A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows:

First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0

Second period: 3, 2, 3, 1, 3, 4, 2, 4, 3, 1, 0, 2, 3, 1, 2

Third period: 4, 5, 3, 4, 2, 3, 4, 1, 8, 2, 3, 1, 0, 2, 1, 3

What is the best measure of spread for the first period and why?

Answer:

d. distributive property

Option D is correct, distributive property of multiplication over subtraction​ is the property used by Evan in first step.

Two or more expressions with an Equal sign is called as Equation.

12x²- 7x = 6-2(x² - 1).

The first step written by Evan is 12x²- 7x = 6-2x² +2

We have to find the property which was used for the first step

In the equation splitted 2(x² - 1) using distributive property of multiplication over subtraction​.

The distributive property of multiplication over subtraction is applied when we multiply a value by the difference of two numbers.

Hence, option D is correct,  distributive property of multiplication over subtraction​ is the property used by Evan in first step.

To learn more on Equation:

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Answer:

nearest whole = 7740

nearest ten = 7740

nearest hundred = 7700

nearest thousand = 8000

Answer:

A) -43

Step-by-step explanation:

The absolute value is the distance from 0... which means you take the number and if there's a negative sign in front of it, you remove it.

-43 becomes 43 as an absolute value... so it's bigger than the others (23, 0, and 18).

Answer is then A) -43

Answer

4.8/5

30

We are given 12 to the 3rd power over 12 to 7th power.

First we write given expression as exponent form and we get It looks ..

If base is same in division then their exponent subtract.

Thus, It would be 1 over 12 to the 4th.

Answer:

Sub into equation

Step-by-step explanation:

Answer: 2.775%

Step-by-step explanation:

Given: Mean : [tex]\mu=3,500\ g[/tex]

Standard deviation: [tex]\sigma=500\ g[/tex]

The formula to calculate z-score is given by :-

[tex]z=\dfrac{x-\mu}{\sigma}[/tex]

For x= 2,500g

[tex]z=\dfrac{2500-3500}{500}=\dfrac{-1000}{500}=-2[/tex]

The p-value of z = P(z<-2)=0.02275

In percent, [tex]0.02775\times100=2.775\%[/tex]

The percent of babies born in the United States are classified as having a low birth weight (< 2,500 g) = 2.775%

Answer:

I think using factoring method would be the best because

Step-by-step explanation:

1) x^2-6=0

2) Factor out the X.  x*(x-6)=0

3) x* (x - 6) =0 When the product of factors equal zero at least one factor is zero.

x=0

x-6=0

4)Solve for "x-6=0" for X. Move constant to the right by adding its opposite to both sides  

x-6 +6 = 0 +6

Eliminate the opposites

x - 6 + 6 = 0 + 6

x= 0+6

x=6

5) the solutions are x1=0 and x2=6

Answer:

D (5,7.4)

Step-by-step explanation:

This is because all of the other (x,y) vales are close together in number and this is an outlier because it stands out from the group.

The answer is D. (5, 7.4)

284,000

(You would round up one because the number right before the thousands place is the hundred, which in our case, is above 4. As such, we are going to round up to 284,000.)

Hope I could help! :)

When rounding 283,657 to the nearest thousand, we look at the hundreds digit which is 6. Since it is greater than 5, we round up, resulting in a final rounded number of 284,000.

To round 283,657 to the nearest thousand, we look at the hundreds place to decide whether to round up or down. Since the hundreds digit is a '6' (which is greater than 5), we round up to the next thousand. Therefore, 283,657 rounded to the nearest thousand is 284,000.

Rounding rules dictate that if the digit to the right of the target rounding place is 5 or greater, we round up the target digit by one. In this case, we're rounding to the nearest thousand, so we look at the hundreds place which is a 6. Since it is greater than 5, we add one to the thousands place, changing 283,000 to 284,000, and set all the following digits to zero, giving us our final rounded number.

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Answer:

5/7 quart

Step-by-step explanation:

Amount = concentration × volume

Amounts added = final amount

100% × x + 20% × 5 = 30% × (x+5)

Solving for x:

1.00x + 0.2×5 = 0.3×(x+5)

x + 1 = 0.3x + 1.5

0.7x = 0.5

x = 5/7

x ≈ 0.7

You should add 5/7 quart of pure antifreeze, or about 0.7 quart.

About 0.71 quarts of pure antifreeze should be added to 5 quarts of a 20% antifreeze solution to obtain a 30% antifreeze solution.

To find out how many quarts of pure antifreeze must be added to 5 quarts of a 20% antifreeze solution to get a 30% antifreeze solution, we can set up the following equation:

0.2 * 5 + x = 0.3 * (5 + x) where x represents the amount of pure antifreeze to be added.

Solving this equation, we get:

1 + x = 1.5 + 0.3x,

This simplifies to 0.7x = 0.5,

So x = 0.5 / 0.7,

Therefore, About 0.71 quarts of pure antifreeze should be added to get a 30% solution.

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the answer is c. 16.4 feet in 5 meters

Answer:

16.4 ft

Step-by-step explanation:

We are given that Yvette measured the length of her driveway to be 5 meters long.

We have to find that which is equivalent to  given length in given options.

Measurement of length = 5 m

We know that 1 meter =3.28 foot

1 meter=1.09 yard

1 meter =39.37 inches

5 m= [tex]5\times 3.28=16.4  ft[/tex]

5 m=[tex]5\times .109=5.45 yard[/tex]

5 m=[tex]5\times 39.37=196.85 inches[/tex]

Hence, measurement of length =5 m =16.4 ft

Answer:

90°

Step-by-step explanation:

Two lines intersect each other at a right angle, making them perpendicular. Thus, the resulting angles will all be 90°, making ∠4 = 90°.

Alternatively, we can use the supplementary angles equation.

Let's call the right angle marked in the picture ∠5.

∠4 + ∠5 = 180°, since the line is also a straight angle which measures 180°.

∠4 + 90° = 180°

∠4 = 90°

Either way, ∠4 = 90°

Hope this helps!

Answer:

A and C

Step-by-step explanation:

The graph has a minimum U at vertex (1, 5) → A is true

The x- intercepts, where the graph crosses the x- axis are not as given

The axis of symmetry has equation x = c where c is the value of the x- coordinate the axis passes through.

The axis of symmetry passes through the vertex with equation

x = 1 → C

The graph does not have a maximum vertex ∩

Hello There!

So we divide fractions by multiplying by the reciprocal.

So let’s change 6/7 divided by 3/8 to 6/7 multiplied by 8/3.

Once we do that, we can start our multiplication.

Once we multiply, we get 48/21

We can both divide these by 3 to simplify it so once we divide we will get

16/7

This can be turned in a mix number and it would be 2 and 2/7

Answer:

the answer is d and please accept my friend request

Step-by-step explanation:

Answer:

5) x=30

6) x=50

7) x=59

8) x=31

9) m<1=75 because they're corresponding and m<2=105 because it's supplementary with the 75 degrees angle

10) m<1= 120 because they're corresponding and m<2=60 because they're consecutive interior angles and add up to 180

in questions 5-7 you just set them equal to each other

in 8, you had to subtract 105 from 180 and then set 75 equal to 3x-18

Answer:

Option B  13 units is correct.

Step-by-step explanation:

The formula used to find distance between 2 points is:

[tex]d(P1,P2)=\sqrt{(x_{2} -x_{1})^2 + (y_{2} -y_{1})^2 }[/tex]

x₁ = 12 x₂ = 0 y₁= 9 and y₂=4

Putting values in the formula:

[tex]=\sqrt{(0-12)^2+(4-9)^2}\\=\sqrt{(-12)^2+(-5)^2}\\=\sqrt{144+25} \\=\sqrt{169} \\=13[/tex]

So, Option B 13 units is correct.

Answer:

B) 13 units

Step-by-step explanation:

1) Use the equation for solving the distance between points:

√(x2 - x1)²+(y2-y1)²

2) In this case, we would plug them into the equation:

√(12-0)²+(9-4)²

3) Now, we simplify:

√(12)²+(5)²

4) We simplify even further:

√144+25

5) We add the two:

√169

6) Take the square root of √169:

13.

Answer: [tex](2g+h)[/tex] and [tex](2g-h)[/tex]

Step-by-step explanation:

The area of a rectangle is obtained by multiplying its lenght by its width.

You know that the area of this rectangle is [tex]4g^2- h^2[/tex], then you need to apply the Difference of squares to find the dimensions of this rectangle.

Remember that the Difference of squares is:

[tex]a^2-b^2=(a+b)(a-b)[/tex]

Then, applying this, you get:

 [tex]4g^2- h^2=(2g+h)(2g-h)[/tex]

Therefore, now you know that the dimensions are:

[tex](2g+h)[/tex] and [tex](2g-h)[/tex]

the length and breadth of rectangle are [tex]2g - h[/tex] and [tex]2g + h[/tex] respectively

The given expression for the area of the rectangle is [tex]4g^2 - h^2[/tex]

This expression is a difference of squares, which can be factored using the formula: [tex]a^2 - b^2 = (a - b)(a + b)[/tex]

Now by comparing both equations we can factor as follows:

[tex]4g^2 - h^2 = (2g)^2 - h^2\\\\4g^2 - h^2 = (2g+h)(2g-h)[/tex]

We know that area of a rectangle is a product of its length and breadth so we can say that:

Length: 2g - h

Breadth: 2g + h

So, the length and breadth of rectangle are [tex]2g - h[/tex] and [tex]2g + h[/tex] respectively

Answer:

LA = 322 meters squared

Step-by-step explanation:

LA = hp

= 26(2 + 5 + 5.39)

= 26(12.39)

= 322 meters squared rounded to the nearest whole number

The 4th choice

Answer:

It would be option D or option number 4.

Answer:

Is not a function

Step-by-step explanation:

A relation is a function  if each value of the input set (domain) is assigned only one value of the output set (range)

Given a function [tex]f(x)[/tex], the inverse of f denoted  [tex]f ^ {- 1}(x)[/tex] is a function only if f(x) is a one-to-one function. This means that there are not in the domain of [tex]f(x)[/tex] two distinct values of x that produce the same value of y.

In the graph of f(x) you can see that the function is not one-to-one. Since [tex]f(x) = (-x)[/tex] for all x.

For example:

[tex]f(1) = f (-1)\\\\f (2) = f (-2)\\\\[/tex]

Observe the attached graph

In general, the inverse of a quadratic function f(x) is not a function

Answer:

Option D. [tex]\frac{A}{B}*\frac{C}{D}=\frac{A*C}{B*D}[/tex]

Step-by-step explanation:

we have

[tex]\frac{A}{B}[/tex] and [tex]\frac{C}{D}[/tex]

we know that

To multiply fractions multiply the numerators of the fractions to get the new numerator and multiply the denominators of the fractions to get the new denominator

To divide two fractions, multiply the first fraction by the reciprocal of the second fraction

[tex]\frac{\frac{A}{B}}{\frac{C}{D}}=\frac{A}{B}*\frac{D}{C}[/tex]

and

[tex]\frac{A}{B}*\frac{C}{D}=\frac{A*C}{B*D}[/tex]

Answer:

Tj should write 5.75 hours on her time card.

Step-by-step explanation:

We have been given, Tj worked for 5 hours and 45 minutes.

We will convert 45 minutes to hours by dividing 45 by 60 as one hour has 60 minutes.

[tex]\frac{45 minutes }{60} \times\frac{hour}{minutes}[/tex]

=0.75 hours

Hence, Tj should write 5.75 hours on her time card.

Answer:

x = 108

Step-by-step explanation:

∠RQS = ∠QLK = x ( corresponding angles )

∠QLK and ∠KLM form a straight angle and are supplementary, thus

∠QLK + ∠KLM = 180 ← substitute values

x + x - 36 = 180

2x - 36 = 180 ( add 36 to both sides )

2x = 216 ( divide both sides by 2 )

x = 108

Answer:

108

Step-by-step explanation:

pretty much by simply solving for "y".

[tex]\bf 3x+2y=6\implies 2y=-3x+6\implies y=\cfrac{-3x+6}{2} \\\\\\ \underset{\textit{distributing the denominator}}{y=\cfrac{-3x}{2}+\cfrac{6}{2}~\hfill }\implies y=-\cfrac{3}{2}x+3\impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}[/tex]

Answer:

y = -3/2 x +3

Step-by-step explanation:

Slope intercept form is

y = mx+b  where m is the slope and b is the y intercept

3x+2y = 6

Subtract 3x from each side

3x-3x+2y = -3x+6

2y = -3x+6

Divide each side by 2

2y/2 = -3x/2 +6/2

y = -3/2 x +3

This is in slope intercept form where the slope is -3/2 and the y intercept is 3

Answer:

2 is C. , 3 is C. , 4 is D.  

Step-by-step explanation:

2

Square roots are not polynomials

3

The highest degree of one term in the polynomial is 4

4

Terms are separated by (+) or (-) signs. If you count them up there are 4

Answer:

C, D, D, B

Step-by-step explanation:

2. A polynomial has only integer exponents, no square roots.  So C is not a polynomial.

3. The degree of the polynomial is the sum of the exponents of the highest term.  p has an exponent of 1 and q has an exponent 4, so 1+4 = 5. D

4. Count the number of terms being added or subtracted.  p^3, 4pq^2, q^2, and -3q.  So there are 4 terms. D

5. Standard form of a polynomial is written from the highest exponent to the lowest.  So the answer is B.

There are many ways that graphs can be misleading. Depending on how you set up your graph, the same set of data can look very different. It's important to understand that there are some common mistakes to avoid when making graphs. In addition, advertisers have been known to intentionally make their graphs misleading to make their data match their point.  

In the image provided, this is a good example of a misleading graph.

First, notice that we know that the first bar is 10 and the second bar is 50. However, there are no labels on the horizontal or vertical axis so we don't know what the bars represent.

In addition, notice that there is no title on this graph. Since there is no title on the graph, we don't know anything about the data.

Further, look at the scale on the vertical axis. Notice that it's an uneven scale. The uneven scale makes it appear that the first bar is closer to the second bar than it actually is.

We could correct this graph by adding labels to the x and y-axis, adding a title to the graph, and making the scale on the vertical axis even.

Another way graphs can be misleading is using the wrong type to represent data. For example, a scatter plot might be better than a regular graph in some cases.

Lastly, graphs can be misleading by adding a wide range of numbers to show and increase or decrease relatively small to how it actually is.

Answer: hypothesis

Step-by-step explanation:

Answer:

The correct word is hypothesis.

Step-by-step explanation:

If a conditional statement is true and its HYPOTHESIS is true, then the conclusion is true.

The conditional statement is written in the following form -

If p is true, then q is true.

Here p is the hypothesis and q is the conclusion.

The opposite can be defined as - if the hypothesis is true and the conclusion is false, then the conditional statement is false.

well, the assumption is that is a rectangle, namely it has two equal pairs, so we can just find the length of one of the pairs to get the dimensions.

hmmmm let's say let's get the length of the segment at (-1,-3), (1,3) for its length

and

the length of the segment at (-1, -3), (-4, -2) for its width

[tex]\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ (\stackrel{x_1}{-1}~,~\stackrel{y_1}{-3})\qquad (\stackrel{x_2}{1}~,~\stackrel{y_2}{3})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ \stackrel{length}{L}=\sqrt{[1-(-1)]^2+[3-(-3)]^2}\implies L=\sqrt{(1+1)^2+(3+3)^2} \\\\\\ L=\sqrt{4+36}\implies L=\sqrt{40} \\\\[-0.35em] ~\dotfill[/tex]

[tex]\bf (\stackrel{x_1}{-1}~,~\stackrel{y_1}{-3})\qquad (\stackrel{x_2}{-4}~,~\stackrel{y_2}{-2})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ \stackrel{width}{w}=\sqrt{[-4-(-1)]^2+[-2-(-3)]^2}\implies w=\sqrt{(-4+1)^2+(-2+3)^2} \\\\\\ w=\sqrt{9+1}\implies w=\sqrt{10} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{area of the rectangle}}{A=Lw}\implies \sqrt{40}\cdot \sqrt{10}\implies \sqrt{400}\implies \boxed{20}[/tex]

Answer:

the graph will be vertically compressed i just answered apex

Step-by-step explanation:

Answer:

The graph will be compressed vertically.

Step-by-step explanation:

Answer:

48 objects

Step-by-step explanation:

we have

[tex]t=0.003x^{2}+0.001x[/tex]

where

t is the number of seconds

x is the number of objects

For t=7 sec

substitute in the equation and solve for x

[tex]7=0.003x^{2}+0.001x[/tex]

Solve the quadratic equation by graphing

The solution is x=48 objects

see the attached figure

ANSWER

See below

EXPLANATION

Given the system of linear equation:

[tex]y = m_1x + b_1[/tex]

[tex]y = m_2x + b_2[/tex]

If

[tex] m_1 \ne \: m_2[/tex]

then the two equations, will intersect at one. The system has unique solution.

If

[tex]m_1 =m_2 \: and \: b_1 \ne \: b_2[/tex]

then, the two equations are parallel and the system will not have a solution.

If

[tex]m_1 =m_2 \: and \: b_1 = \: b_2[/tex]

Then, the two equations will coincide.

There is infinitely many solutions.