion, and parabolic reflectors as examples of physical phenomena. They are also utilized in optimization issues where the aim is to discover the highest or lowest value of a given function.

According to question:

The range of a quadratic function is the set of all possible values of the dependent variable, based on the input or independent variable.

From the table, it appears that the range of the function h is all real numbers less than or equal to 5. This is because, for all values of x given in the table, the corresponding value of h is less than or equal to 5. So, the correct answer is:

Of-27, -13, -3, 3, 5}

All real numbers less than or equal to 5

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The given trigonometric equation is csc²x-1 =cotx/tanx is proved LHS=RHS.

A trigonometric equation is one that involves one or more of the sixs sine, cosine, tangent, cotangent, secant, and cosecant. Some trigonometric equations, like x = cos x, can be solved only numerically, through successive approximations.

The given trigonometric equation is csc²x-1 =cotx/tanx.

Here, csc²x-1 =cosx/sinx ÷ sinx/cosx

csc²x-1 =cosx/sinx × cosx/sinx

csc²x-1 =cos²x/sin²x

csc²x-1 =cot²x

We know that, cot²x+1=csc²x

So, cot²x=cot²x

Hence, proved LHS=RHS.

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The boat speed in still water is 2 km/hr.

Speed is a measure of how fast an object is moving. It is defined as the distance traveled by an object in a given amount of time. Speed is a scalar quantity, meaning it only has magnitude and does not have direction. It is typically expressed in units of distance per time, such as meters per second (m/s) or miles per hour (mph). The formula for speed is speed = distance / time. It is important to distinguish speed from velocity, which is a vector quantity that includes both magnitude (speed) and direction.

The formula to calculate the speed of the boat in still water is:

speed = distance / (time up + time down)

To use this formula, we first need to find the distance traveled upstream and downstream. Let's assume that the distance traveled upstream and downstream is the same, so we can use the average of the two times: (30 min + 10 min) / 2 = 20 min.

Next, we need to convert the time to hours. 20 minutes is equal to 20/60 = 1/3 hours.

Now, let's calculate the distance using the current speed of 2 km/hr:

distance = current speed * time

distance = 2 km/hr * 1/3 hours = 2/3 km

Finally, we can use the formula to calculate the boat speed:

speed = distance / time = 2/3 km / (1/3 hours) = 2 km/hr

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Answer: The mass of one mole of a substance is equal to its molar mass in grams. The molar mass of a substance is the mass of one mole of that substance and is usually expressed in atomic mass units (amu) or grams per mole (g/mol).

One mole of a substance contains Avogadro's number of particles, which is approximately 6.022 x 10^23.

Since the mass of one doughnut is given in grams (74 g), we can assume that this is the molar mass of the substance in question. So, the mass in grams of one mole of the substance is:

Mass of one mole = 74 g

So, the answer to two significant figures is:

Mass of one mole = 74 g (rounded to two significant figures).

Step-by-step explanation:

[tex]\displaystyle \lim_{x\to -4}~\cfrac{~~ \frac{1 }{4 }+\frac{1}{x} ~~}{4+x} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{~~ \frac{1 }{4 }+\frac{1}{x} ~~}{4+x}\implies \cfrac{~~ \frac{4+x}{4x} ~~}{4+x}\implies \cfrac{~~ \frac{4+x}{4x} ~~}{\frac{4+x}{1}}\implies \cfrac{4+x}{4x}\cdot \cfrac{1}{4+x}\implies \cfrac{1}{4x} \\\\[-0.35em] ~\dotfill\\\\ \displaystyle \lim_{x\to -4}~\cfrac{1}{4x}\implies \cfrac{1}{4(-4)}\implies -\cfrac{1}{16}[/tex]

The correct value of the measure of the exterior angle is 72 degrees

You should understand that when one side of a polygon is produced, the angle so formed is called an exterior angle

Note also that two opposite interior angles equal to one exterior angle

This implies that

x+30=2x-12

Collecting like terms

x-2x=-12-30

-x=-42

the value of x is 42

Then substitute x for the exterior angle

2(42)-12

84-12 = 72

The exterior angle is 72 degrees

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