Answer:
1 do the division by a draw of their names into 2 teams
2 there might be one group with a higher age and thus a lower chance of being cured and you should know all variables and have control over the project
Step-by-step explanation:
Answer:
1. There are multiple methods to choosing randomly from a selection. One instance could be choosing names from a hat.
2. Dividing the groups randomly allows for an equal and fair distribution of people for the control and variable groups. The 50 people receiving the drug are the variable group, while the other 50 receiving the placebo are the control group.
Step-by-step explanation:
Random selection is used in testing in order to assure the lack of bias from researchers. In real trials, random selection would likely be done through the company's own software, or an Excel spreadsheet.
Random selection is also used in order to remove lurking variables. An example of a lurking variable could be shown as follows:
A researcher is studying a connection between heart disease and cholesterol intake. Aspects unrelated to the study could still have an effect on the quality of the results, like whether people in the groups smoked or was very stressed. Random distribution assists in removing any lurking variables - and if it can't fully remove them, it will at least distribute them fairly across the control and variable groups.
Please help!
The isosceles triangle below is rotated along the blue dashed line going through the center. Find the volume of the cone formed by doing this rotation. Round your answer to the nearest tenth.
Answer:
47.1
Step-by-step explanation:
Sorry if its wrong
The cone's volume is approximately 47.1 cubic centimeters, obtained by rotating the provided isosceles triangle along its central blue axis.
The volume of a cone is calculated by the following formula:
[tex]$V = \frac{1}{3}\pi r^2 h$[/tex]
where r is the radius of the base and h is the height of the cone.
In this case, the height is simply the height of the triangle, which is 5 cm.
The radius is a bit trickier.
Notice that the blue dashed line bisects the base of the triangle. Therefore, the radius is half the length of the base, which is 6 cm / 2 = 3 cm.
Substituting these values into the formula, we get:
[tex]$V = \frac{1}{3}\pi (3\text{ cm})^2 (5\text{ cm})$[/tex]
[tex]$V = 15\pi \text{ cm}^3$[/tex]
Rounding this to the nearest tenth, we get:
[tex]$V = 47.1 \text{ cm}^3$[/tex]
Therefore, the volume of the cone is approximately 47.1 cubic centimeters.
Manipulate the triangle so angle A measures
approximately 92°
Manipulate the triangle so angle B measures
approximately 51°
Notice the straight line p.
What must the measurement of angle C be for p to
remain a straight line?
Angle C should measure approximately
Answer:
37 Degrees
Step-by-step explanation:
Manipulate the triangle so angle A measures approximately 92°.
Manipulate the triangle so angle B measures approximately 51°.
Notice the straight line p.
What must the measurement of angle C be for p to remain a straight line?
Angle C should measure approximately 37 Degrees
There is angle C should measure approximately 37° for line p to remain a straight line.
What are the vertical angles?When two lines intersect at a location, vertical angles are generated. They are always equal to each other.
As we know that a straight line, the sum of the angles is equal to 180°.
So, when angle A measures approximately 92° and angle B measures approximately 51°,
Then, the measurement of angle C must be 180° - 92° - 51° = 37° in order to keep line p a straight line.
Thus, angle C should measure approximately 37° for line p to remain a straight line.
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Which angel is an alternate exterior angle with angle 4
Answer:
6
Step-by-step explanation:
Alternate exterior is always the opposite side but on the outside. If it starts on the top left, it goes down to the bottom right
Answer:
angle 6
Step-by-step explanation:
angel 6 is an alternate exterior angle with angle 4
check 2 x-1 is a factor of p[x]=x^3-x^2+2x-1
Answer:
Step-by-step explanation:
2x - 1 =0
2x = 1
x = 1/2
Now We have to find P(1/2). If P(1/2) is zero, then 2x - 1 is a factor of P(x)
P(x)= x³ - x² + 2x -1
[tex]P(\frac{1}{2})=[\frac{1}{2}]^{3}-[\frac{1}{2}]^{2}+2*[\frac{1}{2}]-1\\\\=\frac{1}{8}-\frac{1}{4}+1-1\\\\=\frac{1}{8}-\frac{1*2}{4*2}+0\\\\=\frac{1}{8}-\frac{2}{8}\\\\=\frac{1-2}{8}\\\\=\frac{-1}{8}\neq 0[/tex]
2x - 1 is not a factor of p(x)
Emily, a makeup artist, wants to be what artists in the movie business call a key makeup artist. This is how she describes the job.
“A key makeup artist has an important job in the movies. She designs a different look for every actor on the movie set. She must be exceptionally creative and aware of the latest technology.”
Which prepositional phrase in this paragraph modifies an adverb?
A. in the movies
B. for every actor
C. on the movie set
D. of the latest technology
Answer:
The Answer is D
Step-by-step explanation:
None of the prepositional phrases in the paragraph modify an adverb. They either modify a noun or a verb.
Explanation:In understanding this question, a prepositional phrase is a group of words consisting of a preposition, its object, and any words that modify the object. On the other hand, a adverb is a word that modifies a verb, an adjective, or another adverb.
The prepositional phrases in the paragraph include 'in the movies,' 'for every actor,' 'on the movie set,' and 'of the latest technology.'
Examining these closely, it is easy to see that none of these prepositional phrases modify an adverb—they either modify a noun or a verb. Therefore, there are no prepositional phrases in this paragraph that modify an adverb.
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What is the degree of the polynomial below?
5+1 – 34 + 3х9 - 2х
a) 3
b) 9
c) 5
d) 4
Tammy is buying a soft toy from a shop. The cost of the toy is 9 dollars and she also has to pay a sales tax that is 15% of the price of the toy. She wants to know the total cost she will have to pay.
Answer:10.35 dollars
Step-by-step explanation: 15% of 9 dollars is 1.35
so you add 1.35 to 9 dollars to find the total cost
The total cost she will have to pay for the toy is $10.35.
What is the percentage?A percentage is a figure or ratio that can be stated as a fraction of 100. If we need to calculate the percentage of a number, we must divide it by its full value and then multiply it by 100. As a result, the percentage is one part in one hundred. "Per 100" is short for "per percent." It is represented by the symbol "%".
Given the cost of the toy = $9
sale tax on toy = 15% of the total price
sale tax on toy = 15% of 9
sale tax on toy = 0.15 x 9
sale tax on toy = $1.35
total cost to pay = $9 + $1.35
total cost to pay = $10.35
Hence total cost to pay is $10.35.
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Find the length of side x in simplest radical form with a rational denominator.
Answer:
2 sqrt(3) =x
Step-by-step explanation:
Since this is a right triangle we can use trig functions
sin theta = opp side/ hypotenuse
sin 60 = x/4
Multiply each side by 4
4 sin 60 =x
We know sin 60 = sqrt(3)/2
4 sqrt(3)/2 =x
2 sqrt(3) =x
Two math classes are selling raffle tickets to raise money.
• One class is selling tickets for $3.50 each and has already raised $550.
• The other class is selling tickets for $5.00 each and has already raised $250.
Which equation can be used to find t, the number of tickets each class needs to sell so that the total amount raised is the same for both classes?
A) 5.00t + 550 = 3.50t + 250
B) 550t + 3.50 = 250t + 5.00
C) 3.50t + 550 = 5.00t + 250
D) 3.50 + 550 = 5.00t + 250t
Answer:
3.50t + 550 = 5.00 + 250 bc well always remember that each means Multipy!
26. A footbal player punts a ball. The path of the ball can be modeled by the equation y=--0.004x+
- 25 wherex is the horizontal distance, in feet, the ball travels and y is the height, in feet, of the ball.
How far horizontally from the football player will the ball land? Round to the nearest tenth of a foot
Answer:
252.5
Step-by-step explanation:
y = -0.004x^2 + x + 2.5
-0.004x^2 + x + 2.5 = 0
x = 25(5+√26) = 252.5
Let me know fi you need any other help:)
I had this problem on my quiz, I dont know what you mean by + -25 but hope this will help
Adrian cuts a block of wood as shown. What is the volume of the block of wood?
Answer:
432
Step-by-step explanation:
Volume of cuboid:
12 x 4.5 x 5.5 = 297
volume of traingular prism:
(12x5)/2 x 4.5 =135
add them together:
135+297 =432
hope this helps!
So, the required volume of the given wooden block is 432 cubic cm.
The volume of the rectangular and triangular prism:The formula for the volume of the rectangular prism is,
[tex]v=l\times b \times h[/tex]
And the formula for the volume of the triangular prism is,
[tex]v=\frac{1}{2} \times b \times h[/tex]
It is given that,
The volume of the wood is equal to the volume of the rectangular prism and triangular prism.
So, by using the above formula we can write as,
The volume of the wood is,
= volume of the wood is equal to the volume of the rectangular prism + triangular prism.
[tex]=l\times b\times h+\frac{1}{2}\times h\times l\\ =12\times 4.5 \times 5.5 +\frac{1}{2} \times 12\times 4.5 \times 5\\=297+135\\=432 cm^3[/tex]
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4 part diagram. Part A: Earth between and Sun on left and Moon on right. Arrows point from Earth to Sun and Moon, respectively. Part B: Earth with Sun on left and Moon below. Arrows point from Earth to Sun and Moon, respectively. Part C: Moon between Earth and Sun. Arrow points from Earth through Moon to Sun. Part D: Earth with Sun on left and Moon above. Arrows point to Sun and Moon, respectively.
Use the drop-down menus to choose the correct answers
Answer:
Earth sees a full moon in A
Neap tides occur in D and B
Earth sees a third quarter moon in D
Tide levels are highest in A and C
Therefore, the solution to the problem is as follows -
Earth sees a full moon in A.Neap tides occur in D and B.Earth sees a third-quarter moon in D.Tide levels are highest in A and C.Know more about the sun here:
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Steve buys 2 lbs Of grapefruit
Answer:
Well, whats the question the answers 2 pounds i guess
Step-by-step explanation:
there are a total of 10 pigs and ducks in the barn. there are 36 legs in all all each pig has four legs and each duck has two legs , use substitution to solve the linear system of equations and determine how many pigs x and ducks y there are express the solutions as as ordered pairx,y
Answer:
A Farmhouse shelters 10 animals. some are pigs and some are ducks. Altogether there are 36 legs. How many of each animal are there? Answer: 8 pigs and 2 ducks.
1. (A) p + d = 10
2. (B) 4p + 2d = 36
3. Multiply equation (A) with -2; -2p minus -2d = -20
4. When subtracted from equation (B), this gives you.. 2p = 16, pigs = 8
5. Use this 8 to the second equation by substitution.. 2d = 4, ducks = 2
Step-by-step explanation:
How do I solve these two?
Answer:
1.D
2.B
Step-by-step explanation:
For the first one divide see which one is less which is D
For the second one Ive always used the method kcf keep change flip so you keep [tex]\frac{15}{1}[/tex] the change ÷ to multiplication so then flip [tex]\frac{2}{9}[/tex] so the equation would be
[tex]\frac{15}{1}[/tex]x[tex]\frac{9}{2}[/tex] so multiply the 15 by 9 then you get 135 then divide by 2 so thats your answer
What are the correct trigonometric ratios that could be used to determine the length of LN? Check all that apply. Sin(20°)=LN/8. Cos(70°)=8/LN . Tan(70°)=LN/MN . Sin(20°)=8/LN . Cos(70°)= LN/8
Answer:
The 1st one and last one
Step-by-step explanation:
How would you multiply a binomial by a trinomial?
Step-by-step explanation:
Multiply one of them by each of the terms in the other, then distribute. Finally, combine like terms.
(ax + b) (cx² + dx + e)
ax (cx² + dx + e) + b (cx² + dx + e)
acx³ + adx² + aex + bcx² + bdx + be
acx³ + (ad+bc) x² + (ae+bd)x + be
THI VIOS
Lin needs to mix a specific shade of orange paint for the set of the school play.
The color uses 3 parts yellow for every 2 parts red.
Answer:
2/3
Step-by-step explanation:
Each time 2 parts of red is being used, 3 parts of yellow is used. The yellow depends on the red so 2/3.
In RST, X is the midpoint of RS and Y is the midpoint of RT. Given that XY = 3z + 2 and ST = 7z - 1, what is the value of z?
Answer:
Step-by-step explanation:
XY=ST/2
3z+2=(7z-1)/2
2*(3z+2)=7z-1
2*3z+2*2=7z-1
6z+4=7z-1
+1 +1
6z+5=7z
-6z -6z
5=z
The required value of z is 5.
Given that,
In RST, X is the midpoint of RS,
And Y is the midpoint of RT.
XY = 3z + 2 and ST = 7z - 1.
We have to determine,
What is the value of z.
According to the question,
X is the midpoint of RS,
And Y is the midpoint of RT.
Therefore,
[tex]XY = \frac{ST}{2}[/tex]
Putting the value of XY and ST in the equation,
XY = 3z + 2 and ST = 7z - 1.
Then,
[tex]XY = \frac{RS}{2} \\\\3z+ 2 = \frac{7z-1}{2}\\\\2 \times(3z+2) = 7z-1\\\\= 6z+4= 7z-1\\\\6z-7z = -1-4\\\\-z = -5\\\\= z = 5[/tex]
Hence, The required value of z is 5.
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I need to answer number one I will give as many points as I can for the question and I will mark brainiest
Answer:
diagram is below6, 11, 16, 21s[n] = s[n-1] +526, 31, 36Step-by-step explanation:
a) See below for the next diagram in sequence.
__
b) The numbers of straws in each diagram are ...
6, 11, 16, 21, ...
__
c) Each term is 5 more than the previous one, so the recursive rule for the number of straws is ...
s[1] = 6
s[n] = s[n-1] +5
__
d) The next three terms of the sequence are ...
..., 26, 31, 36, ...
How many solutions does the equation −5a + 2 = 7 - 5a have?
Answer:
there are 0 answers.
Step-by-step explanation:
2-7 is not = 0a
how many sides does a rhombicosidodecahedron have
Answer:
It has 120 sides but mark the other guy brainliest
Step-by-step explanation:
Solve the equation for b: -4b + 18 = -6
--------------------------------------------------------
-4b + 18 = -6
Subtract 18 from both sides:
-4b + 18-18=-6-18
Simplify:
-4b= -24
Divide both sides by -4:
-4b/-4 = -24/-4
Simplify:
b=6
Your Answer Is b= 6
plz mark me as brainliest :)
In triangle PQR, what is the triangle Q? Please answer as fast as possible! 100 POINTS!!!
Answer:
105 degrees
Step-by-step explanation:
The sum of the angles in a triangle add up to 180. Although we don't the know the numerical values of the angles, we can create an equation with the given expressions:
<P + <Q + <R = 180
(6x + 5) + (11x - 5) + x = 180
18x = 180
x = 10
Now, plug this value of x into the expression for Q:
<Q = 11x - 5 = 11 * 10 - 5 = 110 - 5 = 105
Thus, the measure of angle Q is 105 degrees.
Hope this helps!
Answer:
105 degrees
Step-by-step explanation:
The angles in a triangle must add to 180 degrees
<Q +<P + <R =180
We know <Q is 11x-5, <P is 6x+5 and <R is x, so we can substitute them in
11x-5+6x+5+x=180
Combine like terms
11x+6x+x +5 -5 =180
18x=180
Divide both sides by 18
x=10
Now we know x, and we can substitute that in to to find <Q
<Q=11x-5
<Q=11(10)-5
<Q=110-5
<Q=105
Which of the following is the best reason that it might be difficult to predict an individual's future health issues?
a Health issues are determined by environmental factors, which are subject to change.
b. Health issues are determined by a complex interaction of environmental and genetic factors, which is
difficult to predict
C. Health issues are determined by genetic inheritance, which is not fully understood.
d Health issues depend on lifestyle choices, which are not always predictable.
Answer:
b
Step-by-step explanation:
Answer:
b.
Step-by-step explanation:
Health issues are determined by a complex interaction of environmental and genetic factors, which is difficult to predict.
Sort the property that characterizes either a trapezoid or a kite
can have congruent diagonals
Trapezoid
Kite
has one pair of opposite, parallel sides
has congruent adjacent sides
has perpendicular diagonals
Trapezoid:
•Can have congruent diagonals. •Has one pair of opposite, parallel sides.
Kites:
•Has congruent adjacent sides.
•Has perpendicular diagonals.
Properties of trapezoid and kite are follows
Trapezoid
Can have congruent diagonalsHas one pair of opposite, parallel sidesKite
Has congruent adjacent sidesHas perpendicular diagonalsWhat is Trapezoid?Trapezoids are quadrilaterals that have two parallel sides and two non-parallel sides.
What is Kite?A kite is a quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other.
Here,
Trapezoid
Can have congruent diagonalsHas one pair of opposite, parallel sidesKite
Has congruent adjacent sidesHas perpendicular diagonalsHence, the properties of trapezoid and kite are follows
Trapezoid
Can have congruent diagonalsHas one pair of opposite, parallel sidesKite
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Describe the shape resulting from the cross section.
A.
parallelogram
C.
rectangle
B.
triangle
D.
circle
Answer:
Is this all of the info?
Step-by-step explanation:
Answer:
i am still confuse plz give more info
Step-by-step explanation:
The graph of r = -3 + 5cos(theta) is symmetric about the __________.
a.
y-axis only
c.
Origin only
b.
x-axis only
d.
No symmetry
Please select the best answer from the choices provided
A
B
C
D
Answer: B
Step-by-step explanation:
X axis only
The graph of r = -3 + 5cosθ is symmetric about the option (B) x axis only
What is Symmetry?In mathematics, symmetry has a more precise definition, and is usually used to refer to an object that is invariant under some transformations; including translation, reflection, rotation or scaling.
What is Graph?A graph is a structure amounting to a set of objects in which some pairs of the objects are in some sense related.
Here,
The graph of r = -3 + 5cosθ is symmetric about the x axis only
Also when we plot the graph we can say that it is symmetric about x axis only.
Hence, the graph of r = -3 + 5cosθ is symmetric about the option (B) x axis only
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Find the unit rate.
10 deliveries in 5 hours = |
deliveries per hour
Answer: 2 deliveries per hour
Step-by-step explanation:
Find the volume of the figure.
A) 288 cm3
B) 480 cm3
C) 544 cm3
D) 640 cm3
Answer:
A) 288 [tex]cm^{3\\}[/tex]
Step-by-step explanation:
The Volume of the figure is 288 cm³.
What is Volume?Volume is a three-dimensional quantity used to calculate a solid shape's capacity. That means that the volume of a closed form determines how much three-dimensional space it can fill.
Given:
Base edges = 4 cm x 4 cm
Height = 1 cm
So, Volume = area of the base x height
For Figure 1:
Volume of figure1
=(4x4)x 10
=160
For Figure 2:
Volume of figure 2
= (8x4) x 4
= 128
Thus, the Total volume = 160+ 128 =288 cm³
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