Answer:
b.) To estimate the mean number of classes that students take at his university, Samuel collects data from a randomly selected proportionate number of students from each grade level.
c.) David wants to estimate the mean grade point average of students at his school. He collects data by recording the grade point average of every 25th student on the list of students after a randomly selected first student.
d.) Helen wants to estimate the male to female ratio of the residents of her city. She collects data by recording the sex of every 50th resident after selecting a random starting point on a list of residents.
Why? Because a sample is only biased if some individuals of the population are more or less likely to be chosen than others.
The sample from choice B isn't biased because every student has the same opportunity of being selected. It's the same predicament with choice C; it's also non-biased because again, each student has a chance of being in it, there is no preference.
And finally, the sample from option D is non-biased, because every resident that is being selected has an equally fair chance of being selected at random.
Hope this helps ;)
Answer:
Step-by-step explanation:
To estimate the mean number of classes that students take at his university, Samuel collects data from a randomly selected proportionate number of students from each grade level.
David wants to estimate the mean grade point average of students at his school. He collects data by recording the grade point average of every 25th student on the list of students after a randomly selecting first student.
Helen wants to estimate the male to female ratio of the residents of her city. She collects data by recording the sex of every 50th resident after selecting a random starting point on a list of residents.
can anyone answer this question. A) How many scarves can be made from 7 1/2m of fabric, if each scarf requires 1 3/8m of fabric? B) will any fabric be left over? If so, how much? Will mark brainliest for the answers.
Answer:
A) 2
B) 13/16
A) If 1 3/8 = 1 scarf
7 1/2 = 7 1/2 ÷ 1 3/8
= 2.8125
so 7 1/2 can make 2 scarfs
B) remaining fabric is 0.8125
= 13/16
how much dollars is in 14 quarters and 5 nickels
Answer:
$4.25
Step-by-step explanation:
4 quarters is 1 dollar
1 nickel is 5 cent
14 divided by 4 = 3.5
3.5 + 5 times 5 = $4.25
Step-by-step explanation:
1 dollar = 4 quarters
1 dollar = 20 nickel
1 nickel = 0.2 quarter
5 nickel = 0.2 x 5 = 1 quarter
14+ 1 = 15 quarter
15 quarter = 3.75$
It’s 37 divided by 6
Answer:
[tex]6 \frac{1}{6} [/tex]
Step-by-step explanation:
[tex]37 \div 6 = 6 \: remainder \: 1 \\ = 6 \frac{1}{6} [/tex]
Reflect the quadrilateral across the line y=x
A= 0,-3
D= -4,-3
C= 0,4
B= 3,3
Step-by-step explanation:
,
5)
Below is a data table that shows the growth of a plant in a garden. Use the data table to create a graph
that shows the height of the plant for each day recorded. Make sure you label your x and y-axis with a
correct scale. Use a scatter plot to create your graph.
Day # (days)
Plant Height (cm)
0
0
1
0.2
2
0.4
3
0.6
Plant Height
(cm)
I
4
0.8
5
1.0
6
1.2
0
Day #
Answer:
is number one ka matalab hindi me janiye to the meeting ko join date puchhrahai hai ki tum mere ko bohot achhi lagi aur attitude to nahin hai ki tum mere ko bohot achhi lagi aur attitude to nahin hai ki tum mere ko bohot achhi lagi aur attitude to nahin hai ki tum mere ko bohot achhi lagi aur attitude to nahin hai ki tum mere ko bohot achhi lagi aur attitude to nahin hai ki tum mere ko bohot achhi lagi aur attitude to
I need to write an equation for One-fifth of a number x is 25
Step-by-step explanation:
that's it!! pls mark me as Branliest..
Write an equation of the line that passes through the points. Use the slope-intercept form (if possible). If not possible, explain why and use the general form. Use a graphing utility to graph the line (if possible).
Answer:
y = 7/8x -1/2 y = mx+bm = slopeSlope = 7/8Step-by-step explanation:
[tex](4,3)=(x_1,y_1)\\(-4,-4)=(x_2,y_2)\\\\\frac{y-y_1}{x-x_1} = \frac{y_2-y_1}{x_2-x_1}\\ \\\frac{y-3}{x-4}= \frac{-4-3}{-4-4}\\\\\frac{y-3}{x-4}=\frac{-7}{-8} \\-8(y-3) =-7(x-4)\\-8y +24=-7x +28\\-8y =-7x +28-24\\-8y = -7x +4\\Divde\:both\:sides\:of\:the\:equation\:by\: -8\\\\\frac{-8y}{-8} = \frac{-7x}{-8} +\frac{4}{-8}\\\\y = \frac{7}{8}x -\frac{1}{2}[/tex]
Work out the angles marked x in each diagram you must show your working
Answer:
this how I got the answer
Step-by-step explanation:
find the angle A ..B
it's a straight line so 180.
180_148=32
In angle C..it's a full turn.so 360
360_290=70
we just have to find one more angle...
it's a straight line ..so as we know 180
32+70=102
180_102=78
Which is the function represented by the table?
Answer:
the answer is f(x) = x + 5 ( the first option)
Step-by-step explanation:
Let f be a linear function such that f(1) = 5 and f(3) = 9. Find an equation for f(x).
Answer:
[tex]f(x)=2x+3[/tex]
Step-by-step explanation:
So we know that:
[tex]f(1)=5 \text{ and } f(3)=9[/tex]
In other words, we have 2 coordinates: (1,5) and (3,9).
With this, we can figure out the slope. Let (1,5) be x₁ and y₁ and let (3,9) be x₂ and y₂. The slope formula is:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
Substitute:
[tex]m=\frac{9-5}{3-1}\\m=4/2=2[/tex]
So, the slope is 2.
Now, use the point-slope form to figure out the y-intercept. The point-slope form is:
[tex]y-y_1=m(x-x_1)[/tex]
For consistency, let's continue to use (1,5) as x₁ and y₁. Now, we can use 2 as m. Thus:
[tex]y-(5)=2(x-1)[/tex]
Distribute:
[tex]y-5=2x-2[/tex]
Add 5 to both sides:
[tex]y=2x+3[/tex]
So:
[tex]f(x)=2x+3[/tex]
And that's our equation :)
ASAP!! NEED HELP WITH ONLY 21 AND 23 !!!
Emily is three years older than twice her sister Mary's age. The sum of their ages is less than 30. Let x represent Mary's age. Which inequality represents Mary's possible age?
Answer:
0 < x < 9
Step-by-step explanation:
Mary's age = x
Twice of Mary's age = 2x
Emily's age = (2x + 3) (we are told Emily is 3 years older than twice of Mary's age)
Given that the sum of their ages is > 30, we have the following expression:
[tex] (2x + 3) + x [/tex] > 30
Let's simply:
[tex] 2x + 3 + x [/tex] > 30
[tex] 3x + 3 [/tex] > 30
Subtract 3 from both sides
[tex] 3x + 3 - 3 [/tex] > [tex] 30 - 3 [/tex]
[tex] 3x [/tex] > [tex] 27 [/tex]
Divide both sides by 3
[tex] \frac{3x}{3} [/tex] > [tex] \frac{27}{3} [/tex]
[tex] x [/tex] > [tex] 9 [/tex]
Therefore, the inequality that represents Mary's possible age is: 0 < x < 9
How can undefinable terms be used to create precise mathematical definitions?
Answer:
This is done by stating descriptions of these terms.
Step-by-step explanation:
Undefinable terms are terms with no formal definitions. Formal definitions are obtained when specific words are used to define a term. In mathematics, specifically, Geometry words like line, point, and plane have no definite definition, So descriptions are used to identify them.
For example, in describing a point, we note that a point has no dimensions, it is usually denoted with a capital letter, and it indicates a position. Also in a coordinate plane, it is denoted with descriptions such as (u,v). Corresponding descriptions are given of other undefinable terms.
middle school work please help!!
Answer:
5.52 miles
Step-by-step explanation:
All you need to do in multiply 1.2 by 4.6 like this:
1.2 x 4.6 = 5.52 miles
I hope this helps
d. 6 &1
-= 1, a & y are
c. 3&4
of
c. -2/3 d. -3/5
en a 60 are.
-b IVb2
+ 4ac
2a
-b7b2 - 4ac
d.
2a
a + 1/a
c.-5
d. 5
ents a
b.
GEducat
is not the lear
of facts, but the train
Dato:
Page
:
34
(where a=27 and
1) Find the value of 33 + b
b f16
Antonio finished the race in 28 minutes and 11.00 seconds. Julio finished 0.08 second faster than Antonio. Pete finished 0.1 second faster than Julio. How long did it take Pete to finish the race?
Answer:
It took Peter 28 minutes and 10.82 seconds to finish the race.
Step-by-step explanation:
We have that:
[tex]t_{A}[/tex]: Antonio = 28 min + 11.00 s (1)
[tex]t_{J}[/tex]: Julio = A - 0.08 s (2)
[tex]t_{P}[/tex]: Pete = J - 0.1 s (3)
Then, the time at which Pete finished the race is:
[tex] t_{P} = t_{J} - 0.1 [/tex] (4)
By entering equations (1), (2), (3) into (4) we have:
[tex] t_{P} = (t_{A} - 0.08) - 0.1 [/tex]
[tex] t_{P} = 28 min + 11.00 s - 0.18 s = 28 min + 10.82 s [/tex]
Therefore, it took Peter 28 minutes and 10.82 seconds to finish the race.
I hope it helps you!
6 divide by 1/3???????
Answer:
20
Step-by-step explanation:
1/3 = .3
6/.3 = 20
Answer:
18
Step-by-step explanation:
6 ÷ 1/3
changing the ÷ sign into × sign and taking reciprocal of the second term
6 × 3/1
putting 1 as the denominator of 6
6/1 × 3/1
now multiplying both terms
18/1
18
ANSWER FAST PLZ .............
Answer:
a) T
B) WT and TZ
C) ZTU
D) YTX
E) YT and WT
F) Angle 5 - right angle
G) obtuse angle (>90)
H) acute angle (<90)
I) obtuse angle, unless it means the other side which would be a reflex angle instead (>180)
Hope this helped!
Roger is x centimeters tall and Olivia is y centimeters tall. Their oldest sister, Isabella, is 25 centimeters shorter than the double of the sum of Roger and Olivia's height. Write an expression for Isabella's height
Answer:
[2(x+y)-25]cmStep-by-step explanation:
Let the height of their oldest sister isabella be z centimeters. Roger is x centimeters tall and Olivia is y centimeters tall.
If their oldest sister, Isabella, is 25 centimeters shorter than the double of the sum of Roger and Olivia's height, this can be expressed as shown;
First let us get the sum of Roger and Olivia's height;
The sum of Roger and Olivia's height = (x+y)cm
The double of the sum of their ages = 2* (x+y)cm = 2(x+y)cm
Now if Isabella, is 25 centimeters shorter than the double of the sum of their ages, the expression will be [2(x+y)-25]
Since the height of isabella is z, the expression that model isabella's height will be expressed as z =[2(x+y)-25]cm
PLEASE HELP ME WITH THIS QUESTION!
Answer:
91
Step-by-step explanation:
the angle adjacent to x is corrsponding with angle 89 meaning it is the same:
180 - 89 = 91
Isabel needs to cut a square piece of wood with the area of 70 in.² approximate the size of the square and round to the nearest 10th of an inch
Answer: 8.4 inch
Step-by-step explanation:
To find the size of the square, just find the square root of 70. Because the area of a square is the side length squared
[tex]\sqrt{70}[/tex] = 8.3666 rounded to the nearest 10th is 8.4 inch
Whats the answer to this?
Answer:
153 cm^2
Step-by-step explanation:
The area is given by
A = b*h
= 17*9
=153 cm^2
Answer:
Step-by-step explanation:
A=(b1+b2/2)h
The formula is area= base 1 plus base 2 over 2 times the height.
The two bases are 17 cm. Let's add that in our formula.
A=(17+17/2)h
17+17= 34. Since 34 is over 2 in the parentheses, let's simplify that first.
A=(34/2)h
A=(17)h, because 34 divided by 2 is 17
The height, h, is 9 cm. Let's subsitute that into h.
A=(17)9
17 times 9 equals 153, so the area is 153² cm. :)
I am a 4 digit number my one digit is 2 my tens digit is 4 times greater then my ones my hundreds and thousands digits are both 3 greater then my ones what number am i
Answer:
6682
Step-by-step explanation:
So we have a 4 digit number and we need to find all the digits of it.
First, we are told that the one digit is 2. So the number is xxx2
Now, we know that the tens digit is 4 times greater than the ones, thus, the tens digits is 4 times 2, this is 4(2) = 8. Thus, the tens digit is 8 and the number is xx82.
Finally we know that the hundreds and thousands are both 3 times greater than the ones, so the digits are 3(2) = 6. Thus the hundreds and thousands are 6 and the final number is 6682.
choose the correct statement
A. w=x+y
B. w=x+z
C. w=y+z
D. w=x+y+z
Answer: A. w = x+y
Step-by-step explanation:
w is an exterior angle so the two remote angles x and y has to equal it.
Answer:
w = x+y
Step-by-step explanation:
The exterior angle of the triangle is equal to the sum of the opposite interior angles of the triangle
w = x+y
Mak deposited $493.12 in a savings account that earns 3.2% simple interest. What is Mak's account balance after 13 years?
Answer:
$698.26
Step-by-step explanation:
Deposit = $493.12Interest rate = 3.2% simpleTime = 13 yearsBalance after 13 years:
493.12*(1 + 3.2*13/100) = 698.26Death Valley headquarters in California is 190 feet below sea level. Badwater, America's lowest point, is 92 feet lower than Death Valley headquarters. How far below sea level is Badwater? Badwater is feet below sea level.
Answer: Badwater is 282 feet below the sea level.
Step-by-step explanation:
Given: Death Valley headquarters in California is 190 feet below sea level. Badwater, America's lowest point, is 92 feet lower than Death Valley headquarters.
To find the depth of Badwater we need to add depth of Death Valley headquarters from sea level to the depth of Badwater from Death valley headquarters.
i.e. The Depth of Badwater from sea-level = 190 feet +92 feet
= 282 feet
Hence, Badwater is 282 feet below the sea level.
Answer:
282
Step-by-step explanation:
190+(92)=282
Thank you! :)
Complete this expression using the distributive property: 5(4 + 8) = 5 MINUTES PLEASEE I WILL GIVE YOU SOOO MUCH POINTSS!!!
Answer:
see below
Step-by-step explanation:
5(4 + 8) =
Distribute
5*4 + 5*8
20 + 40
60
Answer:
60
Step-by-step explanation:
We want to complete the expression using the distributive property. The expression is:
5(4+8)
Distribute first. Multiply each number inside the parentheses by the number outside the parentheses, which is 5.
(5*4)+(5*8)
Multiply 5 and 4.
20+(5*8)
Multiply 5 and 8.
20+40
Add 20 and 40.
60
The expression 5(4+8) is equal to 60.
Gomez has 30 cans of regular soda and 18 cans of diet soda. He wants to create some identical refreshment tables that will operate during the football game. He also doesn’t want to have any sodas left over. What is the greatest number of refreshment tables that Gomez can stock?
Answer: 6
Step-by-step explanation:
Given: Gomez has 30 cans of regular soda and 18 cans of diet soda.
He wants to create some identical refreshment tables that will operate during the football game and doesn't want any sodas left over.
Then, the greatest number of refreshment tables that Gomez can stock = GCD (30,18).
Since, 30= 2 x 5 x x 3
18= 2 x 3 x 3
GCD (30,18) = 2 x 3 = 6
Hence, the greatest number of refreshment tables that Gomez can stock is 6.
To pass an Examination consisting of four papers, candidates MUST score a mean mark of 40% or above and NOT less than 33% in each paper. The table below shows the marks for 3 students. Using the tables, which students passed the examination? Give reason(s).
Answer:
Josephine
Step-by-step explanation:
2 criteria was given to pass an exam:
1. At least, a mean mark of 40% must be achieved in the exam consisting of 4 papers
2. Score at least, 33% in each paper.
From the table given, and considering these two criteria, James definitely didn't pass the examination. He scored below 33% in one of the 4 papers. James scored 30% in Maths
Calculated the mean score for John and Josephine to determine if they meet the first criteria of having at least a mean score of 40%.
Mean score of John = (35 + 36 + 42 + 44) ÷ 4 = 39.25%
Mean score for Josephine = (60 + 55 + 38 + 75) ÷ 4 = 57%
Josephine passed the examination because she had a mean score of 57%, and also scored 33% and above in each test.
Apply the Distributive Property first to solve the equation below. What operation will you need to use last? If instead, you divide first to solve the equation what operation would you need to use last? 24(d/4 -5)=156
Step-by-step explanation:
The distributive property is as follows :
[tex]a(b+c)=ab+ac[/tex] ....(1)
We need to solve [tex]24(\dfrac{d}{4}-5)=156[/tex] using distributive property
Applying property (1) on the LHS of given equation
Taking a = 24, b = d/4 and c = -5
So,
[tex]24(\dfrac{d}{4}+(-5))=156\\\\24\times \dfrac{d}{4}+24\times (-5)=156\\\\6d-120=156\\\\6d=156+120\\\\6d=276\\\\d=\dfrac{276}{6}\\\\d=46[/tex]
So, we get the value of d as 6 using distributive property.