Which statements correctly describe the association between the variables A and B?
Select each correct answer.
no association
nonlinear association
negative association
positive association
linear association
Answers
Answer:
positive association
linear association
Step-by-step explanation:
It is said that two variables A and B are related when the distribution of the values of one of the two variables differs according to the values of the other.
That is, when variable A grows then variable B also grows. This is known as positive correlation
When variable A grows then variable B decreases. This is known as negative correlation.
In the scatter plot you may notice that when variable A increases then variable B also increases, in an approximately linear relationship. Therefore it can be said that there is a positive and linear association.
The answer is the fourth and fifth option.
Related Questions
How is the equation of this circle written in standard form?
x2 + y2 - 6x + 14y = 142
A)
(x - 3)2 + (y + 7)2 = 200
B)
(x+ 3)2 + (y - 7)2 = 200
(x - 6)2 + (y + 14)2 = 142
D)
(x+6)2 + (y- 14)2 = 142
Answers
Answer:
A
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius.
To obtain this form use the method of completing the square.
Given
x² + y² - 6x + 14y = 142
Collect the x and y terms together
x² - 6x + y² + 14y = 142
add (half the coefficient of both x and y terms )² to both sides
x² + 2(- 3)x + 9 + y² + 2(7)y + 49 = 142 + 9 + 49
(x - 3)² + (y + 7)² = 200 → A
What are the solutions of the quadratic equation
4x2 - 30x + 45 = 0
Answers
Answer:
Step-by-step explanation:
note :
the discriminat of each quadratic equation : ax²+bx+c=0 ....(a ≠ 0) is :
Δ = b² -4ac
1 ) Δ > 0 the equation has two reals solutions : x = (-b±√Δ)/2a
2 ) Δ = 0 : one solution : x = -b/2a
3 ) Δ < 0 : no reals solutions
in this exercice : 4x²-30x+45=0
a= 4 b= -30 c=45
Δ = (-30)² - 4(4)(45) = 900 - 720 = 180.......continu
the number line below represents the solution to which inequality?
<--|--|--|--|--|--O--|--|--|--|--|--|--|--|--|-->
__ -6__-4__-2 __0 __2 __4 __6
(Filled circle)
(Arrow pointing left from -2)
F. -2x + 7 > 8
_
G. 7x + 11 < 4
_
H. 6x - 9 < -21
_
J. -3x -15 < -27
_
Answers
The number line represents the solution to the inequality -2x + 7 > 8, and the solution is x < -0.5.
Explanation:The filled circle and the arrow pointing left on the number line indicate that the solution to the inequality is to the left of -2.
The inequality that represents this solution is -2x + 7 > 8.
To solve this inequality, we can subtract 7 from both sides to isolate the x variable.
This gives us -2x > 1. Finally, we divide both sides of the inequality by -2, remembering that when we divide by a negative number, the inequality sign flips.
So, the solution to the inequality is x < -0.5.
Thus, Correct option for the given number line is F. -2x + 7 > 8.
Final answer:
The number line indicates the solution to the inequality H. 6x - 9 < -21, where x < -2, including -2 (since the circle is filled). The solution matches the given number line plot.
Explanation:
The number line given indicates the solution to an inequality that includes all numbers to the left of – the filled circle on –2, which means –2 is included in the solution set. This represents an inequality that is of the form x ≤ a where a is –2 in this case. Now let's analyze each of the provided inequalities.
F. -2x + 7 > 8: Solving this we get –x > 1 or x < –1, which does not match the plot.
G. 7x + 11 < 4: Solving this inequality we get x < –1, which also is not a match.
H. 6x - 9 < -21: Resolving this inequality leads to x < –2, which matches the number line.
J. -3x - 15 < -27: Solving this we get x > 4, which is incorrect as per the number line plot.
Therefore, the correct inequality is H. 6x - 9 < -21.
Cylinder A has a radius of 1 m and a height of 4 m. Cylinder B has a radius of 2 m and a height of 4 m. What is the ratio of the volume of cylinder A to the volume of cylinder B?
a: 5:6
b: 1:4
c: 1:2
d: 1:1
Answers
Note: The volume of a cylinder is:
radius² × π × height
First lets work out the volume of Cylinder A:
Volume = 1² × π × 4
= 4π m³
Now lets work out the volume of Cylinder B
Volume = 2² × π × 4
= 16π m³
__________________________________________
Now lets compare the volumes ( Cylinder A : Cylinder B) :
4π : 16π
Lets simplify this by dividing both sides by 4π:
4π : 16π ( ÷ 4π)
----> 1 : 4
_____________________________________________________
Answer:
Option b) 1 : 4
Answer:
1:4
Step-by-step explanation:
what is the value of y
Answers
Answer:
B y=54 degrees
Step-by-step explanation:
Since a triangle's angles always add up to 180.
180-72=108
108/2=54
It must be divided by two because y is two angles not one.
Reginald is distributing n boxes of paper to the copy rooms in an office building. If he places 6 boxes of paper in each copy room, there are 7 boxes left over. In order to place 7 boxes of paper in each room, he will need 2 more boxes. How many copy rooms are in the office building?
Answers
Answer:
The total number of copy rooms in the building is 9.
Step-by-step explanation:
With the given information we can compute the total number of copy rooms (let's call them r) and the boxes of paper Reginald has to distribute among them (already named n).
From the first arrangement we can see that if reginald gives 6 boxes of paper to each room, he will still have 7 boxes. We can write this as:
[tex]n = 6 \cdot r + 7[/tex]
From the second arrangement we can see that if reginald gives 7 boxes of paper to each room, he would still need 2 boxes. We can write this as:
[tex]n = 7 \cdot r - 2[/tex]
From the above, we have a 2x2 system of equations, which can be solved by any method. In this case, we can use equalization to easily find the number of rooms. From the 2 relations we can write:
[tex]6 \cdot r + 7 = 7 \cdot r - 2[/tex]
Puting known and unknowns on opposite sides, we get:
[tex]7+2 = (7-6) \cdot r [/tex]
Solving we get:
[tex]9 = r[/tex]
Therefor the total number of rooms is 9.
Pluging this solution into any of the 2 equations, we can obtain that the number of boxes of paper is 61.
As a reference, the following link is useful:
https://en.wikipedia.org/wiki/System_of_linear_equations
The number of boxes of paper exists at 61.
How to find the copy rooms in the office building?The whole number of copy rooms as r and the boxes of paper Reginald has to distribute among them (already named [tex]$\mathbf{n}$[/tex] ).
Reginald gives 6 boxes of paper to each room, he will always have 7 boxes. We can write this as:
[tex]$n=6 \cdot r+7$$[/tex]
Reginald shows 7 boxes of paper to each room, he would always require 2 boxes. We can write this as:
[tex]$n=7 \cdot r-2$$[/tex]
From the above equation, we have a [tex]$2 \times 2$[/tex] system of equations, which can be solved in any form. In this issue, we can utilize equalization to easily find the number of rooms.
From the 2 relations we can write:
[tex]$6 \cdot r+7=7 \cdot r-2$[/tex]
Putting known and unknowns on opposite sides, we get:
[tex]$7+2=(7-6) \cdot r$$[/tex]
Solving we get:
[tex]$9=r$$[/tex]
Thus the total number of rooms exists at 9.
Plugging this solution into any of the 2 equations, then we get
The number of boxes of paper exists at 61.
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Find the product.
(n 3)2 · (n 5)4
Answers
For this case we must find the product of the following expression:
[tex](n ^ 3) ^ 2 * (n ^ 5) ^ 4[/tex]
By definition of power properties we have to:
[tex](a ^ n) ^ m = a ^ {n * m}[/tex]
Rewriting the expression we have:
[tex]n ^ 6 * n ^ {20} =[/tex]
By definition of multiplication of powers of the same base, we put the same base and add the exponents:
[tex]n^{6 + 20} =\\n^{26}[/tex]
Answer:
[tex]n^{26}[/tex]
Answer:
n^26
Step-by-step explanation:
For f (x) = 3x +1 and g(x) = x^2-6, find (g/f)(x)
Answers
Answer:
[tex](g/f) (x) =\frac{x^2-6}{3x+1}[/tex]
Step-by-step explanation:
We have the following functions
[tex]f (x) = 3x+1[/tex]
[tex]g (x) = x^2-6[/tex]
To find [tex](g/f)(x)[/tex] we must divide the function g(x) with the function f(x)
Then we perform the following operation
[tex](g/f) (x) =\frac{x^2-6}{3x+1}[/tex]
Finally we have that:
[tex](g/f) (x) =\frac{x^2-6}{3x+1}[/tex]
For [tex]x \neq -\frac{1}{3}[/tex]
Which statement is false ?
Answers
Answer:
B
Step-by-step explanation:
tell whether the graph of the equation is a horizontal or a vertical line. Explain your choice.
y=-1
Answers
Answer:
horizontal line
Step-by-step explanation:
The equation of a horizontal line parallel to the x- axis is
y = c
where c is the value of the y- coordinates the line passes through.
The equation of a vertical line parallel to the y- axis is
x = c
where c is the value of the x- coordinates the line passes through.
Hence
y = - 1 is a horizontal line passing through all points with a y- coordinate - 1
Please help me out brainiest and 30 points
Match each of the four lines with a line that is perpendicular to it.
Choices to pair with the equations are
y=74x+2
y=−65x+1
y=−74x+9
y=−56x−5
y=65x−5
y=−47x+2
y=47x+9
y=56x+1
Answers
Answer:
y = (5/6)x - 7
is with
y = - (6/5)x + 1
y = - (5/6)x - 8
is with
y = (6/5)x - 5
y = - (7/4)x - 1
is with
y = (4/7)x + 9
y = (7/4)x - 2
is with
y = - (4/7)x + 2
Step-by-step explanation:
You can double check by dividing -1 by the number before x. The answer from that calculation will be the number before the x of the perpendicular line's equation
pair with their perpendicular equations are
y = (5/6)x - 7y = - (6/5)x + 1
y = - (5/6)x - 8y = (6/5)x - 5
y = - (7/4)x - 1y = (4/7)x + 9
y = (7/4)x - 2y = - (4/7)x + 2
What is condition of perpendicular line?The given line is perpendicular to the required line under the condition of perpendicular lines m1×m2=–1.
As, m1*m2=-1
m1= -1/m2
For first equation
y = (5/6)x - 7
m1= 5/6
So, m2= -1/m2= -6/5
Hence, the equation of perpendicular line is y = - (6/5)x + 1.
Similarly,
y = (5/6)x - 7
m1= 5/6
So, m2= -1/m2= -6/5
Hence, the equation of perpendicular line is y = (6/5)x - 5.
again,
y = - (7/4)x - 1
m1=-7/4
So, m2= -1/m2= 7/4
Hence, the equation of perpendicular line is y = (4/7)x + 9
again,
y = (7/4)x - 2
m1= 7/4
So, m2= -1/m2= -4/7
Hence, the equation of perpendicular line is y = - (4/7)x + 2.
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The equation 3x2 = 6x - 9 has two real solutions
True
False
Answers
Answer: FALSE
Step-by-step explanation:
The first step is to rewrite the equation in the form [tex]ax^2+bx+c=0[/tex], then:
[tex]3x^2 = 6x - 9\\3x^2-6x +9=0[/tex]
Now, we need to calculate the Discriminant with this formula:
[tex]D=b^2-4ac[/tex]
We can identify in the given equation that:
[tex]a=3\\b=-6\\c=9[/tex]
Then, we only need to substitute these values into the formula:
[tex]D=(-6)^2-4(3)(9)[/tex]
[tex]D=-72[/tex]
Since [tex]D<0[/tex] then the equation has no real solutions.
Ghlj and gstu are both parallelograms why is angle L= angle T
Answers
Answer: By the parallelogram angle theorem, opposite angles of a parallelogram are congruent. Therefore, angle T must be congruent to angle G, and angle G must be congruent to angle L. By the transitive property of congruence, angle T is congruent to angle L.
Step-by-step explanation: This is the sample response on Edge.
Both parallelograms are <L ≅ < T
Because, by the parallelogram angle theorem, opposite angles of a parallelogram are congruent.
Given parallelograms, GHLJ and GSTU such the parallelogram GSTU is inscribed inside parallelogram GHLJ with angle G coinciding on the two parallelograms.
Therefore, angle T must be congruent to angle G, and angle G must be congruent to angle L. By the transitive property of congruence, angle T is congruent to angle L.
Therefore, ∠L ≅ ∠T
The parallelogramA parallelogram is a two-dimensional geometrical shape, whose sides are parallel to each other. It is a type of polygon having four sides (also called quadrilateral), where the pair of parallel sides are equal in length. The Sum of adjacent angles of a parallelogram is equal to 180 degrees.
Parallelograms are shapes that have four sides with two pairs of sides that are parallel. The four shapes that meet the requirements of a parallelogram are square, rectangle, rhombus, and rhomboid.
Four types of parallelogramsRectangles, rhombus, and squares are parallelograms. A trapezoid has at least one pair of parallel sides. The parallel sides are called the bases and the non-parallel sides are called the legs. There are three types of trapezoid - isosceles, right-angled, and scalene trapezoids.
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blank CDs come in spindles of 25 or 60. Rachel needs 230 blank CDs for her eighth grade science class. how many spindles of each amount should she buy?
Answers
The answer is:
She needs to buy 3 spindles of 60 CDS and 2 spindles of 25 CDs.
Why?We know that the possibilities will depend always on how many CDs contain each type of spindles.
There is only one possible combination of spindles that can give the exact amount of CDs needed.
Let's try to find the combinations:
- First combination: With 1 spindle of 60 CDs:
[tex]Spindles_{25}=\frac{TotalCDs-NoOfSpindles_{60}}{25} \\\\Spindles_{25}=\frac{230-60}{25}=\frac{170}{25}=6.8Spindles[/tex]
Since the result is not a whole number, we know that the first combination does not work.
- Second combination: With 2 spindles of 60 CDs:
[tex]Spindles_{25}=\frac{TotalCDs-NoOfSpindles_{60}}{25} \\\\Spindles_{25}=\frac{230-(2)*60}{25}=\frac{110}{25}=4.4Spindles[/tex]
Since the result is not a whole number, we know that the second combination does not work.
- Third combination: With 3 spindles of 60 CDs:
[tex]Spindles_{25}=\frac{TotalCDs-NoOfSpindles_{60}}{25} \\\\Spindles_{25}=\frac{230-(3)*60}{25}=\frac{230-180}=\frac{50}{25}=2Spindles[/tex]
Since the result is a whole number, we know that the third combination works.
Hence, the combination will be:
[tex]TotalCDs=3Spindles_{60}+2Spindles_{25}=3*60+2*25=180+50=230[/tex]
She needs to buy 3 spindles of 60 CDs and 2 spindles of 25 CDs.
Have a nice day!
Answer:2 of 25 cds 3 of 60 cds
Step-by-step explanation:
1. 3x60=180
2.2×25=50
3. So for science class she needs quality 2 of 25
4. Quality of 3 of 60
So there u go
vertical angles must check all that apply
Answers
Answer:
Vertical angles must have the same vertex and be congruent as well.
Step-by-step explanation:
Answer:
Correct answer is B and C.
Step-by-step explanation:
Vertical angles are those angles opposite each other when two lines intersect. So, they have the same vertex.
When two lines intercept form 4 angles. Those that are opposite to each other are vertical angles, these angles are always congruent.
more questions for 10 points
Answers
To find the midpoint, add the two X values together and divide that by 2 and then add the two Y values together and divide by 2.
X = 8 +3 = 11 /2 = 5.5
Y = 5 +7 = 12 /2 = 6
Depending on how you need to answer the midpoint for X could stay the fraction 11/2, or you can divide it and get 5.5
The midpoint is (11/2,6) or (5.5,6)
Answer:
nope
Step-by-step explanation:
RACTICL
n set
1. How much interest is earned in 9 months on a deposit of
$7000 at 8 percent simple interest?
Answers
Answer:
$420
Step-by-step explanation:
Principal = $7000
Rate = 8%
Time = 9 months
9 months = 3/4 or 0.75 of a year
Simple Interest = Principal * Rate * Time ÷ 100
= $7000 * 8% * 0.75 ÷ 100
= $420
Following Quotient expression
Answers
Answer:
Second choice
and the last 2 choices
Step-by-step explanation:
32m/16m=2 and our constant is 3 not 2 so not choice A
4m^2/2m=2m so possible 6m/2m=3 so choice B
4m/2m=2 and our constant is 3 not 2 so not choice C
10m/5m=2 same reason as A and C
10m^2/5m=2m possible...15m/5m=3 so choice E
32m^2/16m=2m and 48m/16m=3 so this last choice too
Given the following functions f(x) and g(x), solve f over g (−5) and select the correct answer below:
f(x) = 2x − 20
g(x) = x − 1
−5
5
one sixth
30
Answers
=====================================================
Plug x = -5 into f(x)
f(x) = 2x-20
f(-5) = 2(-5) - 20
f(-5) = -10-20
f(-5) = -30
Then plug x = -5 into g(x)
g(x) = x-1
g(-5) = -5-1
g(-5) = -6
Divide the two results
(f/g)(-5) = f(-5)/g(-5)
(f/g)(-5) = (-30)/(-6)
(f/g)(-5) = -5
For this case we have the following functions:
[tex]f (x) = 2x-20\\g (x) = x-1[/tex]
We must find [tex]\frac {f (-5)} {g (-5)}[/tex], then:
We have in mind that:
[tex]+ * - = -[/tex]
Equal signs are added and the same sign is placed.
[tex]\frac {f (-5)} {g (-5)} = \frac {2 (-5) -20} {- 5-1} = \frac {-10-20} {- 6} = \frac {-30} {- 6} = 5[/tex]
Answer:
5
While flying at an altitude of 1.5 km, a plane measures angles or depression to opposite ends of a large crater, shown in the image below. Find the width of the crater
Answers
Check the picture below.
notice the alternate interior angles in the picture.
[tex]\bf tan(68^o)=\cfrac{\stackrel{opposite}{1.5}}{\stackrel{adjacent}{x}}\implies x=\cfrac{1.5}{tan(68^o)}\implies x\approx 0.61 \\\\[-0.35em] ~\dotfill\\\\ tan(56^o)=\cfrac{\stackrel{opposite}{1.5}}{\stackrel{adjacent}{w}}\implies w=\cfrac{1.5}{tan(56^o)}\implies w\approx 1.01 \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{\textit{width of the crater}}{x+w\implies 1.62}~\hfill[/tex]
The width of the crater is 1.61 km.
Given that:Plane is flying at altitude of 1.5 km
The angle of depressions to point A = 68 degrees/
The angle of depression to point B = 56 degrees.
Calculations:In the given diagram below, we can see:
Angle XPD is right angle and thus we have:
[tex]\angle APD + \angle APX = 90\\\angle APD = 180 - \angle APX = 90 - 68 = 22^\circ[/tex]
Similarly, Angle YPD is right angle and thus:
[tex]\angle DPB + \angle BPY = 90\\\angle DPB = 90 - \angle BPY = 90 - 56 = 34^\circ[/tex]
Since the triangle ADP and triangle PDB are right angled triangles, thus we have by trigonometric ratios:
[tex]tan(22) = \dfrac{AD}{PD}\\\\0.404 \times 1.5 = AD\\\\AD = 0.606\: \rm km[/tex]
Similarly,
[tex]tan(34) = \dfrac{BD}{PD}\\\\0.674 \times 1.5 = BD\\\\BD = 1.01 \: \rm km[/tex]
The width of the crater = AD + DB = 1.01 km + 0.606 km = 1.61 km
Thus, width of the crater is 1.61 km.
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Create a dot plot for the data in the table. Hover over each number on the number line. Then click
and drag up to create the dots.
Answers
To create a dot plot, you draw a number line from the smallest to the largest value in your dataset. Then, for each number in the dataset, mark a dot above the corresponding number on the line. If a number occurs more than once, stack the dots.
Explanation:Creating a dot plot for a set of data on a number line involves the following steps:
identify the lowest and the highest values in your dataset. These values will define the extents of your number line.Create the number line starting from the smallest value to the largest value.For each number in the dataset, place a dot above the corresponding number on the number line. If a number occurs more than once, you stack the dots vertically.Unfortunately, as this is a text-based platform, it's impossible to hover over the numbers and drag to create a dot plot interactively. This instruction seems to be meant for a specific interactive software or online tool.
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The function relating the height of an object off the ground to the time spent falling is a quadratic relationship. Travis drops a tennis ball from the top of an office building 90 meters tall. Three seconds later, the ball lands on the ground. After 2 seconds, how far is the ball off the ground? 30 meters 40 meters 50 meters 60 meters
Answers
Answer:
Answer is 50 meters
Step-by-step explanation:
Solution:
Height of the building (h)= 90 meters.
Time taken by the ball to reach the ground (t) = 3 seconds
According to the statement;
h = kt²
90=k(3)²
90=k(9)
90=9k
Divide both the sides by 9
k=10
h=kt²
Put the value time (t)=2 in the equation
h=10(2)²
h=10(4)
h=40 meters
Distance from the ground = 90 - 40
=50 meters.
Thus the correct option is 50 meters....
Answer:
The answer is A) 50 meters
Step-by-step explanation:
Someone please help
Answers
Answer:
[tex]\large\boxed{6\sqrt[5]{x^2y}=6x^\frac{2}{5}y^\frac{1}{5}}[/tex]
Step-by-step explanation:
[tex]\sqrt[n]{a^m}=a^\frac{m}{n}\\\\6\sqrt[5]{x^2y}=(6)(\sqrt[5]{x^2})(\sqrt[5]{y})=6x^\frac{2}{5}y^\frac{1}{5}[/tex]
The sum of a number and two is equal to eight
Answers
Answer:
I'm pretty sure if you subtract 2 from eight you will find the answer of 6 i'm not sure if that question was implying this answer but I hope this helps
Step-by-step explanation:
A window is being replaced with tinted glass. The plan below shows the design of the window. Each unit length represents 1 foot. The glass costs $26 per square foot. How much will it cost to replace the glass? Use 3.14 for π.
g790432
The cost to replace the glass of the window is $
Answers
Answer:
Step-by-step explanation:
Okay first if each unit length is 1 ft then you need to find out what the total cost would be. Then use 3.14 and find the total area of £
cube root of b to the 27 power
Answers
[tex]\sqrt[3]{b^{27}}=\sqrt[3]{(b^9)^3}=b^9[/tex]
HI PLS HELP ITS DUE AT 12 AND ITS 11:45 WILL MARK BRAINLIEST
Answers
Answer:
Answer = 3.14 * 40 = 125.6m^2
Step-by-step explanation:
Let R be the greater radius and r be the smaller radius
A) Area of the sidewalk = \pi R^2 - \pi r^2 - This can be the expression
B) pi = 3.14
= pi (R^2-r^2)
= pi (11^2-9^2)
= pi (121-81)
= pi *40
That was the simplified expression
Answer = 3.14 * 40 = 125.6m^2
HELP PLEASE!!!!!!!!!!!!!!!!! WILL GIVE BRAINLIEST!!! 6TH GRADE MATH
Which of the sets of ordered pairs represents a function?
A = {(–5, 5), (–2, 2), (2, –2), (5, –5)}
B = {(4, 2), (3, –2), (9, 4), (11, –3)} (4 points)
Only A
Only B
Both A and B
Neither A nor B
Answers
Answer:
The answer is both a and b
Answer:
both a and b is correct
what is the multiplicative rate of change for the exponential function graphed to the left
Answers
Looking at the given points on the right side from (0,2) to (1,6) for 1 increase in X ( 1-0=1) the Y value increases by 3 ( 6/2 = 3)
This same increase happens for th other two points: 18/6 = 3
54 / 18 = 3
The rate of increase is 3.
What is the domain of the relation graphed below?
A. domain:{-5, -4,-3, -2,0, 1, 2, 3, 4, 5}
B. domain:{-3, -2,0, 1,4}
C. domain:{-5, -4,-3, 1, 2,5)
D. domain:{(-5, 0), (-4, 1), (-3, 4), (1, -2), (2, 4), (5, -3)}
Answers
Answer:
C. (-5,-4,-3,1,2,5) From the graph we can see the following points first come x-axis and Y-axis like (x, y). From graph we can see 6 points they are (-5,6),(-4,1),(-3,4),(2,4),(1,-2),(5,-3) Here the first no. is the domain like in (-5,6). -5 is domain and 6 is range so all the first no. of the points is in option C so it is the domain.