Answer:
The answer is below
Step-by-step explanation:
How much sleep do high school students get on a typical school night? An interested student designed a survey to find out. To make data collection easier, the student surveyed the first 100
students to arrive at school on a particular morning. These students reported an average of 7.2 hours of sleep on the previous night.
(a) What type of sample did the student obtain?
(b) Explain why this sampling method is biased. Is 7.2 hours probably higher or lower than the true average amount of sleep last night for all students at the school? Why?
Solution:
a) A voluntary response sample is a sample made up of volunteers. It samples more people who have strong opinions and sample people who have less opinion on the survey. It is biased.
Convenience sample is a type of sampling where the group of people are conveniently selected from a population. It is biased.
Since the first 30 students to arrive at school on a particular morning was used, this is convenience sampling since only the first 30 was conveniently selected.
b) This sampling method is biased because the first 30 students are those who would have woken up earlier while those who woke up late would not be sampled.
This means that the 7.2 hours is lower than the true average amount of sleep last night for all students at the school
Edward deposited $10,000 into a savings account 2 years ago. The simple interest rate is 2%. How much money did Edward earn in interest?
Step-by-step explanation:
Simple interest = PRT/100
S I = $10000 x 2 x 2
_____________
100
SI = $400
Answer:
$ 10,400
Step-by-step explanation:
Interest = P( 1 + rt)
10000 { 1 + ( 0.02 x 2 )
= 10000 * 1.04
= 10, 400
Raul Buys a fancy new TV on sale for $600 the original price of the TV was $899 what is the percent savings
Answer:
33.26% savings.
How many solutions does the equation have? -2(6x-4)=8-12x.
A. one solution
B. no solution
C. an inifinite number of solutions
D. impossible to determine
please hurry i only have 1 hour
Answer:
C.) 4 sqrt2
Step-by-step explanation:
ON=MN
therefore you can use pythagereum theorum here in a right triangle
as the hypotnuese is 8 you know that ON and MN is equal to the sqrt of 32 each. As A^2+ B^2=C^2
C=8 so C^2= 64 therefore,
A^2+ B^2=64 therefore,
A^2= 32 and B^2=32
you take the sqrt of 32 you get 4sqrt2
There are 12 big fish for ever 16 small fish. That means that there are____ big fish for every 4 small fish. How many?
Answer:
3 big fish for every 4 small fish
Step-by-step explanation:
Hope this helps and Happy Holidays!
Please answer helpppp !!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!
Answer:
Step-by-step explanation:
Remember that TR is 1/3 the length of MR
MR = 54
TR = 1/3 *MR
TR = 1/3 * 54
TR = 18
2=400 solve this equation.
Answer: 200
Work: If the equation is 2x = 400, you just divide 2 on both sides, meaning the answer is x = 200
7. Here is a polygon:
00
А A
a. Draw the dilation of ABCD using center A and scale factor Label the dilation
EFGH
b. Draw the dilation of ABCD with center D and scale factor , Label the dilation
IJKL
C. Show that EFGH and I JKL are similar
plz answer quick i need it now whoever has the Correct answers i will give a brainliest
Answer:
21
Step-by-step explanation:
The expression c-0.25c can be used to find the cost of an item on sale for 25% off.Which expression below is equivalent to c-0.25c?
A)0.25c
B)0.75c
C)1.25c
D)0.75
Answer:
B) 0.75c
1c-0.25=0.76c
The sequence 200, 100, 50, 25, ... has a common ratio of
Answer:
200/2 = 100
100/2 = 50
50/2 = 25
Everything is being divided by two
Answer:
the correct answer is 1/2
Step-by-step explanation:
What is the solution to the following proportion?
18/x = 3/2
Answer:
cross multiply to get 12
Step-by-step explanation:
Answer:
X=12
Step-by-step explanation:
18 x 2 is 36 divided by 3 is 12
you can simplify 18/12 by 6 to get 3/2
In Erica's math class, students were polled to find out what kind of music they enjoyed. Of the 25 students surveyed, 1/5 said they liked hip-hop, 16% chose country, and the rest chose pop as their favorite type of music. How many students chose pop music?
Help me with this please!!
Answer:
DE ≅ XY and XY ≅ YZ, then DE ≅ YZ
Thus, this statement is illustrated or validated by the 'Transitive Property of Segment Congruence'.
Step-by-step explanation:
We know that if two segments are congruent to the third segment, then they will be congruent to each other. This is called Transitive Property of Segment Congruence.
For example, Let suppose
segment LM = 30 unitssegment AB = 30 units segment BC = 30 unitsLM ≅ AB and AB ≅ BC, then LM ≅ BC
30 ≅ 30 and 30 ≅ 30, then 30 ≅ 30
Thus, this validates the 'Transitive Property of Segment Congruence'.
Now Given
DE ≅ XY and XY ≅ YZ, then DE ≅ YZ
Thus, according to the above discussion, this statement is illustrated or validated by the 'Transitive Property of Segment Congruence'.
a student studying public policy created a model for the population of Detroit which decreased 2.09% over a year in 2010 there was 730000 residents assuming this trend continues each year, write a function for p, the population t years after 2010
Answer:
KF
Step-by-step explanation:
someone please do this it’s due tomorrow!
Answer:
is this the whole question? is there a second part to it?
Solve. 45 + (-5) - 4 + 7
A: 45
B: 0
C: -34
D: 43
Answer:
D. 43
Step-by-step explanation:
45 + (-5) = 40
40 - 4 = 36
36 + 7 = 43
Star is buying mixed nuts by the pound. For every 8 pounds of mixed nuts she buys, she pays 20 dollars. How much does 1 pound of mixed nuts cost?
Answer:
2.5 bucks:)
Step-by-step explanation:
I need the answer to this
Answer
5/3-i
Step-by-step explanation:
Abag of peanuts is 5 times as heavy as a bag of sunflower seeds. The bag of peanuts
also weights 920 grams more than the bag of sunflower seeds. What is the total weight
in grams for the bag of peanuts and the bag of sunflower seeds?
Answer:
5s=p
s+920=p
5s=s+920
*subtract s from both sides*
4s=920
*divide 4 from both sides*
s=230
230*5=1150
The bag of sunflower seeds weighs 230 grams and the bag of peanuts weighs 1150 grams.
9514 1404 393
Answer:
1380 grams
Step-by-step explanation:
The ratio of weights is ...
peanuts : sunflower seeds = 5 : 1
Then the difference in weights is ...
5 - 1 = 4 . . . . ratio units
The sum of weights is ...
5 + 1 = 6 . . . . ratio units
That is the sum of the weights related to the difference of weights is ...
sum : difference = 6 : 4 = 3 : 2
So, the total weight of the two bags is 3/2 times the difference in their weights:
total weight = (3/2)(920 grams) = 1380 grams
WILL MARK BRAINLIEST!!!! BRAINLIEST!
Write 206 in base 7
Answer:
413
Step-by-step explanation:
A chef is filling one sink with water, while emptying another. The first sink is empty and is being filled at a rate of 4 gallons per minuet. The second sink is full and is being drained at a rate of 2 gallons per minute. If both sinks hold 24 gallons of water, how many minutes will it take for the two sinks to have the same amount of water?
please find the value of x :)
Answer:
x = 16
Step-by-step explanation:
90 = x+8+66
x = 90-74
x = 16
Answer:
16
Step-by-step explanation:
:D
which table of values can be defined by the function y = 4x - 2
Answer:
x y
-4 -18
-2 -10
0 -2
2 6
4 14
Step-by-step explanation:
Solve the following problems. Remember that all reasoning must be explained, and all steps of math work must be shown!
Topic: Perpendicular to Chord Property
Answer to Question 1:
<OGE (also m˚) = 19˚
Step-by-step explanation:
We know that all the angles in a triangle add up to 180˚.
Given:
<EGO = 71˚
<OEG = 90˚ (the angle forms a right angle because line EG is perpendicular to point O)
To Solve:
⇒ Since we know two angles, we should know the third; and they all add up to 180˚. This can be written as:
71˚ + 90˚ + <OGE = 180˚
⇒ Solve for <OGE by simplifying:
161˚ + <OGE = 180˚
⇒ Subtract 161˚ from both sides to get:
161˚ − 161˚ + <OGE = 180˚ − 161˚
⇒ Isolate <OGE:
<OGE = 19˚
Answer: <OGE (also m˚) = 19˚
Answer:
<OAC (also x˚) = 50˚
<OCB (also y˚) = 90˚
Step-by-step explanation:
–How to solve for <OCB (also y˚)
Just by looking, you can already tell that <OCB equals 90˚ because it forms a right angle.
Answer: <OCB (also y˚) = 90˚
–How to solve for <OAC (also x˚)
Given (and what we can already know):
<AOC = 40˚
<OCA = 90˚
⇒ Reason: Line AB is a straight line and a straight line equals 180˚. We already know on side of the line because <OCB is 90˚, and so the other side, <OCA, should also be 90˚, since the both sides that make up the straight line equal 180˚ (90˚ + 90˚ = 180˚). You can also tell that <OCA forms a right angle in the triangle because line AB is perpendicular to point O, and right angles are 90˚.
To Solve:
⇒ Since we know two angles in the triangle, we should know the third; and they all add up to 180˚. This can be written as:
40˚ + 90˚ + <OAC = 180˚
⇒ Solve for <OAC by simplifying:
130˚ + <OAC = 180˚
⇒ Subtract 130˚ from both sides to get:
130˚ − 130˚ + <OAC = 180˚ − 130˚
⇒ Isolate <OAC:
<OAC = 50˚
Answer: <OAC (also x˚) = 50˚
I hope you understand and that this helps with your question! :)
Whats The Answer Can you please explain? MATH..
Answer:
d
Step-by-step explanation:
Answer: D
Step-by-step explanation:
Because the world less than would be subtract.
Hope it was correct I'm so sorry if I wasn't.
Glad I could help tho!
How many books are on each shelve if there are 64 books on 4 shelves?
Answer:
In each shelves there are 64/4 books I.e. 16.
Find the lengths of the diagonals of rectangle QRST, if QS=14x+10 and RT=11x+22.
Answer:4
Step-by-step explanation:
diagonals of a rectangle are equal therefore QS=RT, 14x+10=11x+22, and solve for x to get 3x=12, so x equals 4
A 2-column table with 4 rows. Column 2 is labeled Hours x with entries 1, 2, 3, 4. Column 2 is labeled Dollars y with entries 1.25, 2.50, 3.75, 5. On a coordinate plane, a line goes through (1, 1.25) and (4, 5).
The models represent a real-world problem. Select the statements that describe the problem. Select all that apply.
The two variables are dollars and hours.
The two variables are 1 and $1.25.
The correct equation is y = 1.25x.
The correct equation is y = 1x.
Melissa charges $1.25 an hour to pet-sit.
Melissa charges $1 more than the number of hours she pet-sits.
The two variables in this problem are dollars and hours
Melissa charges $1.25 per hour to pet-sit.
What are coordinates in a graph?The coordinates in a graph indicate the location of a point with respect to the x-axis and y-axis.
The coordinates in a graph show the relationship between the information plotted on the given x-axis and y-axis.
We have,
The table and the given points on the coordinate plane provide information about the relationship between the number of hours of
pet-sitting (x) and the amount of money earned (y) by Melissa, who charges a fixed rate of $1.25 per hour for pet-sitting.
The equation of the line passing through the points (1, 1.25) and (4, 5) can be found by using the slope-intercept form:
y - y_1 = m (x - x_1),
where m is the slope and (x_1, y_1) is a point on the line.
Using the two given points, we have:
m = (y_2 - y_1)/(x_2 - x_1)
= (5 - 1.25)/(4 - 1)
= 1.25
y - 1.25 = 1.25 (x - 1)
y = 1.25x - 0.75
This means that for each additional hour of pet-sitting, Melissa earns an additional $1.25.
Therefore,
The two variables in this problem are dollars and hours
Melissa charges $1.25 per hour to pet-sit.
Learn more about coordinates here:
https://brainly.com/question/13118993
#SPJ3
Answer:
The two variables are dollars and hours. The correct equation is y = 1.25x. Melissa charges $1.25 an hour to pet-sit. or 1,3,5
h(x) = x-11
h ( ) =-5
Answer:
6
Step-by-step explanation:
Suppose you buy ticket for out of a lottery of 1000 tickets where the prize for the one winning is to be 800. How much money do you take home (after paying for it)?
the answer to the question 2. Suppose you buy a ticket for $6 out of a lottery of 1000 tickets where the prize for the one winning is to be $800. How much money do you take home (after paying for it)? is -$5.20