The Dot Plot shows the time trials of an experiment which number on the Dot Plot represents the amount of time in seconds it took to complete a trial how many trials were recorded during the experiment​

Answer:

Option B: [tex]\frac{5+a}{a-1}[/tex]

Step-by-step explanation:

Given function is:

[tex]f(x) = \frac{3+x}{x-3}[/tex]

In order to find f(a+2), we have to put a=2 in place of x in the function

So,

[tex]f(a+2) = \frac{3 + (a+2)}{(a+2)-3}\\ =\frac{3+a+2}{a+2-3}\\ = \frac{5+a}{a-1}[/tex]

Hence, we can see that option b is correct ..

Answer:

False

Step-by-step explanation:

Vertical angles are a pair of opposite angles created by intersecting lines. The Vertical Angles Theorem states that if two angles are vertical, then they are congruent.

Answer:

False.

Step-by-step explanation:

Supplementary angles always equal up to 180 degrees.

Answer:

[tex](x-5)(x+4)[/tex]

Step-by-step explanation:

We have the following quadratic equation

[tex]a^2-a-20[/tex]

The factored expression will have the following form

[tex](x+b)(x+c)[/tex]

Where b and c are two real numbers which when added together result in -1, and multiplying them results in -20

[tex]b*c=-20\\b+c=-1[/tex]

You can verify that the numbers that meet this condition are:

-5 and 4

Then the factors are:

[tex](x-5)(x+4)[/tex]

Answer: It is!!!!!!!!

Answer:

The correct option is C.

Step-by-step explanation:

The standard form of a parabola is

[tex]y=ax^2+bx+c[/tex]

The table of values represents the coordinate pairs of the parabola. It means the graph of the parabola must be passes through these coordinate pairs.

From the given table it is clear that the parabola passes through the points (0.5,21), (1,34) and (1.5,39).

[tex]21=a(0.5)^2+b(0.5)+c[/tex]

[tex]21=0.25a+0.5b+c[/tex]             .... (1)

[tex]34=a(1)^2+b(1)+c[/tex]

[tex]34=a+b+c[/tex]                      .... (2)

[tex]39=x(1.5)^2+y(1.5)+z[/tex]

[tex]39=2.15a+1.5b+c[/tex]            .... (3)

On solving (1), (2) and (3), we get

[tex]a=-16, b=50,c=0[/tex]

The equation of parabola is

[tex]y=-16x^2+50x+0[/tex]

[tex]y=-16x^2+50x[/tex]

The graph of parabola is shown below. It is same as graph in option C.

Therefore the correct option is C.

Answer: 7 boxes of carrots, 9 boxes of potatoes, 18 boxes total

Step-by-step explanation:

75 -68=7 boxes of carrots

80-71=9 boxes of potatoes

For this case we have:

x: Represents the number of carrot boxes

y: Represents the number of boxes of potatoes

Initially we have:

[tex]x = 75\\y = 80[/tex]

If you sold 68 boxes of carrot we have:

[tex]x = 75-68 = 7[/tex]

If you sold 71 boxes of potatoes, we have:

[tex]y = 80-71 = 9[/tex]

The number of boxes I take home is given by:[tex]x + y = 7 + 9 = 16[/tex]

ANswer:

7 boxes of carrots left

There are 9 boxes of potatoes left

A total of 16 boxes remain

Answer:

sin(arccos(-4/√25)) = 0.6

Step-by-step explanation:

The expression you want to evaluate is

sin(arccos(-4/√25))

= sin(arccos(-4/5))

We place this expression into a calculator and get the result

arccos(-4/5) = 2.498 rads = 143.1°

then

sin(143.1°) = 3/5

sin(143.1°) = 0.6

sin(arccos(-4/√25)) = 0.6

Answer:

The value of x=6 and y=4.

Answer:

(6, 4 )

Step-by-step explanation:

Given the 2 equations

4x - 3y = 12 → (1)

x + 2y = 14 → (2)

Multiplying (2) by - 4 and adding to (1) will eliminate the y- term

- 4x - 8y = - 56 → (3)

Add (1) and (3) term by term

(4x - 4x) + (- 3y - 8y) = (12 - 56) ← simplify

- 11y = - 44 ( divide both sides by - 11 )

y = 4

Substitute y = 4 into either (1) or (2)

(2 ) : x + 8 = 14 ( subtract 8 from both sides )

x = 6

Solution is (6, 4 )

Answer:

The missing number (i.e. the coefficient of x) is 5.

Step-by-step explanation:

5x - 8 - 9x = -4x + 8

-4x - 8 = -4x + 8

-8 ≠ 8

Answer:

D

Step-by-step explanation:

A difference of squares is represented in general as

a² - b²

Both variables have an even power (2) → a

There are only two terms → b

Answer:

See attached images

Step-by-step explanation:

The expression of your question is

f(x) = 2x^2+8x-7

A full analysis of the function is shown in the images below

Answer:

The correct answer will be "588 square centimeters"

Step-by-step explanation:

The answer would be 588 squared cm because the area of a triangle is 1/2(base*height).

and The base is 42 cm and the height is 28 cm.

588 square centimeters is the correct answer !

Answer:

C) 588

Step-by-step explanation:

A= 1/2 b*h

First you need to find the base and height

Which is 42 and 28

42*28=1176

1176/2= 588

Answer:

f(-2.2) = 1

Step-by-step explanation:

There is a horizontal blue line with equation y = 1 between x = -3 and x = -2.  Thus, f(-2.2) = 1.

Answer:

f(-2.2) = 1

Step-by-step explanation:

There is a horizontal blue line with equation y = 1 between x = -3 and x = -2. Thus, f(-2.2) = 1.

Answer:

97.79

Step-by-step explanation:

1062.98 * 0.092 = 97.79416

To the nearest hundredth would be to the second 9. Since 4 is less than 5 just drop the 4 and anything after it.

Answer:

3*5=15

15 is your answer

ANSWER

15 square units.

EXPLANATION

Each box is 1 square units.

When we count the number of boxes we obtain 15 boxes.

This implies that the area of the rectangle is 15 square units.

Alternatively, we can observe that:

The rectangle is a 3 by 5 rectangle.

So the area is

[tex]3 \times 5 = 15 \: units \: square[/tex]

The rectangle is 15 units square.

Answer:

4(x-7)^2 - 19

Step-by-step explanation:

Shifting 7 units to the right:  4(x-7)^2 - 16.

3 units down:                         4(x-7)^2 - 16 - 3, or    4(x-7)^2 - 19

Plug in values.

xy=

6(3) =

18 = Answer

Answer: I believe nine

Step-by-step explanation: If one and 11 stay in the same place then it would start as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11. then it would be 1, 10, 2, 3, 4, 5, 6, 7, 8, 9, 11. then 1, 9, 10, 2, 3, 4, 5, 6, 7, 8,11 and so one.

To simplify an expression you need to combine like terms.

In  the given equation, there are two like terms, 5r and 9r.

There is a plus sing in front of each one, so add those together: 5r + 9r = 14r

There are no ther like terms so the simplified expresssion becomes:

8w + 14r - t

Answer:D

Step-by-step explanation: 4y-3x=4    -2x-8y=8

                                        4(-.5)-3(-2)=4    -2(-2)-8(-.5)=8

Work this problem from here

4*-.5= -2

-3*-2=6

6+-2=4

so this is a true statement

-2*-2=4

-8*-.5=4

4+4= 8

so this statement is also true

Answer:

Remember, 1 is the multiplicative identity.  That means that we can multiply a value by 1 and not change the value, only change the units.

For example:  If we have 3 dozen eggs, how many eggs do we have?

             3 dozen

          (3 dozen)*(12 eggs / 1 dozen) = 36 eggs    (dozen cancels out, leaving only eggs)

In this problem:

   (16 miles / 1 week)

   (16 miles / 1 week)*(52 weeks / 1 year)       (weeks cancel out, leaving miles/year)

   832 miles/year

Note: with either 365 (or 366) days in a year, there are 365/7 = 52.14 weeks in a year, but we'll use 52 because the problem gave miles/week.

Step-by-step explanation:

Answer:

13. 23/4

14. 13/2

15. 6 and 1/2

16. 2 and 7/12

Answer:

13. 23/4

14. 13/2

15. [tex]6\frac{1}{2}[/tex]

16. [tex]2 \frac{7}{12}[/tex]

Step-by-step explanation:

13) 5×4=20

    20+3=23

    [tex]\frac{23}{4}[/tex]

14) 2×6=12

     12+1=13

     [tex]\frac{13}{2}[/tex]

15 an 16 divide

Answer:

a)  [tex]240\degree[/tex]

b) [tex]\frac{15\pi}{4}[/tex]

Step-by-step explanation:

Coterminal angles have the same terminal sides in standard position.

a) To find an angle between [tex]0\degree[/tex] and [tex]360\degree[/tex], that is coterminal with [tex]-120\degree[/tex], we keep adding multiples of [tex]360\degree[/tex] until we get an angle within the specified range.

 [tex]-120\degree \implies -120\degree +360\degree=240\degree[/tex].

In some cases you would have to subtract in order to get the specified angle. That is when the angle given is positive.

b) This time we want to find an that coterminal with [tex]\frac{15\pi}{4}[/tex] radians.

We keep subtracting multiples of [tex]2\pi[/tex] until we get an angle measure within the specified range.

[tex]\frac{15\pi}{4}=\frac{15\pi}{4}-2\pi=\frac{7\pi}{4}[/tex]

Answer: y= -2x+2

Step-by-step explanation: y-y₁=m(x-x₁)

y-(-6)= -2(x-4)

y+6=-2x+8

y=-2x+8-6

y= -2x+2

Answer:

Step-by-step explanation:

The point-slope form of an equation of a line:

[tex]y-y_1=m(x-x_1)[/tex]

m - slope

We have the slope m = -2 and the point (4, -6). Substitute:

[tex]y-(-6)=-2(x-4)\\\\y+6=-2(x-4)[/tex]

Answer:

[tex]2\frac{2}{9} hrs[/tex]

Step-by-step explanation:

At a speed of 50m/h time taken is 2hours

At a speed of 45m/h time take is 2.5 hours

You can find the distance between A and B

Distance=speed × time

[tex]D=50*2=100\\[/tex]

But time y varies inversely with speed x , hence

[tex]y=\frac{k}{x}[/tex]

where k is a constant of proportionality and D is distance.

To find k

[tex]2=\frac{k}{50} \\\\2*50=k\\\\100=k\\\\y=\frac{100}{x}[/tex]

where y is time and x is speed

Given

x=45m/h  you should find time y. Apply the expression above

[tex]y=\frac{100}{x} \\\\\\y=\frac{100}{45} =\frac{20}{9} =2\frac{2}{9} hrs[/tex]

Answer:

15+25d=t

Step-by-step explanation:

the initial value is 15 it increases(+) by 25 to each kilometer(distance=d) of depth.

The equation that models the relationship between distance d in kilometers and temperature t in degrees Celsius is t = 25d + 15. This means that for each kilometer increase in depth, the temperature increases by 25 degrees Celsius in addition to the initial 15 degrees Celsius surface temperature.

The relationship between the variables, distance (d) and temperature (t), is described as a linear function. Given that the surface temperature is 15 degrees Celsius and it increases by 25 degrees Celsius with every kilometer, the mathematical model is expressed as:

t = 25d + 15

In this equation, t represents the temperature and d is the distance from the surface in kilometers. This implies that for every kilometer increase in depth, the temperature increases by 25 degrees Celsius on top of the initial 15 degrees Celsius surface temperature.

https://brainly.com/question/32634451

#SPJ2

Answer:

[tex]<CGF = 130[/tex]

Step-by-step explanation:

A triangle adds up to 180.

180 - 50 = 130

Since both of the missing angles are congruent each of the missing angles is 65 degrees.

130/2 = 65

As per the exterior angle theorem, the measure of the exterior angle is determined by the sum of the opposite interior angles.

65 + 65 = 130

So, the measure of [tex]<CGF = 130[/tex]

Answer:

The correct answer is last option  

10

Step-by-step explanation:

Points to remember

Distance formula

Length of a line segment with end points (x1, y1) and (x2, y2) is given by,

Distance = √[(x2 - x1)² + (y2 - y1)²]

To find the distance between given points

Here  (x1, y1) = R(0, 0)  and (x2, y2)  = S(6, 8)

Distance, RS = √[(x2 - x1)² + (y2 - y1)²]

 = √[(6 - 0)² + (8 - 0)²]

 = √[6² + 8²]

 = √[36 + 64]

 = √100

 = 10

Therefore the correct answer is last option  10

Answer:

58%

Step-by-step explanation:

The change between 12 to 19 is 7

The percentage of change is calculated by dividing 7 by 12 and multiplying it by 100%

7/12*100

=58.3333333%

=58%(rounded to nearest percent)

58% increase

Percent change = 19 - 1212 × 100 = 58.333333333333 % (increase) Where: 12 and 19 is the new value. In this case we have % of increase because the new value is greater than the old value.

Percent change differs by the percent increase or percent decrease of the sense that we could see both directions of the change. For example, the percent increase calculator calculates amount of increase, in which we shall say, "x percent increase".

The change between 12 to 19 is 7

The percentage of change is calculated by dividing 7 by 12 and multiplying it by 100%

7/12*100

=58.3333333%

=58%(rounded to nearest percent)

Learn more about percentage change here https://brainly.com/question/14979505

#SPJ2

Answer:

f(4) = 4

Step-by-step explanation:

F(x)=1/4•2^x

Let x = 4

F(4)=1/4•2^4

      = 1/4 * 2^4

      = 1/4 *16

      = 4

Answer: f(4) = 4

Step-by-step explanation:

f(x) = 1/4 . 2^x

To find f(4) we simply replace x by 4 in the above equation;

f(4) =1/4 . 2^4

f(4) = 1/4 . 16

f(4) = 16/4

f(4) = 4

Therefore f(4) is equal to 4

Answer:

Explanation:

In order to calculate the variance and standard deviation of a set of data, you first must calculate the mean.

Mean = average = μ = ∑ values / (number of data)

Hence, the mean of our data set is:

Now you can calcuate the variance using the formula.

For a data set (which is all your population and not a sample) the formula is:

That is:

The standard deviation, S.D., is the square root of the variance:

Answer:

Variance = 8732.24 and standard deviation = 93.45

Step-by-step explanation:

We have to calculate the variance and standard deviation of the data set

3,832, 3,779, 3,655, 3,642, 3,579

First we calculate the mean of the data

Mean = [tex]\frac{(3,832+3,779+3,655+3,642+3,579)}{5}[/tex]

         = [tex]\frac{18487}{5}[/tex]

         = 3697.4

Now we calculate the variance by subtracting the mean from value of data set and square it.

3832 - 3697.4 = 134.6² =  18,117.16

3779 - 3697.4 = 81.6² = 6,658.56

3655 - 3697.4 = -42.4² = 1,797.76

3642 - 3697.4 = -55.4 = 3069.16

3579 - 3697.4 = -118.4 = 14,018.56

Add up the squared result and take the mean

=  [tex]\frac{(18117.16+6658.56+1797.76+3069.16+14018.56)}{5}[/tex]

=  [tex]\frac{43661.2}{5}[/tex]

Variance = 8732.24

To calculate standard deviation, we take the square root of the variance = [tex]\sqrt{8732.24}[/tex]

Standard deviation = 93.44645526 ≈ 93.45

Variance = 8732.24 and standard deviation = 93.45