Answer: The first study was an observational study whereas the second was a controlled experiment.
Step-by-step explanation:
A study that record the characteristics of a population by studying individuals in a sample, but does not manipulate variables of interest is known as an operational study. Like in the first study only effects have been noted.
A controlled experiment is an experiment where the variable of interest is directly manipulated by a scientist, in order to test a single variable at a time.
Like in the second study, the subjects were under the control of the experimenter, to test the effect of oil.
The first study was an observational study whereas the second was a controlled experiment.
Answer:
Person above is right, i took this test.
Step-by-step explanation:
in figure ABCD IS A PARALLELOGRAM, find angle c
Answer:
in a parallelogram the consecutive angles are equal to 180
ange C = 180-110 = 70
Step-by-step explanation:
The school store sells pencils for $0.30 each, shirts for $14.50 each, and notebooks for $3.20 each.
a. The cost of 4 pencils, 1 shirt, and 3 notebooks is?
b. Sarah brought $10 to the store. She bought 2 notebooks and 3 pencils. How much money does she have left? $
the correct answer is $3.70
Answer:
a. 0.3p +14.5s +3.2n (the expression for the given story)
0.3(4) + 14.5 (1) + 3.2(3) (plug in the given values, and multiply)
1.2 + 14.5 + 9.6 (add)
15.7 +9.6
$25.30 (how much it costs)
b. 0.3p + 3.2n (expression for part b)
0.3(3) + 3.2(2) (plug in the given values and multiply)
0.9 + 6.4 (add)
7.3 (how much what she bought cost)
10 - 7.3= 2.7 (how much she brought, with how much she bought subtracted)
$2.70 left (this is how much she has left)
Step-by-step explanation:
I hope this helped :)
PLEASE HELP!!!! WILL GIVE BRAINLIEST
Answer: Ok first if you read the directions read them again, then you look at the problem carefully and make an equation that should look close to this: 0.75xp=c, Once you have that equation you have to replace the p with a 2 and multiply to get an answer of 1.50. The second part would be taking 0.5x2 which is easy it would be 0.10 then you take that and minus it from the total of the last problem which would get you to $1.40
Step-by-step explanation:
In the following scenario, which is the most important criteria in evaluating the technological device?
A parent needs a computer that can hold family photos.
Connectivity
Size
Speed
Storage
Answer:
storage
Step-by-step explanation:
Answer:
Storage
Step-by-step explanation:
3
Ms. Crawford gave the same amount of plant food to each of 5 plants. She used-pound of plant food in all. How much plant food did she give to each plant?
A state official wants to know which party the voters in his state feel is best qualified to lead the country over the next 10 years. He mails a questionnaire on this subject to a SRS of 1600 voters in his state. His staff reports that 325 questionnaires have been returned, of these 241 respondents feel the Democratic Party is best qualified to lead the country over the next 10 years.
1. The sample is:__________
A. the voters in his state
B. the 325 questionnaires returned
C. the 241 voters who feel the Democratic Party is best qulified
D. the 1600 voters receiving the questionnaire
2. This is an example of:___________
A. a survey containing nonresponse
B. a survey with little bias because a large SRS was used
C. a survey with little bias since the voters know what they want.
D. All of the above
Answer:
1. B
2. C
Step-by-step explanation:
1. B
The sample of any set would be smaller version of a larger group. It is often a subset that contains some or all the characteristics of the main set, or the larger general population. The usage of samples comes into play in statistics when the population sizes of interest are too large for the test to contain all the needed members for it to take place. So, from this question, the sample size is the 325 questionnaires that were returned in the first place.
2. C
I thin the answer is survey with little bias since the voters know what they want. This is because while answering the survey, the voters know who they want to vote for upfront, and didn't need to gave their mind change by anyone on the survey.
Highest to lowest -0.6,0.38, -0.09, 0.7
Answer:
0.7, 0.38, -0.6, and -0.09
Step-by-step explanation:
Hey there!
Guide:
• NEGATIVES are BELOW zero
• POSITIVES are ABOVE zero
• DECIMALS are BELOW zero
Highest to lowest: –0.6, 0.38, –0.09, 0.7
0.7 ⬅️ HIGHEST
0.38 ⬅️ 2nd HIGHEST
–0.09 3rd HIGHEST ⬅️
–0.6 ⬅️ LOWEST
Answer: 0.7 , 0.38, –0.09, and –0.6 ☑️
Good luck on your assignment and enjoy your day!
~LoveYourselfFirst:)
2. Write an addition problem with
integers to solve this problem.
Sue took good care of her
meat-eating plant. It grew
from a seed to a six-inches tall
plant in three weeks. Then she
forgot to water it. The plant
lost two inches in height.
How tall was the plant then?
1081
Someone
has
shrunk
8C
Answer:
i would if you put me brainilest
Step-by-step explanation:
\begin{aligned} &y=-8x -3 \\\\ &x+y=7 \end{aligned}
y=−8x−3
x+y=7
Answer:
just download conects
Step-by-step explanation:
combine like terms 5x - 7y + 2x + 10y + 4
Answer:
7x+3y+4Step-by-step explanation:
Find the number of faces, edges, and vertices of this shape.
Over the next 17 months you have to read at least 68 books. You have to read x books per month.
The inequality 17x2 68 represents this situation. Solve the inequality to find the number of books
you have to read per month.
Answer:
You have to read 4 or more books per month.
Step-by-step explanation:
Given that:
Number of months to read the books = 17 months
Number of books to read = 68 at least
Number of books per month = x
The inequality for the situation is;
[tex]17x\geq 68[/tex]
Dividing both sides by 17
[tex]\frac{17x}{17}\geq \frac{68}{17}[/tex]
x ≥ 4
Hence,
You have to read 4 or more books per month.
Linear or not linear, PLZ I’m freaking out cause this is due in like 15 mins PLEASE HELP ME
Answer:
no yes yes no
Step-by-step explanation:
because linear means straight line if the line isnt a straight equation its wrong (: other ones have example: ^3 and ^2 so that makes the problem not straight anymore (:
pwease help me and i will mark u brainliest
Answer:
19/15
Step-by-step explanation:
We need to find the difference, so subtraction. But first we should make them improper fractions:
(18/5)-(7/3)
Lets make the common denominator 15:
(54/15)-(35/15)
54-35= 19
19/15
integration sin2Xdx
Answer:
[tex] - \frac{ 1}{2} \cos(2x) + c[/tex]
simplify 5(6k+3+7k+3y)
Answer:
65k+15+15y
Step-by-step explanation:
distribute the 5
30k+15+35k+15y
add all like terms
65k+15+15y
Answer:
65k+15y+15
Step-by-step explanation:
Add 6k and 7k.5(13k+3+3y)
Apply the distributive property.
5(13k)+5⋅3+5(3y)
Simplify.
65k+15+15y
Move 15.
65k+15y+15
Solve for x in the equation x squared + 11 x + StartFraction 121 Over 4 EndFraction = StartFraction 125 Over 4 EndFraction.
x = negative 11 plus-or-minus StartFraction 25 Over 2 EndFraction
x = negative eleven-halves plus-or-minus StartFraction 25 Over 2 EndFraction
x = negative 11 plus-or-minus StartFraction 5 StartRoot 5 EndRoot Over 2 EndFraction
x = negative eleven-halves plus-or-minus StartFraction 5 StartRoot 5 EndRoot Over 2 EndFraction
The solution of the equation will be x = - 11/2 ± 5√5/ 2. Then the correct option is D.
What is the solution of the quadratic equation by formula method?The quadratic equation is given as ax² + bx + c = 0.
Then the solution is given as
[tex]\rm x = \dfrac{-b\pm \sqrt{b^2 - 4ac}}{2a}[/tex]
The quadratic equation is given below.
x² + 11x + 121/4 = 125/4
x² + 11x + – 1 = 0
Comparing with the standard equation, we have
a = 1, b = 11, and c = –1
Then the roots of the equation will be
[tex]\rm x = \dfrac{-11\pm \sqrt{11^2 - 4*1*(-1)}}{2*1}\\\\\\\rm x = \dfrac{-11 \pm \sqrt{121 +4}}{2}\\\\\\\rm x = \dfrac{-11\pm \sqrt{125}}{2}\\\\\\x = \dfrac{-11}{2}\pm \dfrac{5\sqrt{5}}{2}[/tex]
Then the correct option is D.
More about the solution of the quadratic equation link is given below.
https://brainly.com/question/17376136
#SPJ5
Answer: C
Step-by-step explanation:
What percent of 54 is 28?
F) 192%
G) 19%
H) 0.52%
Answer:
Step-by-step explanation:
H
7
3
Damon saw of the paintings in a museum. Omar saw of the
8
8
paintings in the museum. What fraction more of the museum's
paintings did Damon see than Omar? Simplify the answer if possible.
Answer:the answer is 1/2
Step-by-step explanation:
all you have to do is subtract 7/8 from 3/8 and you get 4/8. And after that all that has to be done Is a bit of simplfing. Really this question is not that hard.
Which sequence of transformations will change figure PQRS to figure P′Q′R′S′?
a. Counterclockwise rotation about the origin by 90 degrees followed by reflection about the x-axis
b. Counterclockwise rotation about the origin by 180 degrees followed by reflection about the x-axis
c. Counterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axis
d. Counterclockwise rotation about the origin by 90 degrees followed by reflection about the y-axis
Answer:
d. Counterclockwise rotation about the origin by 90 degrees followed by reflection about the y-axis
Step-by-step explanation:
Solid transformation is a process which changes the orientation, shape and size of a given objects. Types of solid transformation are: rotation, reflection, dilation etc. This process would produce an image of the initial figure which has been transformed appropriately.
From the given question, figure PQRS can be transformed into P′Q′R′S′ by a counterclockwise rotation at [tex]90^{o}[/tex] about the origin. This would be followed by a reflection about the y-axis.
Thus, the correct option is D.
i need help pls due today
Answer:
-7a + - 11 or -7a - 11
Step-by-step explanation:
1. -0.5 x 14a = -7a
2. -0.5 x 22 = -11
Answer:
-7a + 11
Step-by-step explanation:
-0.5(14a - 22)
Distribute:
-0.5 times 14a = -7a
-0.5 times -22 = 11
so you have:
-7a + 11
The vertices of the image of GHJK after a translation are given. Choose the vector that describes the translation.
Answer:
Option B
Step-by-step explanation:
Let's take a vertex G of quadrilateral GHJK to understand the rule for the translation,
From the graph attached,
Coordinates of G → (-5, 5)
Coordinates of the image point G' after the translation → G'(-5, 5)
Let the point G is translated 'a' units to the right and 'b' units down,
Rule for this translation,
G(x, y) → G'(x + a, y - a)
By this rule,
G(-5, 5) → G'(-5 + a, 5 - a)
-5 + a = -5 ⇒ a = 0
5 - a = 5 ⇒ a = 0
Therefore, vector that defines the translation will be,
<0, 0>
Option B is the the correct option.
The vector that describes the translation of the image is: b. (0, 0).
Recall the rules of translation:
The image attached below shows how an image is translated using a rule.In the image, since we are down to the right, the rule for the translation is given as: [tex](x + x_1, y - y_1)[/tex], where [tex]a[/tex] = units moved to the right, and [tex]b =[/tex] units moved downwards.Thus, from the image given to us showing the image of GHJK, using one of the vertex J' (-3, 3) and the translation rule, [tex](x + a, y - b)[/tex], the vector describing the translation can be determined as follows:
The coordinates of vertex J = (-3, 3)
[tex]x = -3 \\\\ y = 3[/tex]
Substitute[tex]J(-3, 3) = (-3 + a, 3 - b)\\\\-3 = -3 + a\\\\-3 + 3 = a\\\\\mathbf{0 = a} \\\\\\3 = 3 + b\\\\3 - 3 = b\\\\\mathbf{0 = b} \\\\[/tex]
Therefore, the vector that describes the translation of the image is: b. (0, 0).
Learn more here:
https://brainly.com/question/3222741
Use compatible numbers to estimate the quotient.674.8 ÷ 23
Answer:
~30
Step-by-step explanation:
By using division, the answer is 29.34. If the question is asking to estimate, I would estimate the quotient as 30.
Mickey owns 3/4 of an acre of land. He wants to sell 1/3 of his land to Minnie. What fraction of an acre does Mickey want to sell?
(Please Help Me)
Answer:
1/4
Step-by-step explanation:
broken up, 3/4 is 1/4+1/4+1/4, take one of the 3 away, and the one you take away is 1/4.
OMG OKAY SORRY BUT AGAIN WILL DO ABSOLUTELY ANYTHING FOR THIS ONE
Answer:
55
Step-by-step explanation:
sinx = opposite/hypotenuse = 9/11
x = arcsin(9/11) = 54.9031987, which is about 55, degrees
Phillip wanted to leave a 15% tip. He thought to himself that 15% = 10% plus half of 10%. Which of the following equations will help phillip estamate the tip on a $36.00 bill correctly?
A. $3.60 + $3.60 = $7.20
B. $3.60 + $1.80 = $5.40
C. $3.60 + $0.36 = $3.96
D. $1.80 + $1.80 = $3.60
Answer:
u see I did this add all the answer together to get the answer
Answer:
A
Step-by-step explanation:
24 + 8p = – 8(5 + 3p)
Answer:
p= -2
Step-by-step explanation:
24+8p= -40-24p
32p= -64
p= -2
Step-by-step explanation:
24 + 8p = -8(5+ 3p) Original Problem
24 + 8p = -8(5) + -8(3p) Distributive property
24 + 8p = -40 - 24p Simplification
24 + 8p - 24 = -40 - 24p -24 Grouping the constants
8p = -64 - 24p Simplification
8p + 24p = -64 -24p +24p Grouping the variables
32p = -64 Simplification
32p/32 = -64/32 Isolating the variable
p = -2 The Answer!!!!
I hope this helps!!!
(n + 12) x 5 + 7n Need equivalent expression
Answer:
12n + 60
General Formulas and Concepts:
Pre-Algebra
Distributive Property
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
Terms/CoefficientsStep-by-step explanation:
Step 1: Define
(n + 12) × 5 + 7n
Step 2: Simplify
Distribute 5: 5(n) + 5(12) + 7nMultiply: 5n + 60 + 7nCombine like terms: 12n + 60what fractions are greater than 11/20
a- 3/4
b - 3/10
c - 4/5
d - 1/2
Answer:
3/4 and 4/5
I hope this helps :)
A ball is thrown with an initial speed of 17 mph in a direction that makes an angle of 22 degrees with the positive x-axis. Express the velocity vector v in terms of i and j.
Answer:
The speed of the ball in terms of i and j is (15.76 i, 6.37 j)
Step-by-step explanation:
Given;
velocity of the ball, v = 17 mph
angle of inclination, θ = 22⁰
The horizontal component of the velocity is calculated as;
[tex]V_x = Vcos\theta\\\\V_x = 17cos(22)\\\\V_x = 15.76 \ i[/tex]
The vertical component of the velocity is calculated as;
[tex]V_y = Vsin\theta\\\\V_y = 17sin(22)\\\\V_y = 6.37 \ j[/tex]
Therefore, the speed of the ball in terms of i and j is (15.76 i, 6.37 j)