Sure, post the questions.
Kim asked the first 50 kids to school in the morning how they feel about waking up early. she uses their response to predict the responses for the entire school. was her survey random?
Kim's method of sampling the students in the given scenario is said to; It is not a random survey.
What is a random sample?
Random sampling is defined as a sampling technique whereby each sample has an equal probability of being chosen. This means that a sample chosen randomly is meant to be an unbiased representation of the total population.
In this question, we are told that Kim asked the first 50 kids to school in the morning about a question and used their responses to arrive at a conclusion.
Now, Kim's method is not random because it is biased as only those who came earliest were asked.
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The following table shows the number of internet users in 201220122012 for the highest using countries. country china united states india japan brazil number of internet users (in millions) 568568568 254254254 152152152 101101101 100100100 find the median number of internet users. million internet users
Step-by-step explanation:
total no of items (n)= 5
median (m) = (n+1)/2 th item
= (5+1)/2 th item
= 6/2 th item
= 3rd item
= 152152152
It is known that a certain function is an inverse proportion. find the formula for this
function if it is known that the function is equal to 12 when the independent variable
is equal to 2.
er:
if the independent variable is x, dependent variable is y, then y =
Answer:
y=24/x
Step-by-step explanation:
An inverse proportion with a positive input and output always has a "fraction format"
12=24/2
12=12
y=24/1
y=24
The y-value for x=1 was higher than the y-value for x=2, that proves that it's inverse.
What two numbers multiply to -17 but add to -16?
Answer:
-33
Step-by-step explanation:
-17and den u add &16 together soon u have to additional into get -33
a lawn sprinkler waters a lawn in a circle as shown
Part A
I'm assuming you want the area of a circle with radius 17 yards.
We'll use the formula below
A = pi*r^2
A = (22/7)*17^2
A = (22*17^2)/7
A = 6358/7
A = 908 2/7
The sprinkler covers an area of about 908 2/7 square yards.
You'll type 908 in the left-most box
Then for the other two boxes, you'll have 2 up top and 7 down below to represent the fraction 2/7
The number 908 2/7 is a mixed number.
=======================================================
Part B
You mentioned that the radius reduces to 11 yards here. We'll use the same formula as above and pi = 22/7 approximately
A = pi*r^2
A = (22/7)*11^2
A = (22*11^2)/7
A = 2662/7
A = 380 2/7
The sprinklers can water an area of about 380 2/7 square yards.
This value is also a mixed number
380 is the value in the left most box (it's the whole part)
The other two boxes are filled out the same exact way as the previous part above.
in the figure below lines p and q are parallel. what do you notice?
Answer:
Corresponding
Step-by-step explanation:
So, we know that 1&2, 3&4, 5&6, and 7&8 all equal 180 degrees in their pairs. 7&3 are corresponding angles that are less than 90 degrees on their own. We don't know the degrees of each angle, so we can't say their exact angle.
(I know I didn't give the second answer, if you elaborate, maybe I can understand what it's asking better)
Hope this helped!
Answer:
-> Corresponding
-> Are equal
Explanation:
First, we will find where angles 3 and 7 are at. See attached. Since they are in corresponding places on both lines, these angles are corresponding angles.
We know that corresponding angles have the same measurement, so their measures will be equal, or in other words, congruent.
how do you do 7.8 plus 917.62
The value of the addition of the numbers 7.8+917.62 will be 925.42.
What is addition?The method of increasing the number is called the addition. or the sum of the two numbers is termed as the addition.
The addition of the numbers will be done as:-
917.62
+7.80
925.42
First, arrange the number one to another then add from the unit places you will get your answer.
So the addition of the numbers will be 925.42
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emergencyyy
Write the given expression in the form f(x)= a(x– h)? +k. Identify the vertex.
f(x) = 2x² - 16x-5
Answer:
vertex = (4, - 37 )
Step-by-step explanation:
the equation of a parabola in vertex form is
f(x) = a(x - h)² + k
where (h, k ) are the coordinates of the vertex and a is a multiplier
f(x) = 2x² - 16x - 5 ← factor 2 out of the first 2 terms
= 2(x² - 8x) - 5
using the method of completing the square
add/subtract ( half the coefficient of the x- term )² to x² - 8x
f(x) = 2(x² + 2(- 4)x + 16 - 16) - 5
= 2(x - 4)² - 32 - 5
= 2(x - 4)² - 37 ← in vertex form
with vertex = (4, - 37 )
How many helmets must the company make and sell to break even? helmets
The sale the company must make and sell to break even is;
B=600
How many helmets must the company make and sell to break even?Generally, the equation for the break even is mathematically given as
In conclusion
B=y vertex/price of each
Therefore
B=15600/26
B=600
In conclusion, the company's break even is
B=600
CQ
A company plans to sell bicycle helmets for $26 each. The company's business manager estimates that the cost, y, of making x helmets is a quadratic function with a y-intercept of 8,400 and a vertex of (500, 15,900). How many helmets must the company make and sell to break even?
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Answer:
600
Step-by-step explanation:
Nathaniel bought headphones online for $22. He used a coupon code to get a 40% discount. The website also applied a 10% processing fee to the price after the discount. How much was the discount, in dollars and cents?
Answer:
8.80 if it's the 40°/.
2.20 if it's the 10°/. processing fee
13.20 for how much he paid
#11 can someone help with this and also explain how they found the answer so ik how to do it
Answer:
24 units
Step-by-step explanation:
I really don't understand this, except for the fact that i found a workbook that has an answer with no work
hope this helps?:)
Select the dot plot with the least variability.
The dot plot with the least variability will be C.
How does the dot plot work?Suppose we're measuring something whose values are numeric. For each value of that thing we observe, we plot a dot above that value in the number line. Thus, the total number of dots in the dot plot tells us the total number of observations of the values of that thing we did.
Thus, suppose if we observed the value 'x', then we will make a dot above 'x'. If there is already a dot over 'x', then we will make a new dot over that dot.
The dot plot with the least variability will be C.
The graph is given below.
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PLEASE HELP WILL GIVE BRAINLEST!
Answer: The graph with green line is the graph showing a 1 radian angle in a standard position.
Step-by-step explanation:
Hope it helps you:)))))))
Have a good day
In a sale, the normal price of a bicycle is reduced by 35%.
The sale price of the bicycle is £585
Work out the normal price of the bicycle.
I really don't understand Adding and Subtracting Fractions with unlike Denominators?
5/8 - 2/32 =
Answer:
answer is 9/16 (9 over 16) Decimal form 0.5625
Step-by-step explanation:
explain how to correctly find the missing side.
Will Mark Brainist If Correct!
Let's check Pythagorean theorem
A²+B²=C²A is perpendicular
B is base
C is Hypotenuse
A²+4²=13²A²+16=169A²=153A=3√17Answer:
[tex]3 \sqrt{17}[/tex]
Step-by-step explanation:
The given triangle is a right triangle. Therefore, we can use Pythagoras Theorem to find the measure of the third side.
Pythagoras Theorem
[tex]a^2+b^2=c^2[/tex]
where:
a and b are the legs of the right trianglec is the hypotenuse (longest side) of the right triangleFrom inspection of the given triangle:
a = 4c = 13To calculate the measure of the third side "b", substitute the given values into the formula and solve for b:
[tex]\begin{aligned}a^2+b^2 & = c^2\\\implies 4^2+b^2 & = 13^2\\16+b^2 & = 169\\16+b^2-16 & = 169-16 \\b^2 & = 153\\\sqrt{b^2} & =\sqrt{153}\\b & = \sqrt{9 \cdot 17}\\b & = \sqrt{9}\sqrt{17}\\b & = 3\sqrt{17}\end{aligned}[/tex]
Therefore, the measure of the third side of the given right triangle in simplest radical form is [tex]3 \sqrt{17}[/tex].
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A child grew 3 1/4 inches one year and 4 3/4 inches the next year. How many inches did the child grow over the two years?
Answer:
8 inches.
Step-by-step explanation:
3 1/4 + 4 3/4
= 3 + 4 + 1/4 + 3/4
= 7 + 4/4
= 7 + 1
= 8 inches.
Answer:
The child grew 8 inches
Step-by-step explanation:
Step 1: Convert to improper fractions
[tex]3\frac{1}{4}[/tex]
[tex]\frac{1+(3*4)}{4}[/tex]
[tex]\frac{1+12}{4}[/tex]
[tex]\frac{13}{4}[/tex]
[tex]4\frac{3}{4}[/tex]
[tex]\frac{3+(4*4)}{4}[/tex]
[tex]\frac{3+16}{4}[/tex]
[tex]\frac{19}{4}[/tex]
Step 2: Combine the fractions
[tex]\frac{13}{4}+\frac{19}{4}[/tex]
[tex]\frac{13+19}{4}[/tex]
[tex]\frac{32}{4}[/tex]
[tex]8[/tex]
Answer: The child grew 8 inches
Angle C is inscribed in circle O. AB start overline, A, B, end overline is a diameter of circle O. What is the measure of \angle B∠Bangle, B?
The measure of ∠angle B when Angle C is inscribed in circle O and AB is a diameter of circle O, is 19 degrees.
What is triangle angle sum theorem?According to the triangle angle sum theorem, the sum of all the angle(interior) of a triangle is equal to the 180 degrees.
In the image attached below:
Angle C is inscribed in circle O. AB is a diameter of circle O.The measure of the angle A is,
[tex]m\angle A=71^o[/tex]
The measure of the angle C in a semicircle is,
[tex]m\angle C=90^o[/tex]
The sum of all the angle(interior) of a triangle is equal to the 180 degrees. Thus,
[tex]\angle A+\angle B+\angle C=180\\90+\angle B+71=180\\\angle B=180-90-71\\\angle B=19^o[/tex]
Thus, the measure of ∠angle B when Angle C is inscribed in circle O and AB is a diameter of circle O, is 19 degrees.
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Need some help! Please be specific.
Write a system of equations to represent the following word problem:
ASB sold 340 raffle tickets. Advanced tickets cost $2 each and same-day tickets cost $3 each. If a total of $810 was collected, how many of each type of ticket was sold?
Answer: 210 advanced tickets were sold. 130 same day tickets were sold.
Step-by-step explanation:
x= advanced tickets y=same day tickets
2x+3y=810 this equation represents the money
x+y=340 this equation represents the total number of tickets
x+y=340
-x -x
y=-340-x 2x+3(340-x)=810 210+y=340
2x+1020-3x=810 -210 -210
-x+1020=810 y=130
-1020 -1020
-x=-210
-1 -1
x=210
It takes Greg and Nikki a total of 40 minutes to paint a room if they work together. If Greg works alone, he takes 18 minutes longer to paint he room than Nikki takes if she works alone. When x represents the number of minutes it takes Nikki to paint the room working alone, the situation is represented by this equation: Which value is a solution of the rational equation that must be discarded because of the context
Using the together rate, it is found that the value that must be discarded is given by x = -9.
What is the together rate?It is the sum of each separate rate.
In this problem, the rates are given as follows:
Together: [tex]\frac{1}{40}[/tex].Nikki's: [tex]\frac{1}{x}[/tex].Greg's: [tex]\frac{1}{x + 18}[/tex].Hence:
[tex]\frac{1}{x} + \frac{1}{x + 18} = \frac{1}{40}[/tex]
[tex]\frac{x + 18 + x}{x(x + 18)} = \frac{1}{40}[/tex]
[tex]x^2 + 18x = 80x + 720[/tex]
[tex]x^2 - 72x - 720 = 0[/tex]
Then, we have a quadratic function, with coefficients a = 1, b = -72, c = -720, so:
[tex]\Delta = (-72)^2 - 4(1)(-720) = 8064[/tex]
[tex]x_1 = \frac{72 + \sqrt{8064}}{2} = 80.9[/tex]
[tex]x_2 = \frac{72 - \sqrt{8064}}{2} = -9[/tex]
They cannot have a negative rate, hence the value that must be discarded is given by x = -9.
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Answer:
X = -10
Step-by-step explanation:
PLATO
14. Which of the following is the perimeter of the right triangle shown below?
(1) 63 cm
(2) 64 cm
(3) 70 cm
(4) 74 cm
Answer:
3
Step-by-step explanation:
Using Pythagoras formula
h^2 = (root under) p^2 +b^2
or, h^2= 20^2 + 21^2
or, h^2= 400+441
or, h^2= 841
or, h= (root under) 841
Therefore h= 29
Now,
Perimeter of a triangle= a+b+c
= 20+21+29
=70
Given g(x) = x2-8x-20, which statement is true?
A. The zeros are -10 and 2, because the factors of g are (x+10) and (x-2)
B. The zeros are 10 and 2, because the factors of g are (x-10) and (x-2)
C. The zeros are 10 and -2, because the factors of g are (x-10) and (x+2)
D. The zeros are -10 and -2, because the factors of g are (x+10) and (x+2)
Answer:C
Step-by-step explanation:
The statement which is true is C. The zeros are 10 and -2, because the factors of g are (x-10) and (x+2).
What are Quadratic Functions?Quadratic functions are polynomial functions consisting of variables and exponents and the degree of the variable is 2.
The general form of a quadratic function is f(x) = ax² + b x + c.
Given is a function,
g(x) = x² - 8x - 20
We have to factorize the expression in order to find the zeroes.
Using factorization method, we can say that, the given function can be factorized (x + p) (x + q) as there exists two numbers p and q such that pq = -20 and p + q = -8
Two such numbers are -10 and 2.
So,
g(x) = x² - 8x - 20
g(x) = (x - 10) (x + 2)
So the zeroes are x = 10 and x = -2.
Hence the zeroes are 10 and -2.
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Let's find 3/4+1/10
First write the addition with a common denominator.
Then add. 3/4+1/10=?/?+?/?=?/?
Answer:
[tex]\frac{34}{40}[/tex]
Step-by-step explanation:
[tex]\frac{3}{4}+\frac{1}{10}[/tex]=[tex]\frac{30}{40}+\frac{4}{40}[/tex]=[tex]\frac{34}{40}[/tex]Which graph has a slope of 1/3?
Answer: the one on the bottom left
Step-by-step explanation:
Lorenzo increases all the prices on his restaurant menu by 8%
After the increase, the price of lasagne is £9.45
Work out the price of lasagne before the increase.
Step-by-step explanation:
to add 8% the simplest operation is to multiply the basic amount by 1.08.
so,
£9.45 = original price × 1.08
original price = £9.45/1.08 = £8.75
the price before the increase was £8.75.
demi had $170 in her bank account at the beginning of the month and $125 at the end of the month.
Each time she eats lunch in the cafeteria, $5 is deducted from her account.
How many times, x, did Demi eat lunch in the cafeteria this month? (No other deductions or deposits were made
Which of the following has the same value as the expression?
(-3+5)+2
Answer:
Answer(s):
1x4
2+2
2x2
Step-by-step explanation:
Hope this helps!
Jacob opens a savings account for a vacation with $200.50. Jacob wants to have at least $856.90 in the account in 4 weeks. What is the minimum amount Jacob should save per week to meet his goal? Enter your answer in the box.
Answer:
x = 164.10
Step-by-step explanation:
translated question says :
200.50 + 4x = 856.90
4x=656.40
x = 164.10
the product of the square of a number and the cube of the same number is equal to 243. find the number
Answer:
x=3
Step-by-step explanation:
X^2*x^3 → x^5
x^5 = 243 means x = 3
Answer:
The number is 3.
Step-by-step explanation:
Let "The square of the number" be x^2.
Let "the cube of the same number" be x^3.
"product" means multiplication.
x^2 • x^3 = 243
Multiply. To multiply, add the exponents.
x^5 = 243
Take the 5th root of both sides. You can do this on many scientific calculators with a x^y button. Or raise 243^ (1/5)
1/5 power is the same as 5th root.
You might do it in your head by thinking "what number to the 5th power is 243"
x = 3
Check 3^5 = 243
also
3^2 • 3^3 = 43
9 • 27 = 243
243 = 243 check
The area of a rectangle is 49d + 91
The length is an integer higher than 1, but is a known number.
Find the width of the rectangle.
Assuming that L and d are known numbers, we can write.
[tex]W = \frac{49d + 91}{L}[/tex]
How to get the width of the rectangle?
Remember that for a rectangle of width W and length L, the area is given by:
A = L*W
In this case, the area is 49d + 91, and the length is a known number, so we know the value of L.
Then we can write:
A = L*W = 49d + 91
To get the value of W, we need to isolate it on one side of the equation.
We can do that by dividing both sides by L.
[tex]W = \frac{49d + 91}{L}[/tex]
We assume that d and L are known, so with the above rational expression, we have W totally determined.
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