Answer:
1) biased sample
2) random sampling
Step-by-step explanation:
Since the results are based on feedback of students in only one class, it's not a good representative of the entire student body.
Also, since it's a math class there will be a bias.
Better method would be randomly selecting students from the entire school students list and take their feedback
Help
Needs to explain to me plzzz
Answer:
Its 15, just trust me on this one
Step-by-step explanation:
10–{12–[(−9)+(−1)]} answer ASAP please
Answer:
-12
Step-by-step explanation:
-9+(-1) is -10. 12-(-10) is 22. 10-22= -12
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A triangle has 2 angles that each measure 81°.
What kind of triangle is it?
A.
isosceles triangle
B.
equiangular triangle
C.
obtuse triangle
D.
right triangle
Answer:
Explanation: An isosceles triangle is a triangle in which two of the three sides are the same length, or two of the three angles are the same degree.
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
If 2 angles are congruent, then it is an isosceles triangle (ALWAYS)
This is the first year Janis is playing softball. She has been practicing her batting. On her last swing the bat made an arc with a radius of 48 inches and swept through 255° of rotation. Assuming the arc is circular, what is the distance the tip of the bat travels in inches in terms of pi? How many feet is this in terms of pi?
Using the relation between arc length and the radius, the arc length covered by the bat tip for a swing of 255 degrees with a 48-inch radius bat is (85/6)π inches or (85/72)π feet.
Explanation:The subject of the question is based in mathematics, specifically geometry. To solve the question, first, we have to know that the circumference (C) of a given circle is calculated as
2πr
, where 'r' is the radius. Since 255° is a portion of the total circumference (which is considered as 360°), we calculate the fraction of the total circumference covered by 255°, which is 255/360. The arc covered by Janis's bat swing is, therefore,
(255/360)*2πr
. Substituting 'r' with 48 inches, the arc length (As) comes to
(85/6)π inches
. To convert this to feet, divide the result by 12 (since there are 12 inches in one foot), which gives
(85/72)π feet
.
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Ted and Katie have served up a total of $94 Tata saved six dollars less than four times as much is Katie how much has Katie saved
Answer:
Katie saved $20.
Step-by-step explanation:
I assume that "served" is a typo for "saved". Also, I assume that Tata and Ted are the same person.
Let the amount Katie saved = k
Then, ted saved $6 less than 4 times k, or 4k - 6.
The total saved by both is k + 4k - 6.
The total saved by both is $94.
k + 4k - 6 = 94
5k - 6 = 94
5k = 100
k = 20
Answer: Katie saved $20.
Final answer:
To determine the amount Katie has saved, two equations were set up based on the given information. The equations were solved simultaneously to find that Katie has saved $20.
Explanation:
Let's denote the amount Katie has saved as K and the amount Tata has saved as T. According to the problem, Tata saved six dollars less than four times as much as Katie, which we can write as T = 4K - 6. Additionally, we know that together they have saved a total of $94, so we can express this as K + T = 94. Substituting the expression for T from the first equation into the second equation, we get K + (4K - 6) = 94. Simplifying this, we get 5K - 6 = 94. By adding 6 to both sides, we obtain 5K = 100, and dividing by 5, we find that K = 20. Therefore, Katie has saved $20.
-48 ÷ [-3 (2 - 4) ] = ?
Answer:
The answer is -8
Step-by-step explanation:
By the way, is that Lucy Heartfilia? :D
Sasha made cups of lemonade to sell at her stand. She sold 9 cups of lemonade in the first hour. For each hour after that, she sold five cups. She was outside for a total of 4 hours. How many cups of lemonade did she sell?
Answer:
24 cups
Step-by-step explanation:
1st hours = 9 cups
2nd hour = 5 cups
3rd hour = 5 cups
4th hour = 5 cups
9 + 5 + 5 + 5 = 24 cups
What is the volume of the composite figure? Leave the
answer in terms of .
Tot mm
5 mm
3 mm
Answer:
It is 33 on edge 21.
Step-by-step explanation:
trust me :)
Patricia buys a round dinner table the radius of the dinner table is 6 m what is the area of the table table
Answer:
18.8495559215 m
Step-by-step explanation:
It is 6 times pi.
Answer:
113.04
Step-by-step explanation:
". Which of the following sentences does not represent a function?
A. Notebooks are sold in a four pack for $20
and a five pack for $25.
B. Shaunette charges $20 for one hour of
babysitting and $40 for two hours.
C. Marcy drove 50 miles in one hour today
and 100 miles in two hours yesterday.
D. Timon chewed six gumballs in two hours
today and six gumballs in three hours
yesterday
To be a function, each input must correspond to exactly one output. In all cases except for Timon's gumballs, each distinct input yields a distinct output. Therefore, the sentence about Timon's gumballs does not represent a function.
Explanation:In mathematical terms, a function is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output. Let's go through these situations separately:
Notebooks are sold in a four pack for $20 and a five pack for $25. Here, the input, or the number of notebooks, determines the output, or price. No two outputs are the same for any given input. This is a function.Shaunette charges $20 for one hour of babysitting and $40 for two hours. The input (hours) determines the output (price). Similar to the first example, no two outputs are the same for any one input. This is a function.Marcy drove 50 miles in one hour today and 100 miles in two hours yesterday. The input (time) determines the output (distance traveled). There is a unique output for each input. This is a function.Timon chewed six gumballs in two hours today and six gumballs in three hours yesterday. This time, for different inputs (different hours), the output (number of gumballs chewed) is the same. This does not comply with the definition of a function because a function should have a unique output for each input. Therefore, this sentence does not represent a function.Learn more about Functions here:https://brainly.com/question/35114770
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Find the sum of the given polynomials. 3x ^2 + 2x - 5 and -4 + 7x ^2
Answer:
[tex] 10 {x}^{2} + 2x - 9[/tex]
Step-by-step explanation:
[tex](3 {x}^{2} + 2x - 5) + ( - 4 + 7 {x}^{2}) \\ = 3 {x}^{2} + 2x - 5+ 7 {x}^{2} - 4 \\ = 3 {x}^{2} + 7 {x}^{2} + 2x - 5- 4 \\ = 10 {x}^{2} + 2x - 9[/tex]
Which linear equation represents the data given in the table?
The linear equation represents the data given in the table is option D.
calculation:Here we used the elimination process. From the table of values, we can see that the y-intercept is -3 from the point (0,-3)Now y = mx+b where b= the y-interceptAnd option D represent the only equation where b = -3.Find out more information about the equation here: https://brainly.com/question/2263981?referrer=searchResults
what is the square root of 100
Answer:
the square root of 100 is +-10
Step-by-step explanation:
a square root is the number that when squared makes that number
10 squared =100
Answer:
Plus or minus 10
Step-by-step explanation:
10 times 10 is 100, also, -10 times -10 is 100
Describe the difference between an angle with a positive measure and an angle with a negative measure.
Answer:
negative is rotating counter clockwise and positive is straight
Step-by-step explanation:
positive 180 degresse rotation
Positive angles result from counterclockwise rotation, and negative angles result from clockwise rotation.
What are angles?In Plane Geometry, a figure which is formed by two rays or lines that shares a common endpoint is called an angle.
The difference between the positive and negative angles :-
Angles are sometimes classified based on whether their values are more than or less than 0° into positive and negative angles. The measure of a positive or a negative angle depends on the amount of rotation between the two sides forming the angle. The rotation is measured from the initial side to the terminal side of the angle.
What is a Positive Angle :-
An angle formed by an anti-clock wise or counterclockwise rotation from its initial side is called a positive angle.
12°, 33°, 90°, 180°, 360° are all example of positive angles.
What is a Negative Angle :-
An angle formed by a clockwise rotation from its initial side is called a negative angle.
-9°, -45°, -110°, -280°, -310° are all example of negative angles.
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1 gallon of water weighs 8 1/3 pounds
30 gallons of water weighs x pounds
30 gallons of water weighs 250 pounds.
To find the weight of 30 gallons of water, we can use the given conversion factor that 1 gallon of water weighs 8 1/3 pounds.
First, let's find the weight of 1 gallon of water in pounds:
1 gallon = 8 1/3 pounds
Now, we can calculate the weight of 30 gallons of water:
30 gallons = 30 x (8 1/3 pounds)
= 30 x (25/3 pounds)
= 250 pounds
Therefore, 30 gallons of water weighs 250 pounds.
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Juanita is booking a 4-night stay at a hotel. The rate is $79 per room plus tax.
If state tax is 6%, city tax is 2%, and municipal tax is 1%, what is her total
lodging cost?
Final answer:
To determine the total lodging cost for Juanita's 4-night stay, multiply the nightly rate by the number of nights to get the pre-tax cost, calculate the total tax rate and apply it to the pre-tax cost to find the tax amount, and then add this tax to the pre-tax cost for the total cost. The total lodging cost, including taxes, will be $344.44.
Explanation:
Juanita is trying to calculate the total cost of a 4-night stay at a hotel with a nightly rate and additional taxes. To find Juanita's total lodging cost, a multi-step calculation is required. First, calculate the cost before tax by multiplying the nightly rate by the number of nights. Then, calculate the total tax by adding the state, city, and municipal tax rates and applying this sum to the pre-tax cost to get the total tax amount. Finally, add the tax amount to the pre-tax cost to find the total cost of the stay.
The nightly rate is $79 and she is staying for 4 nights, so the initial cost (before tax) is calculated as follows:
79 x 4 = $316
To calculate the total tax, convert the percentages to decimals and sum them up as follows:
State tax (6%) = 0.06
City tax (2%) = 0.02
Municipal tax (1%) = 0.01
Total tax rate = 0.06 + 0.02 + 0.01 = 0.09
Multiply the total tax rate by the pre-tax cost to find the total tax amount:
0.09 x 316 = $28.44
Finally, add the tax amount to the pre-tax cost to get the total lodging cost:
316 + 28.44 = $344.44
The total cost for Juanita's 4-night stay at the hotel, including all taxes, is $344.44.
The radius of a circle is 620cm what is the diameter of this circle
Answer:
1240 cm
Step-by-step explanation:
Diameter = 2 * radius
The radius is 620, making the diameter 620 * 2 = 1240
HELP PLS 30) PTS
--------
Calculate the bases of the trapezoid.
The diagonal of the trapezoid divides the central section into parts, one of which makes up 62.5% of the other . Find the bases when the middle section is 26 cm.
The answer . The longer base of the trapeze is__ cm and shorter__ cm.
Answer:
32 ; 20
Step-by-step explanation:
Middle section: 26
Sum of parallel lengths: 2 × 26 = 52
Ratio of the sides:
100% : 62.5%
8 : 5
5/(8+5) × 52
20
8/(8+5) × 52
32
How many triangles can you construct with two 4-inch sides and an 80 degree angle?
Answer:
2
Step-by-step explanation:
The 80° angle can be between the two given sides, or opposite one of them. These are the only two possibilities.
What is 8+7times15 so what is it tell me now
A right triangular pyramid has a height of 10 inches and a base area of 41.57 square inches. What is the volume, in cubic inches, of the pyramid?
The volume of the rectangular pyramid with the given values of height and base area is 138.5 cubic inches.
What is a right triangular pyramid?A right triangular pyramid is simply a triangular pyramid which has an equilateral base, and whose top is directly above the base's centroid.
The volume of right triangular pyramid is expressed as;
V = 1/3 × b² × h
where b is the length of the base and h is the perpendicular height.
Given the data in the question;
Height of the pyramid h = 10in Base area A = 41.57in²First we find the dimension of the base length.
Since area square is A = b².
Hence;
41.57in² = b²
b = √41.57in²
b = 6.447in
Now, we substitute our values into the expression above.
V = 1/3 × b² × h
V = 1/3 × (6.447in)² × 10in
V = 1/3 × 41.563809in² × 10in
V = 138.5in³
Therefore, the volume of the rectangular pyramid with the given values of height and base area is 138.5 cubic inches.
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Identify the type of function.
y = (x-5)(x-2)
Which number is not in scientific notation?
Answer:
There are no answer choices
Step-by-step explanation:
I am sorry!
Answer:
What number?
Step-by-step explanation:
Bobby and his family went to the playground. The slide is 13
feet long. The end of the slide is 7 feet away from the stairs. The
stairs extend 2 feet higher than the end of the slide. How tall are
the stairs?
Answer:
it would be close to 12 ft im not 100% sure though the measurements are a little off
Step-by-step explanation:
hypotenuse is 13
then you have the adjacent = 7
13^2 = 169
7^2= 49
169-49=120
the square root of 121 is 11 wich is fairly close to 120(doesnt have one because its not exact)
there is two extra feet so 11 +2 is 13 but there was a little less then 11 so i had sid roughly around 12
brainliest, please???
The total height of the stairs can be found by adding the distance from the ground to the end of the slide (7 feet) and the extra height of the stairs (2 feet). This adds up to a total height of 9 feet for the stairs.
Explanation:The subject of the question is Mathematics, and it's suitable for a Middle School level. The problem can be solved using basic addition, and the concept of distance and height.
First, identify the length of the slide, which is 13 feet. Next, you're told that the end of the slide is 7 feet away from the stairs. This distance represents the height from the ground to the end of the slide. Lastly, you're told that the stairs extend 2 feet higher than the end of the slide.
Add these two distances together. So, the total height of the stairs is 7 feet (height to end of slide) plus 2 feet (additional height of stairs) equaling 9 feet.
So, the stairs are 9 feet tall.
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Solve and graph this inequality on a number line:
-3 (x + 4) = 15
Steps to solve:
-3(x + 4) = 15
~Distributive Property
(-3 * x) + (-3 * 4) = 15
~Simplify
-3x - 12 = 15
~Add 12 to both sides
-3x - 12 + 12 = 15 + 12
~Simplify
-3x = 27
~Divide -3 to both sides
-3x/-3 = 27/-3
~Simplify
x = -9
Best of Luck!
I know this seems like duhh but I honestly forgot
Answer:
In parasitic relationships, the parasite is a term for a parasitic organism - it leeches substance from its host. In this case, the host is the dog.
Tim install 50 square feet of his floor in 45 mins. At this rate how long does it take him to install 495 square feet. Is that 99.5 or 445.5?
Answer:
the answer is 445.5
Step-by-step explanation:
what I did was divide 50 by 495 and got 9.9 then since it took 45 minutes every 50 square feet of floor i multiplied 45 x 9.9 and got 445.5
Describe the transformations that maps triangle A to triangle A'.
A.translate 7 units to left and then reflect over the x-axis
B.translate 5 units to left and then reflect over the x-axis
C.translaté 7 units to right and then reflect over the x-axis
D.translate 5 units to right and then reflect over the x-axis
Answer:
c
Step-by-step explanation:
moving the figure over 7 units would put it directly over the a'
after that you can reflect the a over the x axis
The correct option is C. Translate [tex]7 \ units[/tex] to the right and then reflect over the x-axis.
To determine the transformations that map triangle [tex]\( A \)[/tex] to triangle [tex]\( A' \)[/tex]
1. Translation:
Observe the horizontal distance between the corresponding points of triangles [tex]\( A \)[/tex] and [tex]\( A' \)[/tex].
Triangle [tex]\( A \)[/tex] is initially centered around [tex]\( x = 2 \)[/tex]., while triangle [tex]\( A' \)[/tex] is centered around [tex]\( x = 2 \)[/tex]
The horizontal distance from [tex]\(-5\)[/tex] to [tex]\(2\)[/tex] is [tex]\(7\)[/tex] units to the right.
2. Reflection:
Check the vertical positions of triangles [tex]\( A \)[/tex] and [tex]\( A' \)[/tex].
Triangle [tex]\( A \)[/tex] is above the x-axis while triangle [tex]\( A' \)[/tex] is below the x-axis. This indicates a reflection over the x-axis.
Thus, the correct transformation sequence is to translate triangle [tex]\( A \) 7 units[/tex] to the right and then reflect it over the x-axis.
What is a surface area?
Answer:
D
Step-by-step explanation:
in order to find the surface area, you have to add all of the surface area of the figure
Juanita has saved 30% of the money that she needs to buy a new bicycle. If she has saved $42, how much money does the bicycle cost? The Bicycle costs?
Answer:
$140
Step-by-step explanation:
If $42 is the amount of 30% of the price of a bycicle, we can quickly find the total amount by dividing 42 by .3.
42/0.3 = 140
$140 is your final answer!
Hope this helps!