I NEED SERIOUS HELP I AM HAVING MATH EXAM SOON
PLEASEEEEEEEEEE HELP ME IM PREPARING WITH THE PPTS MY TEACHERS HAVE GAVE ME BUT THEY GAVE NO ANSWER AND IM NOT ABLE TO SOLVE THIS(I asked this before itself but never got an answer so with extra details I'm hoping I will get some answers)

Answer:

7.07 cm

Step-by-step explanation:

we know,

circumference = 2πr

so,

2 × 22/7 × r = 66

44r = 66×7 = 462

r = 462/44 = 1.5

therefore, radius of the circle is 1.5 cm.

now,

we know , area = πr²

so,

22/7 × (1.5)²

22/7 × 2.25

49.5/7

7.07 cm (approx)

therefore, area of the circle is 7.07 cm (approx.)

hope this answer helps you!

Answer:

x = 6

Step-by-step explanation:

Answer:

But the actual solution is 63.

Step-by-step explanation:

55+8=63

63

3<5 so you don't round up, you round down.

Rounding down... 60

60

But the actual solution is 63.

Answer:

Ted can buy the three books for $16.99 each

Step-by-step explanation:

The two books will cost a total of $59.90

$29.95 • 2 = $59.90 OR $29.95 + $29.95 = $59.90

The headphones and portable speaker will cost a total of $60.94

$29.99 + $30.95 = $60.94

The MP3 player and gift card will cost a total of $55.99

$35.99 + $20.00 = $55.99

The three books will cost a total of $50.97

$16.99 • 3 = $50.97 OR $16.99 + $16.99 + $16.99 = $50.97

Three books for $16.99 each is able to purchase will he be able to pay for with cash.

To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.

Now, WE can simplify,

The two books will cost a total of,

⇒ $29.95 x 2 = $59.90

The headphones and portable speaker will cost a total of,

$29.99 + $30.95 = $60.94

The MP3 player and gift card will cost a total of ,

$35.99 + $20.00 = $55.99

The three books will cost a total of,

$16.99 x 3 = $50.97

Hence, three books for $16.99 each is able to purchase will he be able to pay for with cash.

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9514 1404 393

Answer:

  72.18°

Step-by-step explanation:

The altitude of the front is 28 ft. It cuts the base in half, so the other leg of the right triangle is (18 ft)/2 = 9 ft. You know the tangent relation is ...

  Tan = Opposite/Adjacent

The angle of interest has opposite side 28 ft and adjacent side 9 ft, so we have ...

  tan(elevation angle) = (28 ft)/(9 ft)

  elevation angle = arctan(28/9)

  elevation angle ≈ 72.18°

The most basic distinction between types of data is that some data are quantitative while other data are qualitative. Quantitative data consists of numerical information that can be measured or counted, allowing for statistical analysis and objective comparisons. This type of data can be further classified into two subcategories: continuous data and discrete data.

Continuous data represent measurements that can take on any value within a specified range, such as height, weight, temperature, or time. These measurements can be represented using fractions or decimals and are typically collected using precise instruments like rulers or thermometers.

Discrete data, on the other hand, consist of distinct, separate values that can be counted or categorized. Examples of discrete data include the number of students in a class, the number of cars in a parking lot, or the number of books sold in a month. Discrete data is often collected through surveys or counting processes.

In contrast, qualitative data are non-numerical and describe attributes, characteristics, or experiences. This type of data is typically obtained through observation, interviews, or open-ended survey questions. Examples of qualitative data include feelings, opinions, beliefs, or descriptions of events.

In summary, the primary distinction between types of data lies in their nature: quantitative data is numerical and allows for objective measurement, while qualitative data is descriptive and explores subjective aspects. Understanding the difference between these two types of data is essential for conducting accurate and meaningful research.

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Answer: \(-x^{2} +6x+2\)

The length will be 375 m.

The width will be 250 m.

What is perimeter?

The complete length of a shape's edge serves as its perimeter in geometric terms. Adding the lengths of all the sides and edges that surround a form yields its perimeter. It is calculated using linear length units such centimeters, meters, inches, and feet.

let the length be x and the width be w

The perimeter will be:

2x+3w=1500

thus

3w=(1500-2x)

w=(1500-2x)/3

w=500-2/3x

The area will be:

A=x*w

A=x(500-2/3x)

A=500x-(2/3)x²

The above is a quadratic equation; thus finding the axis of symmetry we will evaluate for the value of x that will give us maximum area.

Axis of symmetry:

x=-b/(2a)

from our equation:

a=(-2/3) and b=500

thus

x=-500/[2(-2/3)]

x=375

the length will be 375 m

The width will be 250 m

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Answer:

Square

4,4,4

Step-by-step explanation:

Step-by-step explanation:

x+ 172= 180-x

x+ 172= 180-x2x= 8

x+ 172= 180-x2x= 8x= 4°

180-4= 176

the angle is 4° and the measure of the other angle is 176°

Answer:

8

Step-by-step explanation:

Answer:

Step 1: 4

Step 2: 4 and 1

Step 3: 2x² + 4x + x + 2

Step 4: (2x² + 4x) + (x + 2)

Step 5: 2x(x + 2) + 1(x + 2)

Step 6: (x + 2)(2x + 1)

Step-by-step explanation:

The value of x is 40 degree and y is 105 degree.

Linear pair of angles are formed when two lines intersect each other at a single point. The angles are said to be linear if they are adjacent to each other after the intersection of the two lines. The sum of angles of a linear pair is always equal to 180°.

2x - 5 + 75=180

2x+70=180

x= 110/2

x= 55 degree.

Now, y=  2x-5 = 2(55)-5 = 110- 5 = 105  (Vertically opposite angle)

Hence, the value of x is 40 degree and y is 105 degree.

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9514 1404 393

Answer:

  a.  m∠C = 44°

  b.  m∠P = 60°

Step-by-step explanation:

In each case, the missing angle brings the sum of angles to 180°. So, its value is the difference between 180° and the sum of the given angles.

a.  m∠C = 180° -90° -46°

  m∠C = 44°

__

b.  m∠P = 180° -110° -10°

  m∠P = 60°

Answer:

A

Step-by-step explanation:

Point A

:] its ok we all dum sometimes lol

To find the standard deviation of the data summarized in the given frequency distribution, we can perform the following calculations. The table provides the necessary calculations for the standard deviation of the data summarized in the given frequency distribution:

Waiting time (minutes) Number of customer Midpoint (x) of Class Boundary of Class

f(x) 0-39 (0+3)/2=1.5 -0.5, 3.5+1.5 (9) (1.5) (9) = 13.5

4-7 16(4+7)/2=5.5 -3.5, 7.5+3.5 (16) (5.5) (16) = 88.0

8-11 15(8+11)/2=9.5 -7.5, 11.5+7.5 (15) (9.5) (15) = 213.75

12-15 8(12+15)/2=13.5 -11.5, 15.5+11.5 (8) (13.5) (8) = 91.875

16-20 2(16+20)/2=18 -16, 20+16 (2) (18) (2) = 92

Sum 60 (363.2)

Mean = Sum of (f(x)) / Sum of (f) = 363.2 / 60 = 6.0533

The variance, σ², can be calculated using the formula [Sum of (f(x²)) - {Sum of (f(x))² / Sum of (f)}] / (Sum of (f) - 1). Plugging in the values, we get:

σ² = [1103.2 - {363.2² / 60}] / (60 - 1) = 104.36

The standard deviation, σ, can be calculated using the formula √σ². Hence, the standard deviation of the data summarized in the given frequency distribution is approximately 10.2 minutes.

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Answer:

Step-by-step explanation:

(-2, 8)

(-1, 6)

(0, 4)

(1, 2)

(2,0)

to "show work" just plug in each x value into that equation. you will never learn if all you do is copy down answers. i have given you all of the correct answers, and all you need to do is plug in the values for each x value into the equation, multiply then add. good luck man.

Answer:

0.0089

Step-by-step explanation:

Because when we want to change decimal as percents we need to replace the period on the left side 2 times. But when we want to change percent as a decimal, then we need to move the period 2 times on the right.

ex:

.72 decimal= 0.0072

Answer:

89 as a percentage is 0.0089%

Answer:

t(3u)

Step-by-step explanation:

First we have to triple (x3) u, which is what gets us 3u.  Then we multiply that result by t.  

This gives us:  t(3u)

Remember, this problem is asking for you to write an expression, not and equation.  That is why there is not an equal sign included in the answer.

Answer:

"so i need to find e missing side of each right triangle, side c is the hypotenuse!! a = 8.8ft, b= 9ft i have to round the answers to the nearest tenth if necessary "

Step-by-step explanation:

Sure! So remember that the Pythagorean theorem is a squared plus b squared = c squared.

= 8.8 squared + 9 squared = c squared

= 77.44 + 81 = c squared

\(\sqrt{158.44}\) = c squared

c squared = (rounded) 12.6 ft

The 3 in the expression signifies the initial height of the ball when it is thrown, while the other terms describe the ball's motion under the influence of gravity and its initial velocity.

The expression given for the height of the ball above the ground is -16t^2 + 40t + 3, where t represents time in seconds. In this expression, the terms -16t^2, 40t, and 3 each have a specific meaning related to the motion of the ball.

The 3 in the expression represents the initial height of the ball above the ground when it is thrown, measured in feet. This means that at the moment the ball is thrown (t = 0), its height is already 3 feet above the ground. This could be due to the person's hand height or any elevated surface from which the ball was thrown.

The other terms in the expression, -16t^2 and 40t, are associated with the ball's motion in the air. The term -16t^2 reflects the effect of gravity, which causes the ball to decelerate as it rises and accelerate as it falls back down. The term 40t represents the initial velocity of the ball when it is thrown upwards, which influences the time it takes for the ball to reach its maximum height and the overall trajectory of its motion.

In summary, the 3 in the expression signifies the initial height of the ball when it is thrown, while the other terms describe the ball's motion under the influence of gravity and its initial velocity.

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Answer:

Standard form:   y = 2x² - 8x + 1

Step-by-step explanation:

We are given the following quadratic function, y = 2(x - 2)² - 7, for which we must transform in its standard form.

The vertex form of a quadratic function is y = a(x - h)² + k (which is the format of the given equation).

⇒  If the value of "a" is positive, then the vertex is its minimum or lowest point on the graph.

⇒  If the value of "a" is negative, then the vertex is the maximum or highest point  on the graph.

The standard form of a quadratic function is y = ax² + bx + c, where a ≠ 0.

The first step in rewriting the given equation into its standard form  is expanding the binomial using the FOIL method, which transforms it into a perfect square trinomial.  

y = 2(x - 2)² - 7

       ⇒   (x - 2)(x - 2)

       ⇒   [ x² - 2x - 2x + 4 ]

y = 2(x - 2)² - 7

y = 2(x² - 2x - 2x + 4) - 7

y = 2(x² - 2x - 2x + 4) - 7

y = 2x² - 4x - 4x + 8 - 7

y = 2x² - 8x + 1.

Therefore, the quadratic function in standard form is y = 2x² - 8x + 1, where a = 2, b = -8, and c = 1.

_____________________________

Quadratic equations

Parabola

Quadratic functions

Vertex form

Functions

______________________________

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Answer:

\(\displaystyle y = 2x^2 - 8x + 1\)

Step-by-step explanation:

All you are doing is perfourming order of operations and using the Distributive Property. Here is how it is done:

\(\displaystyle y = 2(x - 2)^2 - 7 \hookrightarrow y = 2(x^2 - 4x + 4) - 7 \hookrightarrow y = 2x^2 - 8x + 8 - 7 \\ \\ \boxed{y = 2x^2 - 8x + 1}\)

I am joyous to assist you at any time.

Your question is about the most appropriate statistic to measure agreement between Trisha and Fitz's study observations when Dr. Regent is evaluating the inter-rater reliability. The most appropriate statistic in this case would be Cohen's Kappa coefficient.

Step 1: Understand the terms
- Inter-rater reliability: This refers to the consistency between two or more independent raters or observers when assessing the same subject or phenomenon.
- Cohen's Kappa coefficient: A statistical measure used to evaluate the agreement between two raters, while accounting for the possibility of agreement occurring by chance.

Step 2: Apply the statistic
Dr. Regent should use Cohen's Kappa coefficient to measure the agreement between Trisha and Fitz's study observations, as it is specifically designed for assessing inter-rater reliability and takes into account the possibility of agreement by chance.

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The correct option is cone and plane. A conic section is the intersection of a plane and a cone. The best definition of a conic section is "cone and plane".

The definition of conic section is a conic section is a shape that is formed when a right circular cone intersects a plane. Depending on the angle of the plane concerning the center line of the cone, the conic sections are classified into four types. They are a circle, parabola, ellipse, and hyperbola. Each type of conic section has a unique shape and properties.

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Answer:

x-3=6

Step-by-step explanation:

Answer:

angle PSQ=25°

Step-by-step explanation:

angle RQS=angle PSQ.......... alternate angle

so angle PSQ=25°

Answer:

25 degrees

Step-by-step explanation:

If it is a parallelogram, then the sides PS and QR will be parallel, then ∠PSQ and ∠RQS are alternate interior angles, and hence they will be congruent. That is, ∠PSQ ≅ ∠RQS = 25°.

But this is not the confirmation that this would be parallelogram as it could be trapezoid. The given condition is must but not sufficient to prove it.

Hope this helps. Do mark me as BRAINLY. thanks

The parabola's equation is therefore for A: y  = 7x2 - 5$1.

As a result, the parabola's equation for B  is y = -1/2(x - 1)² + 4.

A parabola with vertex (h,k) has the basic equation y = a(x-h)² + k². In this instance, h=0 and k=-5 are equal because the vertex is at $(0,-5)$. Moreover, the parabola has a point at (-1 . 2). When we substitute these numbers in the general parabola equation, we obtain:

2 = a(-1-0)² -5

7 = a

The parabola's equation is therefore y = 7x2 - 5$1.

A cone and a plane perpendicular to its side cross to create a symmetrical open plane curve known as a parabola1. It is a U-shaped curve whose vertex and axis of symmetry characterise it. The line dividing the parabola into its two mirror counterparts is known as the axis of symmetry. The parabola's vertex is where the axis of symmetry intersects it.

A parabola's vertex is represented by the equation y = a(x - h)²+ k, where (h,k) represents the vertex. We may utilise the vertex version of the equation and substitute the values of h, k, and the x and y coordinates of the point to determine the equation of a parabola that passes through a particular point and has a certain vertex.

B.  Here, the vertex is (1, 4), and the point (5,-4). In the vertex form equation, we may therefore substitute h=1, k=4, x=5, and y=-4 to obtain:

-4 = a(5 - 1)²2 + 4 \s-8 = 16a

a = -1/2

As a result, the parabola's equation is y = -1/2(x - 1)² + 4.

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Answer:

The volume of the figure is 5376 in^3.

Step-by-step explanation:

First solve for the volume of the first rectangular prism. To do that you must multiply lwh. 24 x 12 x 17 = 4896.

Next solve for the volume of the next rectangular prism. Again multiply lwh,   10 x 4 x 12 = 480.

Then add up both of the volumes you found to get the volume of the whole figure. 4896 + 480 = 5376

Answer: The total volume is 5,376. Remember with volume you add up all the sides together.

Yes this is on the MAP testing 6+ 2012.