Answer:
Design 1
Step-by-step explanation:
Design one would work better because the students get to see both materials (each on one foot) and if they do the same things each day with both feet, they can test how the material works with the activity...If that makes sense
The question is an illustration of a random selection.
The descriptions of the designs are:
Design 1 is a matched pair designDesign 2 is a completely randomized design.Design 1
From the question, we understand that:
15 participants wear material A on the left feet, and material B on the right feet.The other 15 wear material B on the left feet, and material A on the right feet.The above description is a matched pair design, because half of the participants gets randomly assigned to material A and B, while the other half gets automatically assigned to the remaining materials.
Design 2
From the question, we understand that:
15 participants wear material A on both feetThe other 15 wear material B on both feetThe above description is a completely randomized design, because half of the participants gets randomly assigned to material A, while the other half gets randomly assigned to material B.
Read more about random selections at:
https://brainly.com/question/10678373
Nora took 10 bottles of water to a picnic. Of these bottles of water, she and her friends opened a certain number of bottles, b. What expression can be used to determine the number of unopened bottles at the end of the picnic?
Answer:
10 - B = U
Step-by-step explanation:
U stands for the unopened bottles
for example if they opened 3 bottles it would be 10 - 3 = U (unopened bottles)
The value of U is 7 because the 10 bottles of water minus the 3 bottles they opened it would equal 7.
therefore the equation 10 - B = U shows the amount of unopened bottles
54:23
Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the
equation 3x-3-2x+10?
O x = 5
05 = X
-15 = -5x
-5x = 15
Answer: -5x=15
Step-by-step explanation:
f
(9b−1)(9b+1) Me pueden ayudarme con esta otra pregunta Please.
Answer:
Using identify (a+b)(a-b) =a²-b²
Ur answer is (9b-1)(9b+1) =81b²-1
An _____________is an approximate number or answer
Answer:
≈ or estimate
Step-by-step explanation:
Answer:
average
Step-by-step explanation:
In the triangle below, find the measurements of the unknown angles.
2a
75
O °
A. 75°, 1050
OB. 40°, 80°
Oc.
C. 50, 10°
OD. 25°, 50°
O E
E. 35º, 70°
Answer:
E. 35°, 70°
Step-by-step explanation:
Sum of angles add up to 180° in every triangle.
Step 1: Set up equation
a + 2a + 75 = 180
Step 2: Combine like terms
3a + 75 = 180
Step 3: Subtract 75 on both sides
3a = 105
Step 4: Divide both sides by 3
a = 35
So 1 angle is 35°
Step 5: Plug in a to find last angle
2(35) = 70°
Answer:
E. 35°, 70°
Step-by-step explanation:
100 trout are seeded into a lake. Absent constraint, their population will grow by 70% a year. The lake can sustain a maximum of 2000 trout. How many trout will be in the lake after 2 years.
After 2 years, the population of trout in the lake will be 2000 trout.
Given:
Initial population = 100
Growth rate = 70%
Time= 2 years
After the first year:
Population after 1 year = Initial population + (70% of the initial population)
= 100 + (0.7 * 100)
= 100 + 70
= 170 trout
After the second year:
Population after 2 years = Population after 1 year + (70% of the population after 1 year)
= 170 + (0.7 * 170)
= 170 + 119
= 289 trout
Since the calculated population exceeds this limit, the population will be limited to the maximum capacity of 2000 trout.
Therefore, the population of trout in the lake will be 2000 trout.
Learn more about Trout here:
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can someone show me the answer + how they got there? (x+4)(x-1)
Answer:
x^2+3x-4
Step-by-step explanation:
x * x - x + 4x - 4
x^2 - x + 4x - 4
x^2 + 3x - 4
=============================================
Explanation:
You can use the FOIL rule to expand out (x+4)(x-1), but here's another way you could do it.
Let y = x+4
This means we replace (x+4) with y to get y(x-1)
Distribute the y term through to get yx-y which can be written as x(y) - 1(y)
After this, replace y with x+4 getting x(x+4)-1(x+4)
Distribute a second time and simplify like so
x(x+4)-1(x+4)
x^2+4x-1x-4
x^2+3x-4
A ferry transports passengers to three different ports. From port 1, the ferry travels east 3.5 miles to port 2. The ship
then heads 15 east of south for 6 miles to reach port 3. What is the distance from port 3 to port 1? Draw a diagram to
help you. Approximate to the nearest tenth of a mile.
miles
Answer:
7.7
Step-by-step explanation:
trust me, I solved it out
Answer: The distance between port 3 to port 1 is 7.7 miles.
A rough sketch is attached.
The angle between 3.5 and 6 is = (90 + 15) = 105 degrees.
We will need the law of cosine.
So the distance between port 3 to port 1 is:
[tex]\sqrt{3.5^{2}+6^{2}-2\left(3.5\right)\left(6\right)\cos\left(105\right)}=7.68897911912=7.7[/tex].
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can anyone plz help me plz
The constant of proportionality is the slope of the line.
The slope is the change in y over the change in x
Using two pints on the line:
Slope = (3-0) / (1-0) = 3/1 = 3
The answer is 3
what property is this? (−6.8+(−5.1))+6.2=(−5.1+(−6.8))+6.2
Answer:
commutative property
Step-by-step explanation:
Wha is 4/5 = 28/x oh and 2 ways I can writ it
Answer:
x = 35
Step-by-step explanation:
if the width is 8 less than the length of a rectangle and the perimeter is 48 find the width
Answer:
Widyh = 8 units
Step-by-step explanation:
Perimeter = 2/width+length)
then:
48 = 2(W+L)
W = L-8
W = Width
L = Length
then:
48 = 2((L-8)+L)
48 = 2(2L88)
48 = 2*2L - 2*8
48 = 4L - 16
48 + 16 = 4L
64 = 4L
L = 64/4
L = 16
W = L-8
W = 16-8
W = 8
Check:
48 = 2(16+8)
48 = 2*24
What is the image point of (6,1) after a translation left 5 units and down 1 unit?
Answer:
(1, 0 )
Step-by-step explanation:
A translation of 5 units left means subtract 5 from the x- coordinate
A translation of 1 unit down means subtract 1 from the y- coordinate, thus
(6, 1 ) → (6 - 5, 1 - 1 ) → (1, 0 )
HELP ME PLEASE I NEED THE ANSWER
1. Jason, Patti, and Quincy were running around the track during their P.E. class. If each runner ran at a
constant rate of speed, draw a graph to represent each runner's speed in meters per minute. Label
each line with the runner's name.
Running Time
• Patti ran at a rate of 300 meters every 60 seconds.
• Jason ran at a rate of 500 meters per 1.25 minutes.
Quincy ran 600 meters in 2 minutes and 30 seconds.
230
800F
700H
600
5001
at
Distance (meters)
4001
3001
2001
1001
3.75
0.75 1.5 2.25
Time (minutes)
0.15
Fill in the table for each person's time at various distances.
Jason's Time
(minutes)
0
Quincy's Time
(minutes)
0
Patti's Time Distance
(minutes) (meters)
0
0
150
300
450
600
Distance
(meters)
0
200
300
400
500
Distance
(meters)
0
240
360
480
600
1.25
2.5
Who ran the fastest? Explain how this is shown on the graph and in the tables?
Answer:
1) Please find attached the distance and speed time graphs
2) Please find attached the distance time tables
3) The fastest runner is Jason, as shown by the topmost line in the graphs
4) On the tables Jason is seen to have covered 400 meters in one minute, while Patti covered 300 meters and Quincy covered in the same one minute time interval
Step-by-step explanation:
The given speed of the runners are;
The rate at which Patti ran = 300 meters in 60 seconds
The rate at which Jason ran = 500 meters in 1.25 minutes
The rate at which Quincy ran = 600 meters in 2 minutes and 30 seconds
The formula for speed is given as follows;
Speed = Distance ran/(Time to cover the distance)
Therefore, the speed of each of the runners are;
Patti's speed = 300 m/(60 seconds) = 300 m/(1 minute) = 300 m/min
Jason's speed = 500 m/(1.25 minute) = 400 m/min
Quincy's speed = 600 m/(2 minutes and 30 seconds) = 600 m/(2.5 minutes)
∴ Quincy's speed = 240 m/min
Therefore, we have
1) The distance and speed time graphs are attached
2) The distance time tables are attached
3) The fastest runner is Jason, as shown by the topmost line in the graphs
4) The fastest runner is Jason as seen by the covered distance of 400 meters in one minute.
What are the steps to answer 6x-2=-4x+2
Answer: [tex]x=2/5[/tex] or [tex]x=0.4[/tex]
Simplify the equation to the form
[tex]6x-2=-4x+2[/tex]
Move all terms containing x to the left and all other terms to the right
[tex]6x+4x=+2+2[/tex]
Simplify left and right side of the equation
[tex]10x=+4[/tex]
Divide both sides of the equation by 10 to get x
[tex]10x/10=4/10[/tex]
[tex]x=2/5[/tex] or [tex]x=0.4[/tex]
write a word problem for this equation $2 x n = $18
Answer:
If You have $18, how many $2 items can you purchase?
Once a hot-air balloon reached its highest point, it dropped 25 feet. Then five minutes later, it dropped another 13 feet. Find its total change in altitude during this time.
Answer:
The total change of altitude should be, -38ft.
Step-by-step explanation:
6x + 3 (2x) - 7 - 2³ Please include th steps to solving it.
Answer:
24x-15
Step-by-step explanation:
Let's do this together with a step-by-step explanation!
First we need to make sure we remember that there are appropriate ways on how to solve these. LIKE PEMDAS.
6x + 3 (2x) - 7 - 2³
Let's multiply the 3 and 2x together.
6x + 6x - 7 - 2³
Now let's do the exponent
6x + 6x - 7 - 8
Now let's add everything together! But remember only common variables can be added together.
24x - 15 is the answer.
You can no longer break anything down.
I really hope this helped you!
Answer:
12x - 15
Step-by-step explanation:
so you would have to do the order of operations. so your exponent would be first. so 2×2×2=8.
6x + 3 (2x) -7 + 8
Now you can look at your parentacese which is (2x) so you need to do 3(2x) which gets you 6x.
6x + 6x -7 + 8
So you need to combine like terms.
so starting with the x
6x + 6x = 12x
Now your equation looks like this
12x + -7 +8
now you need to add like terms. (numbers)
-7 -8
so your answer is
12x -15
In ΔQRS, the measure of ∠S=90°, QR = 8.2 feet, and SQ = 4.2 feet. Find the measure of ∠R to the nearest degree.
Answer:
R=30.81≈31
Step-by-step explanation:
Answer:
R=30.8
Step-by-step explanation:
The answer you'd get on the calculator when simplisfied is 30.81, and when that answer is rounded to the nearest tenth, it'd equal 30.8 and not 31
Calculate 12 x 15 by changing the numbers into friendlier numbers as we saw in the videos. Show how you work it out – write out your methods using the number keys on your computer here: Please write your response.
Answer:
The product 12 × 15 in friendlier numbers is (10 + 2) × (10 + 5) = 180
Step-by-step explanation:
The parameter given are;
To 12 × 15 by changing the numbers into friendlier numbers
The product in 12 × 15 written with friendlier numbers (or in a simplified format can be given as follows;
12 × 15 = (10 + 2) × (10 + 5)
Which gives;
(10 + 2) × (10 + 5) = 10² + 10 × 5 + 2 × 10 + 2 × 5
From which we have;
10² + 10 × 5 + 2 × 10 + 2 × 5 = 100 + 50 + 20 + 10 = 180
Therefore;
12 × 15 = 180.
write a pair of equal angles which are supplementary
Step-by-step explanation:
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What is x2=361 equation for x
Answer:
x = ± 19
Step-by-step explanation:
x² = 361
x = ±√361
x = ± 19
which of the following appear in the diagram below?
check all that apply.
Answer:
A
Step-by-step explanation:
x-8/2=4 please help me asap this assignment is due in and hour! and please teach me how to do it! 10 points!!
Answer:
x = 8
Step-by-step explanation:
x - 8/2 = 4
Follow your order of operations and divide first.
8/2 is 4
x- 4 = 4
Next, isolate the variable by using the additive property of equality.
x - 4 + 4 = 4 + 4
x = 8
Answer:
ok so u do the opposite of 8/2 so do 8*2 which is 16 then add the answer which is 4 which equals 20 so 20- 8/2=4, 20-16=4
what is the answer to 9 + 10?
Answer:
19
Step-by-step explanation:
its just addition
Answer:
67
Step-by-step explanation:
its simple baby:)
1) ¿CUÁLES DE ESTAS OPERACIONES SE PUEDEN EXPRESAR COMO POTENCIAS? ¿POR QUÉ? a) 4 x 4 x 4 x 4 b) (-3) +(-3) + (-3) c) 7 + 7 + 7 d) 7 x 7 x 7 e) (-2) x (-2)
Answer:
4 × 4 × 4 × 4 7×7×7(-2)×(-2)Step-by-step explanation:
solo las expresiones con signos de multiplicación pueden expresarse como potencias
[tex]4\times 4\times4\times4 = 4^4\\\\7\times7\times7 =7^3\\\\(-2)\times(-2) = (-2)^2[/tex]
what is a - 6 = 13 (solve the equation, check your solution)
Answer:
A=19
Step-by-step explanation:
Add 6 to both sides
Answer:
a = 19
Step-by-step explanation:
a - 6 = 13
+6 +6
a = 19
Checked: 19 - 6 = 13
What is a fraction grader than 33% and less than 1/2
Answer: 45% or 9/20
Step-by-step explanation:
50% is half and 33% is 1/3. 45% is less than 50% and greater than 33% and 9/20 is the simplified fraction form of 45%.
Solve the inequality for w.
-5w>20
Simplify your answer as much as possible.
Answer:
Step-by-step explanation:
-5w > 20
w < -4
Find the value of each variable in the parallelogram.
Answer:
w = 2, z = 7
Step-by-step explanation:
If you have any questions about the way I solved it, don't hesitate to ask ;)