Erin wants to know if warming up will help runners sprint faster. Twenty-six track and field athletes volunteered to participate in her study. She randomly assigns 13 athletes to warm-up for 10 minutes. All 26 participants sprint the same distance. She calculates the mean for each group and determines that the mean for the warm-up group was 10.9 seconds, and the mean for the other group was 12.9 seconds. To test the difference of means she re-randomized the data 54 times, and the differences are plotted in the dot plot below. What can Erin conclude from her study? (6 points) A dot plot is shown labeled from negative 2.5 to positive 2. Above the negative 2.5 are 3 dots. Above the negative 2 are 6 dots. Above the negative 1.5 are 9 dots. Above the negative 1 are 12 dots. Above the negative 0.5 are 6 dots. Above the 0.0 are The difference in the means is not significant because a difference of 2 is not very likely. The difference in the means is not significant because a difference of 2 is very likely. The difference in the means is significant because a difference of 2 is very likely. The difference in the means is significant because a difference of 2 is not very likely.
Answer:
hope it Helps
Step-by-step explanation:
Brainliest please
Answer: the answer above me was not correct for me.
Step-by-step explanation:
The larger triangle is a dilation of the smaller triangle with a center of dilation at (1,−1).
What is the scale factor of the dilation?
18
14
4
8
Answer:
just 4 I think
Step-by-step explanation:
the bottom of the bigger triangle is 8 and the little one is 2
8÷2= 4
Answer: just took the test. the answer is 4!
Step-by-step explanation:
which statement is true
Answer:
c
Step-by-step explanation:
im a math genius
Explain how to use the associative property of multiplication to simplify the following expression and find the final value: (2 * 8) *5
please don't answer with files they don't work i will try to mark who ever get it correct brainliest
Explain what sampling is and how it is used to estimate a population?
In 5-7 sentences please
I will give Brainliest
Simplify the expression:
[tex]\left(\frac{1}{2}\right)^{2}\cdot\frac{9}{11}+\frac{2}{3}[/tex]
Plz give steps.
Answer:
[tex]\frac{115}{132}[/tex]
Step-by-step explanation:
[tex](\frac{1}{2} )^{2} * \frac{9}{11} + \frac{2}{3}[/tex]
= [tex]\frac{1}{4} * \frac{9}{11} + \frac{2}{3}[/tex]
= [tex]\frac{9}{44} + \frac{2}{3}[/tex]
= [tex]\frac{27 + 88}{3(44)}[/tex]
= [tex]\frac{115}{132}[/tex]
Henry received 7/8 of the vote in the election for captain of the baseball team. What percent of the vote did he receive?
Answer:87.5%
Step-by-step explanation:
Given
Henry received [tex]\frac{7}{8}[/tex] of the votes in the election
i.e. 7 parts of votes are in favor of Henry out of 8
In terms of percentage, it is given by
[tex]\Rightarrow \dfrac{7}{8}\times 100=87.5\%[/tex]
Help me please it’s due today and I really need this
Answer:
J
Step-by-step explanation:
If you look closely, you can see the slope line is decreasing which means all the positive slopes are automatically wrong, and second the first point the line intersects with the graph is 6 down which means the answer is -6
Apr 14, 10:17:07 PM
Find mZKML.
hs
M
Answer: mZKML
O
Answer and Step-by-step explanation:
The answer is 42°.
This is because we are given an Isosceles Triangle. Isosceles Triangles always have 2 legs/sides that are the same length, and because those two sides have the same length, it means their base angles have the same value as well.
So, Since the angles LKM and KML are the base pairs of this Isosceles Triangle, they are equal to each other.
#teamtrees #PAW (Plant And Water)
3+b^3+b^2 in standard form
Need answer quick!!!!!
Answer:
27 inches squared
Step-by-step explanation:
cut it in half. then you will have the cube and the rectangle
3x3 is 9 and 2x9 is 18
9+18 is 27
Running at a constant rate, Miguel ran 12 miles in a time of 120 minutes. How many minutes does it take Miguel to run 6 miles?
Answer:
20
Step-by-step explanation:
120/6
Answer:
60 minutes
Step-by-step explanation:
First, lets write the problem into an equation
12 miles/120 minutes = 6 miles/x minutes
Then, we solve
12/120 = 6/x
12x = 720
x = 60
Therefore, your answer is 60 minutes
PLEASE HELP!
A camper is flying a kite at the end of a string 250 feet long. If they look up to
the kite at an angle of 43 degrees, what is the approximate height of the kite? (Round
your answer to the nearest foot.).
hypotenuse is 250 feet.
base angle is 43 degrees.
trignometery here I come!
Since we must find the height, aka adjacent side of right triangle, and we have the given hypotenuse
We shall use the sine!
sinθ is sin43
sin43 = A/H = x/250
multiply both sides by 250
250 (sin43) = x
DEGREE MODE on graphing calculator! [because the θ is in degrees mode]
x ≈ 171
Answer: x ≈ 171 feet
Luis has some nickels, dimes, and quarters. The value of all of the coins, in cents, is represented with the expression shown.
5(2 + 2) + 10x + 25 (3x + 1)
Which part of the expression represents the number of quarters that Luis has?
A. x+2
B. 10x
C. 3x+1
D. 25(3x+1)
B.
10.
C
3.2 +1
D.
25 (3x + 1)
Answer:
The part of the expression that represents the number of quarters is;
D. 25·(3·x + 1)
Step-by-step explanation:
From the question, we have;
The values of the coins Luis has = Nickels, Dimes and quarters
The expression that represents the value of all the coins in cents is given as follows;
5(x + 2) + 10·1 + 25·(3·x + 1)
The value of a nickel = 5 cents
The value of a dime = 10 cents
The value of a quarter = 25 cents
Therefore, the part of the expression representing the number of quarters Luis has, has 25 as a factor
Therefore, the part of the expression that represents the number of quarters = 25·(3·x + 1).
Simplify fully 8x/12x2y
Answer:
2/3xy.
Step-by-step explanation:
8x/12x^2y
The 8 and 12 simplify to 2/3 and x and x^2 simplify to 1/x so we have:
= 2/3xy.
PLEASE HELP 2 QUESTIONS! - YOU WILL GET 20 POINTS - MULTIPLE CHOICE - YOU WILL GET BRAINLIST - MATH
Answer:
choice 1) corresponding angles
choice 1) vertical angles
Step-by-step explanation:
Answer:
On the first one, angles 1 and 5 are corresponding angles and on the second one, angles 2 and 3 are vertical angles.
Step-by-step explanation:
brainliest
If there are 60 seconds in an minute, 60 minutes in an hour, 24 hours in a day, and 7 days in a week, how many seconds are in a week? Hint: Use a calculator to solve this problem.James and Kelly have $10 to spend at a grocery store. If they get 3 avocados which cost $1 each, 4 tomatoes which cost a total of $2 for all 4, and two loaves of bread which cost $2 each, how much change will James and Kelly receive after their purchase?
Answer:
Part a) 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 7 days in a week, how many seconds are in a week
60x60=3600 x 24= 86400 x 7= 604800
So 604,800 seconds in a week
Part b) James and Kelly have $10 to spend at a grocery store. If they get 3 avocados which cost $1 each, 4 tomatoes which cost a total of $2 for all 4, and two loaves of bread which cost $2 each, how much change will James and Kelly receive after their purchase?
So 3 x 1= $3
+ $2
2 x 2= $4
3+2+4= $9
10-9= $1
So they'll get back $1
Write LCM of 35 and 144 (If you are not able to send a picture, then you can write step wise, please do not write a direct answer.)
Answer:
5040Step-by-step explanation:
multiply 35 by 144 which will give you your answer (lcm)find: P (large or blue)
Answer:
Blue: DDD
Step-by-step explanation:
Answer:
7/10
Step-by-step explanation:
;)
I will mark you brainlist!
A. 24.12
B. 50.24
C. 58.14
D. 96.02
need help thanks! :D
Answer:
2nd
Step-by-step explanation:
The perimeter of the triangle is 29 cm.
a. Write an equation and solve for x.
b. Use the value of x to find the lengths of the sides of the triangle.
c. What kind of triangle is this: scalene, isosceles, or equilateral? Explain how you know using the calculated side lengths, not the picture
2x+2
3x - 1
x + 4
Answer:
Step-by-step explanation:
Equation
2x + 2 + 3x - 1 + x +4 = 29 Collect like terms on the left
6x + 5 = 29 Subtract 5 from both sides
6x = 29 - 5
6x = 24 Divide by 6
x = 24/6
x = 4
Length of the Sides.
2x + 2 = 2*4+2 = 10
3x - 1 = 3*4 - 1 = 12 - 1 = 11
x + 4 = 4 + 4 = 8
Type of Triangle
Scalene.
Match each technique with its purpose.
reversal
to directly mimic something for comedy
ridicule
to present something as the opposite of
what is expected or normal
to criticize a subject by making it seem
ridiculous
parody
The terms are matched is Exaggeration: Makes something seem too good or too bad.
What are Literary terminology?Literary terminology refers to the techniques, styles, and formats used by writers and speakers to skillfully emphasize, decorate, or enhance their composition.
Reversal: Changes circumstances suddenly
Exaggeration: Makes something seem too good or too bad
Parody: Mimics a subject directly
Ridicule: Makes a subject appear to be silly
Satire: Exposes human weakness
Hence, the sentences are matched above according to Literary terminology. It can refer to the playful techniques that comedians use to make us laugh, or the witty tricks that Wordsmith uses to shape new words and phrases in their composition.
Therefore, the terms are matched is Exaggeration: Makes something seem too good or too bad.
Learn more about the Literary terms here:
brainly.com/question/19034685.
#SPJ7
Please help me with this
2x[tex]2x^{2}-3x-5[/tex]
Answer:
2x²-3x-5
=2x²-3x-5
=2x²-5x+2x-5
=2x(x-5)+2(x-5)
=(x-5)(2x+2)
Answer:
(x + 1)(2x - 5)
Step-by-step explanation:
Assuming you require the expression factorised.
2x² - 3x - 5
Consider the factors of the product of the x² term and the constant term which sum to give the coefficient of the x- term.
product = 2 × - 5 = - 10 and sum = - 3
The factors are + 2 and - 5
Use these factors to split the x- term
2x² + 2x - 5x - 5 ( factor the first/second and third/fourth terms )
= 2x(x + 1) - 5(x + 1) ← factor out (x + 1) from each term
= (x + 1)(2x - 5) ← in factored form
Here is a graph of the relationship between the height and volume of some cylinders that all have the same radius, R. An equation that represents this relationship is V =Rºh (use 3.14.as an approximation for 7). What is the radius of these cylinders?
Answer:
Radius is 1 unitStep-by-step explanation:
The relationship is:
V = πr²hWe have points on the graph:
(9, 28.26) and (18, 56.52)Use one of the points, substitute into equation and solve for r:
28.26 = 3.14*9*r²r² = 28.26/28.26r² = 1r = 1PORS and XYZ are straight lines.
PS is parallel to XZ.
Prove that the angle sum of any triangle is 180°
I have no idea
Step-by-step explanationI have no idea
Ariana bought 5 dozen pears at $36 per dozen . She discovered that 7 were rotten and she sold the rest at $4.50 each . Calculate the profit or loss she made on the sale of all the good pears . don't send in file okay
Step-by-step explanation:
1 dozen = 12 pears
12 pears = $36
1 pear = 36/12 = $3
Total Cost of Pears = No. of pears x price of 1 pear
= (5x12) x 3
= 60 x 3
= $180
Sale of Pears = Price per pear x (Total Pears bought - Rotten Pears)
= $4.50 x (5x12-7)
= $4.50 x 53
= $238.50
Profit/Loss = Sale of Pears - Total Cost of Pears
= $238.50 - $180
= $58.50
Ariana made a profit of $58.50.
Answer:
$58.5 (profit)
Step-by-step explanation:
Ariana bought 5 dozen pears at $36 per dozen.
The value of 1 dozen = $ 36
Her buying amount = $36 * 5 = $180
The value of 1 pear = $ 36/12
= $3
The value of 7 pears= $3 * 7 = $21
She sold the remaining (53) at $4.50 each.
Her, selling amount = $4.50 * 53
= $238.50
Her profit amount = selling amount - buying amount
= $238.50 - $180
= $58.5
What it the length of the leg
which list shows these numbers in order from least to greatest
Answer:
B) -5, -2.4, 20%, sqrt(9), 3pi
Step-by-step explanation:
sqrt(9) = 3
3pi = 3 * 3.14 = 9.42
20% = 0.2
Answer: B) -5, -2.4, 20%, sqrt(9), 3pi
i think it is "b" but im not 100% sure because im learning this right now too. i hope this helped :)