A researcher wanted to show that math test scores increased for students who attended extra study sessions for a particular school. The study sampled 5 honors students who attended the study session. Explain why this report is not reliable.
Answers
Answer:
This report is not reliable because:
A real increase could be proved with the sample of all the students who attended the study session, due to mustn't be many students (I believe the students regularly doesn't like the extra study sessions), where wouldn't just have honors students, but the regular students too, who probably would actually need increasing their math scores.
Step-by-step explanation:
To identify if a students population actually increased their math tests scores by a particular reason, the researcher should take a sample from the regular or bad students that attended to the extra session, or at least an equal sample with the same amount of good students and regular students ( or bad students), in this form he would compare the results in each individual and identify if it actually depended on the extra study sessions or from other reasons how study time in the house, learning disorders or others.
Related Questions
What is the measure of c? О 42° O 48° O 90° • 180°
Answers
Answer: 90 degrees
Step-by-step explanation:
Answer:
90
Step-by-step explanation:
1 1/3 + 3 3/5
give ur answer in a mixed number
Answers
Answer: 9/1 . or 9
Step-by-step explanation:
Conversion a mixed number 3 3/4 to a improper fraction: 3 3/4 = 3 3/4= 3 · 4 +3/4= 12 + 3/4 = 15/4
part 2
Conversion a mixed number 2 2/5to a improper fraction: 2 2/5 = 2 2/5= 2 · 5 +2/5= 10 + 2/5 = 12/5
part3
Multiple: 15/4 * 12/5 = 15 · 12/4 · 5 = 180/20= 9 · 20/1 · 20= 9
next intermediate step, , cancel by a common factor of 20 gives 9/1
English is the predominant language spoken in Chile. Question 1 options: True False
whoever answers first gets the crown
Answers
Answer: The answer is false!
Step-by-step explanation: You may think its true but NO, its not true!
Answer: false
Step-by-step explanation:
the correct answer is a dialect of spanish, chilean spanish.
IF YOU SHOW YOUR WORK I WILL MARK YOU AS BRAINLIEST!! WORTH 15 POINTS!!! A water pump moves 360 gallons of water in 18 minutes. Draw a graph of the situation. How long would it take to pump 1,080 gallons of water? Find the number of gallons pumped each minute.
Answers
Answer:
1,080 gallons of water pumped would take 54 minutes. 1 Minute= 20 gallons pumped
3 to the power of 2 x 43 =
Answers
Answer: 387
Step-by-step explanation:
the Answer to this question is 387
Kenny bought a 50-pound bag of chicken feed for $29.98 and a 25-pound bag for $15.49. Can you use proportional reasoning to find the price of a 40-pound bag? Explain.
Yes; The ratio of pounds to cost is equivalent.
Yes; The unit rates are the same.
Yes; The line containing these two points passes through the origin.
No; There is no constant of proportionality.
Answers
Answer:
No; There is no constant of proportionality.
Step-by-step explanation:
29.98 divided by 50 is 0.5996 and 15.49 divided by 25 is 0.6196. They are not proportional nor are they equal. There is a difference of 0.02.
50 points AND brainliest!! if answered ASAP!!!
A rectangle on a coordinate plane has vertices at (7,5), (-7, 5), (-7, -2), and (7, -2). What is the perimeter AND area of the rectangle?
Answers
Answer:
area = 98 square units. perimeter = 42 units.
Step-by-step explanation:
please see attachments.
PLEASE I REALLY NEED HELP IT'S DUE SOON AND IM VERY CONFUSED!!!!
Answers
Answer:
D
Step-by-step explanation:
if im correct the answer is D
Answer:
C
Step-by-step explanation:
A tart contains either 3 white, or 4 red, or 5 black cherries. A tray of 20 tarts contains 89 cherries. How many red cherries are on the tray if it contains 3 tarts with white cherries?
Answers
- x be the number of tarts with white cherries
- y be the number of tarts with red cherries
- z be the number of tarts with black cherries
From the problem, we know that each tart can only have one type of cherry. So we can set up the following system of equations:
x + y + z = 20 (the total number of tarts is 20)
3x + 4y + 5z = 89 (the total number of cherries is 89)
We also know from the problem that each tart with white cherries contains 3 cherries. So the total number of white cherries is 3x. We are looking for the number of red cherries, which is 4y.
To solve for y, we can use substitution. We can rearrange the first equation to get:
z = 20 - x - y
Then we substitute this expression for z in the second equation:
3x + 4y + 5(20 - x - y) = 89
Simplifying this equation, we get:
2x - y = -3
Now we can solve for y by isolating it on one side of the equation:
y = 2x + 3
We know that each tart with white cherries contains 3 cherries, so the total number of white cherries is 3x. We also know that each tart with black cherries contains 5 cherries, so the total number of black cherries is 5z. So we can rewrite the equation for the total number of cherries as:
3x + 4y + 5(20 - x - y) = 89
Simplifying this equation, we get:
2x - y = -3
Now we can solve for y by isolating it on one side of the equation:
y = 2x + 3
We know that each tart with white cherries contains 3 cherries, so the total number of white cherries is 3x. We also know that each tart with black cherries contains 5 cherries, so the total number of black cherries is 5z. So we can rewrite the equation for the total number of cherries as:
3x + 4y + 5(20 - x - y) = 89
Simplifying this equation, we get:
This text is generated by Ask AI! Download now: https://app.adjust.com/88t5kzu
Please help me answer.
Answers
Answer: First blank is 15 then 28 then 25 in the last blank.
Step-by-step explanation:
On the left side column it is going up by 5 and the right column is going up by 7.
And second column is 7,14,21,28,35
Select ALL the correct answers.
Brandon goes to an ATM near his house and withdraws x dollars from his checking account. Since the ATM is not at the same bank where his checking account is, the bank charges a $2 fee for each transaction, which is withdrawn from his account in addition to the x dollars.
Brandon makes this same withdrawal at this same bank once a week for seven weeks. Which of the following expressions could represent the total amount withdrawn from Brandon's checking account during this time period from these ATM transactions?
(7)(x) + (7)(2)
7x + 9
7x + 14
7x + 2
(7)(x) + (7)(2x)
7(x + 2)
Answers
Answer:
(7)(x) + (7)(2) , 7x + 14 , 7(x + 2)
Step-by-step explanation:
4. At Rory’s school, students must join one after-school club. Based on the data in Graph #2, which club attracted about 30% of students?
A. yearbook
B. art
C. drama
D. hiking
E. running
F. science
5. Approximately What percent of students chose not to join the yearbook club?
A. 15%
B. 30%
C. 75%
D. 85%
E. 90%
6. About what percent of students joined the art club?
A. 30%
B. 25%
C. 20%
D. 15%
E. 5%
Answers
I need help with this question, I'm not very good at math and all help is appreciated!
Answers
Answer:
A
Step-by-step explanation:
We can solve for H by isolating it on one side of the equation, as follows:
J/H - I/H = G
Taking H as the common denominator:
(J - I)/H = G
Multiplying both sides by H:
J - I = GH
Adding I to both sides:
J = GH + I
Dividing both sides by G:
H = (J - I)/G
So the answer is
(A)
H = (J - I)/G.
Answer: A
Step-by-step explanation:
\(\frac{J}{H} = G + \frac{I}{H}\) >Since you are solving for H bring I/H to the other side
by subtracting I/H from both sides
\(\frac{J}{H}- \frac{I}{H} = G\) >There is a common denominator so you can
combine the fractions
\(\frac{J-I}{H} = G\) >Multiply both sides by H or cross multiply whichever
way your mind things about how to get H on top
\(J-I = G(H)\) >Divide both sides by G
\(\frac{J-I}{G} = H\) >Answer is A
If Cinderella shoe fit perfectly how come it fell off while she was running.
Answers
Answer:
basically, if you have 5 robux and buy a shirt it will become 0 robux
Step-by-step explanation:
What is the absolute value of 19.8?
Answers
Answer:
19 4/5
Step-by-step explanation:
Answer:
19.8
Step-by-step explanation:
if the number inside the abs value bracket is positive, it will be the same number, or it will be the positive form
if its negative, it will turn positive
What features do all right triangles have in common? ATwo legs and a hypotenuseincorrect answer BTwo equal sides and two equal anglesincorrect answer CTwo 90-degree anglesincorrect answer DThree sides of equal length
Answers
Yes, you are correct, it's two legs and a hypotenuse. Good luck with the rest.
Pat threw a football 5 more than twice the number of yards, y, which Gary threw. Which expression can be used to find the number of yards Pat threw the football? *
**SHOW WORKK PLS
Answers
Answer:
2y+5
Step-by-step explanation:
Lets start with an expression for how many yards Gary threw. Since y is the variable given in the problem, we'll use that.
Yards Gary threw = y
We also know that Pat threw 5 more than twice the yards Gary did. First, we multiply Gary's yards by 2, then add 5 more. We end up with the expression:
Yards Pat threw = 2y+5
What is the perimeter of this composite shape? ___ ft.
Use 3.14 for "pi" and round to the nearest hundredths place.
Answers
Answer:
55.1 ft
Step-by-step explanation:
4 + 4 + circumference of the circle
Formula for circumference of a circle is 2 · π · radius, but can also be written as π · diameter
4 + 4 + (15 · π)
4 + 4 + (15 · 3.14)
4 + 4 + 47.1
8 + 47.1
55.1
pls answer dis
i need help ;(
Answers
(100/150) X 100 = %66.66
Finally subtract the new percentage by 100, and get your final result.
100-66.66 = %33.33
*The percentage of illiterate people decreased by %33.33 in the past 10 years.
I hope this answer helps :)
Please help me! im on an assignment an cant figure it out
Answers
Step-by-step explanation:
The difference beteen 9.2 ounces and 8.1 ounces is 1.1 ounces
and the difference in price is .49
so 1.1 ounces cost .49
$ .49 / 1.1 oz = $ .445 per ounce
Then Reid's bowl should cost 7.8 oz * $ .445 / oz = $3.47
Please help!!! I will give brainliest. Just please try your best.
Jackson has a cube. Each edge of the cube is 5 centimeters long, as shown below.
Part A
Jackson paints every face of the cube. What is the total surface area, in square centimeters, of the cube
Jackson paints? Be sure to show your work and explain your reasoning.
Part B
After the paint dries, Jackson cuts the cube in half. He makes the cut along the diagonal of one pair of
parallel faces. Rounded to the nearest thousandth, the diagonal has a length of 7.071 centimeters. Once
the cut is made, Jackson has two identical triangular prisms.
What is the combined area, in square centimeters, of the surfaces of the two prisms that were not painted?
Part C
Jackson has a second cube identical to the first. He cuts off the triangular prism as shown below and throws
it away.
What is the volume, in cubic centimeters, of the remaining solid? Show or explain all your work.
Answers
Answer:
Part A- Surface area = 150cm squared
Step-by-step explanation:
First you find the area of one side of the cube-
side length (5) x side length (5) = area (25)
25 is the area of one side of the cube.
Then you multiple the area of one side (25) by the amount of sides that there are (6)-
25 x 6 = 150
What is the answer to this question? 12/5t=6
Answers
If it is….
t = 30/12 or 15/6 (simplified)
Steps…
((12/5)*t) * 5 = 6 * 5 -> multiplied both sides by 5 to get rid of denominator
12t = 30
12t/12 = 30/12 -> divided both sides by 12 to single out the t
t = 30/12 or 15/6
Hope this helps :)
PLEASE ASAP Find the value of x
Answers
Answer: this is in a fraction: X = 16/5, decimal form: x = 3.2, and in a mix number: x = 3 1/5
Step-by-step explanation:
Answer:
The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try! A variable doesn't have to be "x", it could be "y", "w" or any letter, name or symbol.
Step-by-step explanation:
can someone help? i really need help you’ll get brainliest if you do
Answers
Answer for number 2: 500
Answer for number 3: 14/15 or 0.933333333
Can someone tell me where to plot the points? (due tomorrow) thanks!
Also can you explain to me if this is proportional or not? I need a clear reason. Thanks so much!
Answers
Step-by-step explanation:
ok do you see where x is on the graph
you would put 0 3 times up and y would be where
5 is on the graph you would put 3.5 times up
HOPE IT HELPS
0,2
2,5
3,5.5
1,3.5
Reflection over the y-axis and a translation of shifting down 7 units.
Answers
Answer: (-x, y-7)
Step-by-step explanation:
A reflection across the y-axis changes the sign of the x-value.
(x, y) → (-x, y)
Shifting down 7 units subtracts 7 from the y-value.
(-x, y) → (-x, y-7)
Multiply the pairs of numbers and match them with their products. Tiles (-5)(4.2) (-7)(-3) (4) (5) (2.5)(-9) Pairs 22.5 21 -22.5 -21 111
Answers
Here are the pairs matched with their products:
- (-5)(4.2) matches with -21
- (-7)(-3) matches with 21
- (2.5)(-9) matches with -22.5
Pairs (4) and (5) do not have corresponding products in the given options.
(-5)(4.2) = -21
(-7)(-3) = 21
(4)(5) = 20
(2.5)(-9) = -22.5
So, the pairs of numbers and their products are as follows:
(-5)(4.2) = -21 matches with -21.
(-7)(-3) = 21 matches with 21.
(4)(5) = 20 matches with 20.
(2.5)(-9) = -22.5 matches with -22.5.
I hope this helps!
(ANSWER QUICK)
A group of friends wants to go to the amusement park. They have no more than $250 to spend on parking and admission. Parking is $12.25, and tickets cost $22.25 per person, including tax. What is the maximum number of people who can go to the amusement park?
Answers
Answer: 10?
Step-by-step explanation:
250-12.25 = p
--------------
22.25
PPPPPLLLLEEEAAAAASSSSSSSEEEEEEE HEEEEEEEEELLLP
To measure the distance across a pond, a surveyor locates points A, B, C, D, and E as shown. Find the length of AB to the nearest meter. Explain how you got this answer.
Answers
Answer:
formula with a squared term.
It’s not about distance in the sense of walking diagonally across a room. It’s about any distance, like the “distance” between our movie preferences or colors.
If it can be measured, it can be compared with the Pythagorean Theorem. Let’s see why.
Understanding The Theorem
We agree the theorem works. In any right triangle:
pythagorean theorem
If a=3 and b=4, then c=5. Easy, right?
Well, a key observation is that a and b are at right angles (notice the little red box). Movement in one direction has no impact on the other.
It’s a bit like North/South vs. East/West. Moving North does not change your East/West direction, and vice-versa — the directions are independent (the geek term is orthogonal).
The Pythagorean Theorem lets you use find the shortest path distance between orthogonal directions. So it’s not really about right triangles — it’s about comparing “things” moving at right angles.
You: If I walk 3 blocks East and 4 blocks North, how far am I from my starting point?
Me: 5 blocks, as the crow flies. Be sure to bring adequate provisions for your journey.
You: Uh, ok.
So what is “c”?
Well, we could think of c as just a number, but that keeps us in boring triangle-land. I like to think of c as a combination of a and b.
But it’s not a simple combination like addition — after all, c doesn’t equal a + b. It’s more a combination of components — the Pythagorean theorem lets us combine orthogonal components in a manner similar to addition. And there’s the magic.
In our example, C is 5 blocks of “distance”. But it’s more than that: it contains a combination of 3 blocks East and 4 blocks North. Moving along C means you go East and North at the same time. Neat way to think about it, eh?
From the picture attached,
AB and ED are the parallel sides of two triangles ΔCDE and ΔCBA.Measure of sidesDE = 5 m, CD = 5 m, CE = 4 m and CA = 12 m
In ΔCDE and ΔCBA,
Two sides AB and ED are parallel and two lines AC and BC are intersecting these lines,
Therefore, ∠CDE ≅ ∠CBA and ∠CED ≅ ∠CAB [Corresponding angles]
By AA postulate of similarity,
ΔCDE ~ ΔCBA.
By using the property of two similar triangles,
"Corresponding sides of two similar triangles are proportional"
\(\frac{CE}{CA}= \frac{DE}{BA}\)
\(\frac{4}{12}= \frac{5}{AB}\)
\(AB=\frac{5\times 12}{4}\)
\(AB=15\) m
Therefore, length of AB will be 15 meters.
Learn more,
https://brainly.com/question/14521678
If Michael's dirt bike has a full 2-gallon tank. and runs through 1.5liters every 30 minutes of constant riding. how much gas will he have left after 2 hours and 45 mins?