true or false: b) If a line contains a center of a circle, it is a secant of the circle. (c If 2 chords intersect a circle, they intercept equal arcs. d) If a line is perpendicular to a diameter at one of its endpoints, then it is tangent to the circle. e) Inscribed angle that intercept equal arcs are equal.

Answer:

f(x) = 3x - 3

Step-by-step explanation:

Plug into TI-83/84 calculator.

Hit STAT

Hit EDIT

X-Values go in for L1

Y-Values go in for L2

Hit STAT

Scroll over to CALC

Hit #4 for LinReg (Finds line of best fit)

Enter all the way through

A is your slope

B is your y-intercept

Answer:

[tex]f(x)=3x-3[/tex]  

Step-by-step explanation:

Data : (-2,-9), (0,-3), (1,0), (3,6), (5,12)

Using technology , Plot the points on the calculator .

(Refer the attached figure)

Or

First calculate the slope of given points

[tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]   ---A

[tex](x_1,y_1)=(-2,-9)[/tex]

[tex](x_2,y_2)=(0,-3)[/tex]

Substitute values in A

[tex]m = \frac{-3-(-9)}{0-(-2)}[/tex]

[tex]m = \frac{-3+9}{2}[/tex]

[tex]m = \frac{6}{2}[/tex]

[tex]m = 3[/tex]

[tex](x_1,y_1)=(1,0)[/tex]

[tex](x_2,y_2)=(3,6)[/tex]

Substitute values in A

[tex]m = \frac{6-0}{3-1}[/tex]

[tex]m = \frac{6}{2}[/tex]

[tex]m = 3[/tex]

Since the slopes are same .

So, the the given data is a linear function.

Now to obtain the equation for data we will use two point slope form.

[tex]y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)[/tex]   ---B

[tex](x_1,y_1)=(-2,-9)[/tex]

[tex](x_2,y_2)=(0,-3)[/tex]

Substitute values in B

[tex]y+9= \frac{-3-(-9)}{0-(-2)}(x+2)[/tex]  

[tex]y+9= \frac{6}{2}(x+2)[/tex]  

[tex]y+9=3(x+2)[/tex]  

[tex]y+9=3x+6[/tex]  

[tex]y=3x+6-9[/tex]  

[tex]y=3x-3[/tex]  

So, [tex]f(x)=y=3x-3[/tex]  

Thus Option B is true .

Hence the required equation is  [tex]f(x)=3x-3[/tex]  

Answer:

I'm not 100% sure on this but I think it would be C- 8.1

Step-by-step explanation:

Answer:

(24) is the homogeneous mixture

Answer:

381.5 cubic inches

Step-by-step explanation:

Answer:

302 m³

Step-by-step explanation:

The volume (V) of a cone is calculated using the formula

V = [tex]\frac{1}{3}[/tex] πr²h

where r is the radius and h the height

Consider the right triangle from the vertex of the cone to the midpoint of the base and the radius

with hypotenuse = 10 cm

h² + 6² = 10²

h² + 36 = 100 ( subtract 36 from both sides )

h² = 64 ( take the square root of both sides )

h = [tex]\sqrt{64}[/tex] = 8

Hence

V = [tex]\frac{1}{3}[/tex] π × 6² × 8

  = [tex]\frac{1}{3}[/tex] π × 36 × 8

   = [tex]\frac{36(8)\pi }{3}[/tex] ≈ 302 m³

Answer:

18.

Step-by-step explanation:

y^2 = 2x + 6

2x = y^2 - 6

x = 1/2(y^2 - 6)

The points of intersection of the  curves are  calculated:

y + 1 = 1/2( y^2 - 6)

2y + 2 = y^2 - 6

y^2 - 2y - 8 = 0

( y - 4)(y + 2) = 0

y = 4, -2

when y = 4, x = 5 and when y = -2 x = -1.

Integrating between  y = 4 and y = -2

      4

      INT  [ ( y + 1 + 1/2 (6 - y^2) ]dy

      -2

=    4

     {   y^2 / 2 + y + 3y - y^3/6 }

  -2

= 13 1/3 - (-4 2/3)

13 1/3 + 4 2/3

= 18  answer.

The area bounded by the two given curves which are y² = 2x + 6 and x = y + 1 is; 18

We want to find the area bounded by the curves;

y² = 2x + 6 and x = y + 1

Put y + 1 for x in first equation to get;

y² = 2(y + 1) + 6

y² - 2y - 8 = 0

Using quadratic equation calculator gives;

y = -2, 4

Now, we can rewrite the first two equations like this;

x = (y²/2) - 3 and x = y + 1

Thus, the area is;

A = [tex]\int\limits^4_{-2}[/tex]  [y + 1 - (¹/₂y² - 3)]dy

Integrating this gives us;

A = [4y + ¹/₂y² - ¹/₆y³]⁴₋₂

Solving by plugging in the boundary values gives;

A = 18

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Answer: $186.25

Step-by-step explanation:

To find the original price of the Digital Media Player before the 20% reduction, you can follow these steps:
1. Understand the discount:
A 20% reduction means the item is sold for 80% of its original price (100% - 20% = 80%).
2. Set up the equation to represent this situation:
Let the original price be \( P \). If the player is marked down by 20%, then it is now being sold for 80% of its original price. So we can write the following equation:
\[ 0.80 \cdot P = 149 \]
3. Solve for \( P \) (the original price):
To find the original price, divide the reduced price by 0.80 (which represents the 80% it is now being sold for).
\[ P = \frac{149}{0.80} \]
4. Calculate the result:
\[ P = \frac{149}{0.80} \]
\[ P = 186.25 \]
So the original price of the Digital Media Player was $186.25.

Answer:

The sine function is y = 4 sin (4 x) - 3

Step-by-step explanation:

The explanation in the attached file

Answer:

50

Step-by-step explanation:

Divided $225 divided by $15 which equal $15 then divided $750 divided by 15 which equal $50.

Thelma and Laura need to mow at least 65 lawns to make a profit of $750 after accounting for the $225 cost of the lawnmower. They must charge $15 per lawn to meet this goal.

Let's define x as the number of lawns mowed. Thelma and Laura charge $15 per lawn mowed, so the total money they make through mowing lawns is $15x. They initially spent $225 for a lawnmower, and they want to make a profit of at least $750. Profit is calculated as revenue (money made) minus costs, so we have the inequality $15x - $225 >= $750. Simplify this inequality to get x >= 65. Therefore, they need to mow at least 65 lawns in order to make their desired profit.

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Answer:

40 mph and 68 mph

Step-by-step explanation:

Let x mph be the speed of the slower car, then 2x-12 mph is the speed of the faster car.

In 6 hours the faster car got to San Diego, so it travels the distance

[tex]6\cdot (2x-12)=12x-72\ miles.[/tex]

By that time the slower car was 168 miles away from the destination, so the slower car travels the distance

[tex]12x-72-168=2x-240\ miles[/tex]

It takes the slower car 6 hours to travel 12x-240 miles, so

[tex]6x=12x-240\\ \\6x-12x=-240\\ \\-6x=-240\\ \\6x=240\\ \\x=40\ mph.[/tex]

Now,

[tex]2x-12=2\cdot 40-12=80-12=68\ mph[/tex]

if your teacher allows the pi symbol then your answer is 2513. if your teacher requires you to use 3.14 for pi then your answer is 2512. basically you use the Pythagorean theorem to find the height, and then plug the height (24) and the radius which is half the diameter (10) into the equation to find the volume of the cone. if you have any other questions about it please ask! hope this helps:)

To find the vertex of a parabola given an equation, you can use the formula x = -b/2a to find the x-coordinate and then substitute it back to find the y-coordinate.

The equation of the parabola is given as y = -1/4x² + 4x - 19. To find the coordinates of the vertex, we use the formula x = -b/2a to find the x-coordinate, and then substitute it back into the equation to find the y-coordinate.

Here, a = -1/4 and b = 4. Plugging these values into x = -b/2a, we get x = -4/(2×(-1/4)) = 4. Substituting x = 4 back into the equation gives us y = -1/4(4)² + 4(4) - 19 = -1.

Therefore, the coordinates of the vertex of the parabola are (4, -1).

Answer:

A

Step-by-step explanation:

Group the 4 terms into groups of 2 without changing their order.  That looks like this:

[tex](2x^3+6x^2)+(5x+15)[/tex]

Now within each group pull out what's common:

[tex]2x^2(x+3)+5(x+3)[/tex]

Now we have (x + 3) common between the 2 terms, so let's pull that out.  With grouping, you know that it "works" if what's in the parenthesis are both exactly the same term.  Ours are both (x + 3).  What's "left over" are the things we originally pulled out, so group those together and you're done!

[tex](x+3)(2x^2+5)[/tex]

It intersects both nappes of the double napped cone, but does not go through the vertex. This weird intersection will create a conic curve that is called the...

The cross-section that is obtained on slicing the double napped cone such that it does not pass through the vertex of the cone is:

                                Hyperbola.

We know when a plane intersects only one nape of a double napped cone then the cross section that is obtained is either a parabola, ellipse or a circle.

But when it passes through both the napes of a double napped cone then the cross-section obtained is a hyperbola.

               Hence, the answer is Hyperbola.

Answer:

infinite number of solutions

Step-by-step explanation:

Given

8(x - 3) = 8x - 24 ← distribute left side

8x - 24 = 8x - 24

The expressions on both sides are equal

Hence any real value of x is a solution

That is there are an infinite number of solutions

Triangle XYZ is a right triangle.

What value should f be to yield 90 degrees?

6(3f - 15)°.

Let f be 8, 10, 12, 15.

When f = 10, we get 90 degrees for angle Z.

Z = 6(3•10 - 15)

Z = 6(30 - 15)

Z = 6(15)

Z = 90

Answer: Choice B.

okay so your answer would be  B.)  f=10

Answer:

31,2

Step-by-step explanation:

we can represent the numbers with two variables, x and y.

So the difference of them is 29.

x-y=29

Their sum is 33.

x+y=33

we can find the answer with a system of equations.

[tex]\left \{ {{x-y=29} \atop {x+y=33}} \right.[/tex]

x=29+y                    x=31        S{31,2}

y+29+y=33

2y=4

y=2

Answer:

x=31, y=2. (31, 2).

Step-by-step explanation:

x-y=29

x+y=33

------------

x=y+29

y+29+y=33

2y+29=33

2y=33-29

2y=4

y=4/2

y=2

x-2=29

x=29+2

x=31

Answer:

2264 students

Step-by-step explanation:

3330/100=33.3

100-32=68

33.3 x 68=2264.4

Hope This Helps! :D

Answer:

2264 students get 8 or more hours of sleep.

Step-by-step explanation:

We are given that 32% of students say they get less than the recommended eight hours of sleep per night.

We are to find the number of students who get 8 or more hours of sleep.

Percentage of students who get 8+ hours of sleep = 100 - 32 = 68%

Number of students who get 8 or more hours = 68/100 - 3330 = 2264

Answer:

y = 105°

Step-by-step explanation:

In an isosceles trapezoid

• Any lower base angle is supplementary to any upper base angle

• The lower base angles are congruent

75 and x are supplementary, thus

x = 180° - 75° = 105°

x and y are lower base angles and congruent, so

y = x = 105°

y=2x-10

x=2y-10

x+10=2y

x+10/2=y

final answer: y=(x+10)/2

Answer:

[tex]\large\boxed{f^{-1}(x)=\dfrac{1}{2}x+5}[/tex]

Step-by-step explanation:

[tex]f(x)=2x-10\to y=2x-10\\\\\text{we exchange each other x and y}\\\\x=2y-10\\\\\text{solve for y}\\\\2y-10=x\qquad\text{add 10 to both sides}\\\\2y=x+10\qquad\text{divide both sides by 2}\\\\y=\dfrac{1}{2}x+5[/tex]

Range is subtracting the biggest value and the smallest value of the data. For this set of data the range is:

9 - 3 -------------------------------> 6

Mode is the number that appears most often. In this set of data no number appears more than twice so mode is not applicable

Median is the middle of the numbers when ordered from least to greatest. For this set of the data the median is:

3  4  6  8  9

    4  6  8  

        6

Mean is adding all the number together then dividing the sum by how many numbers there are in the data. For this data the mean is:

(3 + 4 + 6 + 8 + 9) ÷ 5

(30) ÷ 5 ------------------------------------> 6

As you can see the range, median, and mean all have the value of 6

Hope this helped!

The range, median and mean of this data all have the value 6.

Mean- The average value of a data set is the same as the mean.

Mode-  The mode is the number that appears the most frequently in a data set.

Range-  In a frequency distribution, range is the difference between the highest and lowest observation.

Median- The median of a data collection is the number in the middle.

Range of the given data set = Highest value - Lowest value

Range of the given data set  = 9 - 3 = 6

Mean of the given data set = Sum of observations / total observations

Mean of the given data set = (3 + 4 + 6 + 8 +9)/5

Mean of the given data set  = 30 / 5 = 6

Mode of this set = All the numbers are there only once

Median of this data set = Out of the given five observations, 3rd term is the middle value which is equal to 6.

Hence median, mean and range of this data have the value 6.

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Answer:

zero

Step-by-step explanation:

Given a rational function then the denominator cannot be zero as this would make the function undefined.

Answer:

zero

Step-by-step explanation:

We have to fill the correct word in the blank space.

Suppose

[tex]f(x)=\frac{1}{x}[/tex]

Substitute x=0 then we get

[tex]f(x)=\frac{1}{0}=\infty[/tex]

The function is not defined at x=0

Because the denominator of the function at x=0 is zero which makes the function not define.

When the definition of a function involves  a fraction , the function is undefined at any value that would make the denominator of the function zero.

Answer:

[tex]\frac{\sqrt{17} }{7}[/tex]

Step-by-step explanation:

Using the Pythagorean identity

sin²x + cos²x = 1, then

sinx = [tex]\sqrt{1-cos^2x}[/tex]

Note that ([tex]\frac{4\sqrt{2} }{7}[/tex])² = [tex]\frac{32}{49}[/tex]

sinΘ = [tex]\sqrt{1-(32/49)}[/tex]

        = [tex]\sqrt{\frac{17}{49} }[/tex] = [tex]\frac{\sqrt{17} }{7}[/tex]

Answer:

2196

Step-by-step explanation:

3^2 = 9

9+3^7 = 2196

ANSWER

21

EXPLANATION

The given by binomial expression is:

[tex]( {x}^{2} + y)^{7} [/tex]

Comparing this to

[tex](a+ b)^{n} [/tex]

We have:

[tex]n = 7[/tex]

[tex]a = {x}^{2} [/tex]

[tex]b = y[/tex]

The coefficient of the (r+1)th term is given by:

[tex] \binom{n}{r} [/tex]

We want to find the coefficient of the third term:

[tex]r + 1 = 3[/tex]

[tex]r = 2[/tex]

Therefore the coefficient is:

[tex]\binom{7}{2} = 21[/tex]

The coefficient of the third term is 21.

Answer:

30

Step-by-step explanation:

The population mean can be estimated with the sample average, so add up all the ages and divide by how many there are.

(19 + 27 + 25 + 21 + 44 + 22 + 45 + 34) / 8

29.625

Rounded to the nearest whole number, the average age is 30.

Step-by-step explanation:

The population is all possible apartments that Greg could rent.  The sample is the ones he finds listed in newspapers and online.

So the answer is the third one.

The sample represents a part of the population from which data is actually taken. In this scenario, the apartments listed in the newspaper and Internet site are the sample, and all the apartments near the college form the population. Therefore, the correct answer is C.

In this question, Greg is trying to estimate the cost of living in an apartment. The population refers to the entire group of entities from which he might theoretically collect data. In this case, the population would be all available apartments near the college. That's because these apartments represent the full scope of possible information Greg would need for his research.

On the other hand, the sample is a subset of this population that Greg is actually reviewing for data. In this case, it would be the listings in a local newspaper and on an Internet site since these listings are the specific data points that Greg is examining.

So, the correct answer is C: 'Sample: listings in a local newspaper and on an Internet site; Population: all available apartments near the college'

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Answer: Option C.

Step-by-step explanation:

The volume of a sphere can be calculated with this formula:

[tex]V=\frac{4}{3}\pi r^3[/tex]

Where "r" is the radius.

You can observe in the figure that the value of the radius of this sphere is:

[tex]r=4\ units[/tex]

Then you can substitute this radius into the formula [tex]V=\frac{4}{3}\pi r^3[/tex].

Therefore, the volume of the sphere shown in the figure is:

[tex]V=\frac{4}{3}\pi (4units)^3[/tex]

[tex]V=\frac{256}{3}\pi \ units^3[/tex]

Answer:

c

Step-by-step explanation:

Answer:

The correct answer option is C. [tex]4\sqrt{3}[/tex].

Step-by-step explanation:

We are given an equilateral triangle which is divided into two equal halves and that makes two right angled triangles with known measures of angles.

We are to find the length of the altitude of the triangle. For that we can use the trigonometric ratios.

[tex]sin 60 = \frac{a}{8}[/tex]

[tex]\frac{\sqrt{3} }{2} =\frac{a}{8}[/tex]

[tex]a= \frac{\sqrt{3} }{2} \times 8[/tex]

[tex]a = 4\sqrt{3}[/tex]

Therefore, the correct answer option is C. [tex]4\sqrt{3}[/tex].

Answer:

The correct answer option is C. . \

Answer:

  -12

Step-by-step explanation:

To put the equation into vertex form, you can factor out the leading coefficient, then add and subtract a value equal to the square of half the x-coefficient (inside parentheses).

  = 4(x^2 +2x) -8

  = 4(x^2 +2x +1) -8 -4

  = 4(x +1)^2 -12

The y-value of the vertex is -12.

The answer would be -12

Ted's debt can be expressed as 2w - 28

Data;

This is a mathematical expression written to represent word problems.

Given that Ted's debt is 14 less than half of Mike's debt and Mike's debt is represented as w.

Let x represent Ted's debt

[tex]x = \frac{w}{2} - 14\\ x = 2w -28[/tex]

The expression can be written as 2w - 28

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Answer:

Linear

Step-by-step explanation:

It is not quadratic or exponential since the term to term sequence is +2.

- 5 ⇔ -3

( Adding 2 )

- 3 ⇔ -1

( Adding 2 )

- 1 ⇔ 1

( Adding 2 )