Look at the picture.
<, > - dotted line
≤, ≥ - solid line
x > a, x ≥ a - to the right of a
x < a, x ≤ a - to the left of a
y > a, y ≥ a - up from a
y < a, y ≤ a - down from a
(Algebraic and graphical modelling)
please hellpp
Ben's ball lands approximately 2.5 seconds after Andrew's ball.
How long after Andrew's does Ben's ball land?Since the value of parameter a is -5 for both balls, the height of each ball follows the equation:
h(t) = -5t² + vt + h0
where;
h(t) is the height of the ball at time t, v is the initial velocity of the ball (in meters per second), and h0 is the initial height of the ball (in meters).Let's assume that Andrew's ball is hit with an initial velocity of v1, and Ben's ball is hit with an initial velocity of v₂. We also know that Ben's ball reaches a maximum height 50% greater than Andrew's, which means that:
h_max2 = 1.5h_max1
At the maximum height, the velocity of the ball is zero, so we can find the time it takes for each ball to reach the maximum height by setting v = 0 in the equation for h(t):
t_max1 = v₁ / (2 x 5)
t_max2 = v₂ / (2 x 5)
Since Ben's ball reaches a maximum height that is 50% greater than Andrew's, we can write:
h_max2 = 1.5h_max1
-5(t_max2)² + v₂t_max2 + h0 = 1.5(-5(t_max1)² + v1 * t_max1 + h0)
Simplifying this equation, we get:
-5(t_max2)² + v₂t_max2 = -7.5(t_max1)² + 1.5v₁t_max1
We also know that Andrew's ball lands after 4 seconds, which means that h(4) = 0:
h(4) = -5(4)² + v1 * 4 = 0
-80 + 4v1 = 0
v1 = 80/4
v1 = 20 m/s
Solving these equations for t_max2 and v2, we get:
t_max1 = v1 / (2 x 5)
t_max1 = 20 / (2 x 5) = 2 s
t_max2 = 1.5 * t_max1 = 3 s
v2 = 1.5 * v1 = 30 m/s
To find the time it takes for Ben's ball to land, we need to find the time t2 when h(t2) = 0.
We can use the equation for h(t) with v = v2, h0 = 0, and solve for t:
-5t² + v₂t = 0
-5t² + 30 = 0
5t² = 30
t² = 30/5
t² = 6
t = √6
t = 2.5 s
Therefore, Ben's ball lands approximately 2.5 seconds after Andrew's ball.
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Write a story problem for the equation 50 ÷ 10.??
Answer: Hayley is hosting a party. She has 50 pieces of candy she wants to give to her 10 friends. How many pieces should each friend get so everyone receives the same amount?
Find the length of the segment indicated. Round your answer to the nearest tenth if necessary.
The length of the segment indicated is 8.
What is congruence?In geometry, two figures or objects are said to be congruent if their shapes and sizes match, or if one is the mirror image of the other.
Here, two right-angled triangles are given. In a right-angled triangle, the sides are the same, and it can be proved by congruence triangle rules.
The two angles are congruent if they are complements of the same angle (also known as congruent angles). Congruent angles are all just angles.
So, the sides' hypotenuse is 8 which is equal to x. So the value of x is 8.
Thus, the length of the segment indicated is 8.
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Determine whether each expression is a polynomial. If it is a polynomial, find the degree and determine whether it is a monomial, binomial, or trinomial. 20.x25y3+4x
The expression [tex]20.x^25y^3+4x[/tex] is a polynomial of degree 25 and it is a binomial.
A polynomial is an expression made up of variables and coefficients, combined using addition, subtraction, and multiplication, with no division by a variable. In this expression, we have two terms, [tex]20.x^25y^3[/tex] and 4x, which are combined using addition.
Since the degree of a term is the sum of the exponents of its variables, the degree of the first term is 25 (the sum of the exponents of x and y), and the degree of the second term is 1 (the exponent of x). Since this is a polynomial with only two terms, it is a binomial.
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are 4 green marbles, 2 white marbles, and 5 brown marbles in a the probability of choosing a green marble and then a brown, if T put the green marble back in the jar? the correct word to fill in the blank. Simple probability is the ity that event occurs.
4/11
The probability of choosing a green marble followed by a brown marble is 4/11. Simple probability is the likelihood that an event occurs, and in this case the likelihood is 4/11. This is calculated by taking the total number of green marbles (4) divided by the total number of marbles in the jar (11).
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what is 0.10 more than .62
Answer: 0.72
Step-by-step explanation:
0.62 + 0.10 = 0.72
How do the factors of a polynomial function relate to the graph of the function?
Hence, we can learn vital information about the behaviour and shape of a polynomial function's graph by scrutinising its factors and other characteristics.
How do the factors of a polynomial relate?A polynomial function's factors include crucial details about the function graph. The factors specifically determine the locations where the graph intersects the x-axis, known as the function's roots or x-intercepts. By setting each factor to zero and calculating the associated value of x, these roots can be discovered.
The behaviour and structure of the graph are also influenced by the degree of the polynomial function, the signs of its leading coefficient, and other coefficients. The number of turning points in the graph, for instance, is determined by the degree of the polynomial function, whereas the concavity or convexity of the graph is determined by the leading coefficient and other coefficients' signs.
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(3 - 2y)^2 . thank you if answer this question.
Answer:
4y^2 - 12y + 9
Step-by-step explanation:
(3-2y)^2 = (3-2y) (3-2y)
Distribute:
3(3) + (3)(-2y) + (-2y)(3) + (-2y)(-2y)
= 9 -6y -6y +4y^2
Combine like terms:
4y^2 -12y + 9
I hope this helps!
Answer:
9 - 12y + 4y²
Step-by-step explanation:
(3 - 2y)²
= (3 - 2y)(3 - 2y)
each term in the second factor is multiplied by each term in the irst factor, that is
3(3 - 2y) - 2y(3 - 2y) ← distribute parenthesis
= 9 - 6y - 6y + 4y² ← collect like terms
= 9 - 12y + 4y²
1. Define the variables you will use in your model. (2 points)
The variables to use in a model depend on the type of model being developed and the problem being addressed. In general, variables are the inputs to a model that are used to predict the outputs or dependent variables.
What are the variables about?In statistical models, the independent variables, also known as predictors or features, are chosen based on their ability to explain the variability in the dependent variable. For example, in a linear regression model, the independent variables may include factors such as age, income, education, and gender, which are thought to be related to the dependent variable, such as the likelihood of purchasing a product.
In machine learning models, the variables may include a wide range of features, such as text, images, or sensor data, that are used to make predictions or classifications. The process of selecting the most relevant features, also known as feature selection, is an important step in developing effective models that can generalize well to new data.
Ultimately, the choice of variables depends on the specific problem being addressed, and may involve a combination of domain expertise, statistical analysis, and machine learning techniques to identify the most important predictors or features.
P.S: An overview was given as your information is incomplete.
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unit rate of 3/4 quart per 1/2 ounce
Answer:
1.5 quarts/ounce
Step-by-step explanation:
I'll assume the question wants to know the simplified conversion factor for quarts and ounces.
((3/4)quart)/((1/2)oz))
Can be rewritten as:
(3/4)/(1/2) (quart/oz)
(3/4)/(1/2) can be written as: (3/4)*(2/1) [Invert the denominator and multiply]
(3/4)*(2/1) = (6/4)
(6/4) = (3/2)
(3/2) [or 1.5] quarts/ounce
he table shows the relationship between the values of x and y. Which of the following equations describes the relationship for the values in the table
The correct equation that describes the relationship in the table is option B, which is y = x2 + 3.
What is an equation?An equation is a mathematical statement that expresses the relationship between two or more variables. Equations are used to solve problems and represent real-world relationships.
To understand why this is the correct equation, it is important to look at the values of x and y in the table. When x increases by one, the value of y increases by the same amount. This indicates that the relationship between x and y is one of direct proportionality, wherein the value of y is directly proportional to the value of x. This can be expressed mathematically as y = kx, where k is a constant.
We can also look at the values of x and y in the table to determine the value of k. When x increases from 2 to 3, the value of y increases from 7 to 17. This means that k = 10. This can be written as y = 10x.
The value of y when x = 0 is 3, which is the constant term. This can be written as y = 10x + 3.
Therefore, the equation that describes the relationship in the table is y = x2 + 3.
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Please show your work.
The length of segment CB in trapezoid CBAD is 11.
What is trapezoid?In a trapezoid, the midsegment is the line segment that joins the midpoints of the two non-parallel sides. In this case, KJ is the midsegment of trapezoid CBAD, which means that it is parallel to both CB and AD, and its length is equal to the average of the lengths of CB and AD.
We are given that;
CB=4x-13
KJ=6x-18
DA=25
we can use the formula for the midsegment of a trapezoid to set up an equation and solve for x:
KJ = (CB + AD) / 2
6x - 18 = (4x - 13 + 25) / 2
6x - 18 = (4x + 12) / 2
6x - 18 = 2x + 6
4x = 24
x = 6
Now that we have found the value of x, we can substitute it back into the expression for CB to find its length:
CB = 4x - 13 = 4(6) - 13 = 11
Therefore, the answer of the given trapezoid will be 11.
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What value of x will make the following equation true?
2(x-9) = 9 / (-1/3)
A -9
B -4.5
C 3
D 7.5
Answer:
B -4.5
Step-by-step explanation:
You want the solution to 2(x -9) = 9/(-1/3).
SimplifySimplifying the equation gives us ...
2x -18 = -27
2x = -9 . . . . . . . add 18
x = -4.5 . . . . . . . divide by 2
The value -4.5 for x will make the equation true.
hi can you guys help with this problem is you don't know don't answer
The constant of proportionality for the relationship between number of laps (x) and minutes swimming (y) is 5x-2y = 0.
What is a Proportionality graph?A proportionality graph, also known as a direct proportionality graph, is a graph that represents the relationship between two variables that are directly proportional to each other.
In a proportionality graph, the x-axis represents the independent variable, while the y-axis represents the dependent variable. When the two variables are directly proportional, the graph will form a straight line passing through the origin (0,0). This means that as the independent variable increases, the dependent variable also increases in proportion to it.
Here we by using the graph the relationship is 5x = 2y
Let x is a number of laps and y is the minutes swimming then the constant of proportionality is 5x-2y = 0.
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Scientists captured, tagged, and released 20 crows as part of a research study. A week later, they counted 250 crows, of which 10 had tags. To the nearest whole number, what is the best estimate for the crow population?
Cameron is at a location with a coordinate of (-3, 2) on a coordinate plane, Neveah is at a location with a coordinate of (2, -3), Jude is at a location with coordinates (2,3) and Jose is at (-2, -3). Who is in quadrant IV?
a) Cameron
b) Neveah
c) Jude
d) Jose
Jose is in the quadrant 4 as his coordinates are (-2, -3).
A coordinate plane is what?The x-axis and y-axis in a coordinate plane stand in for the horizontal and vertical axes, respectively. Using top right as quadrant I, topmost left as quadrant II, bottom left as quadrant III, and bottom right as quadrant IV, the four quadrants are numbered anticlockwise.
The given coordinates are:
Cameron = (-3, 2)
Neveah = (2, -3),
Jude = (2,3) and
Jose is at (-2, -3).
We must find the point whose x-coordinate is positive and y-coordinate is negative in order to know which point is in quadrant IV.
Hence, Jose is in the quadrant 4 as his coordinates are (-2, -3).
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Activity Number of Participants Golfing 3(s-2) Snorkeling s Parasailing s+14 Surfing (1)/(2)(s+5)
The total number of participants in all the activities is represented by the expression 5.5s + 11.
The given information about the number of participants in each activity can be represented in the following table:
ActivityNumber of ParticipantsGolfing3(s-2)Snorkeling s Parasailings+14Surfing(1)/(2)(s+5)
To find the total number of participants in all the activities, we can add the number of participants in each activity:
Total number of participants = 3(s-2) + s + (s+14) + (1)/(2)(s+5)
Simplifying the expression gives:
Total number of participants = 5.5s + 11
Therefore, the total number of participants in all the activities is represented by the expression 5.5s + 11.
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Solve the inequality for x.
-2x-2<8
Answer:
x > 5
Step-by-step explanation:
-2x - 2 < 8
-2x < 10
x > 5
So, the answer is x > 5
HURRY PLEASE
Question 3.
Which of the following rational functions has a horizontal asymptote at y = 2 and vertical asymptotes at x = 3 and x = –4?
y equals x squared over the quantity x squared plus x minus 12 end quantity
y equals x squared over the quantity x squared minus x minus 12 end quantity
y equals 2 times x squared over the quantity x squared plus x minus 12 end quantity
y equals 2 times x squared over the quantity x squared minus x minus 12 end quantity
Step-by-step explanation:
so, let me retype this.
horizontal asymptote : y = 2
that means lim x going to ±infinity f(x) = 2.
vertical asymptotes :
x = 3
x = -4
that means the function must have these 2 points, where the expression leads to a division by 0 or something similar that would make the result undefined.
we got 4 functions :
A) y = x²/(x² + x - 12)
B) y = x²/(x² - x - 12)
C) y = 2x²/(x² + x - 12)
D) y = 2x²/(x² - x - 12)
so, for which ones we have y = 2 as limit when x goes against + or - infinity ?
that would be C and D.
A and B lead to x²/x² = 1 as limit for gigantic numbers.
C and D lead to 2x²/x² = 2 as limit.
remember, when x gets really, really big, the "±x - 12" part becomes irrelevant.
so, we look at C and D.
which one lead to a division by 0 at x = 3 and x = -4 ?
that would be C.
for x = 3
x² + x - 12 = 3² + 3 - 12 = 9 + 3 - 12 = 12 - 12 = 0
for x = -4
x² + x - 12 = (-4)² - 4 - 12 = 16 - 4 - 12 = 12 - 12 = 0
D with x² - x - 12 would have x = -3 and x = 4 as zeroes.
these are different asymptotes than requested.
so, C is the right answer.
Nicolas and Angela like to collect stamps. Nicolas has 48 stamps. This is 2 times 5 less than the number of stamps Angela has.
If Angela has a stamps, which equation can you use to find the number of stamps she has?
Answer:
Step-by-step explanation:
Let's use the variable "a" to represent the number of stamps Angela has.
From the problem, we know that Nicolas has 48 stamps, and that this is 2 times 5 less than the number of stamps Angela has. "2 times 5 less than the number of stamps Angela has" can be written as:
2(a - 5)
So the equation that relates the number of stamps Nicolas and Angela have is:
48 = 2(a - 5)
We can simplify this equation by first distributing the 2:
48 = 2a - 10
Then, we can add 10 to both sides of the equation:
58 = 2a
Finally, we can solve for a by dividing both sides by 2:
a = 29
Therefore, the equation we can use to find the number of stamps Angela has is:
2(a - 5) = 48
or, simplified:
a = 29
Someone help im giving 20 points
Answer:
Step-by-step explanation:
To find the length of the square side lengths and the diameter of the circle, we can divide the perimeter by 4:
79.04/4 = 19.76
This is the diameter of the circle. The radius is half the diameter:
19.76/2 = 9.88
Hope this helps!
Answer: 9.88 cm
Step-by-step explanation:
To find the radius, we need to find half the length of one side of the square.
The perimeter of the square is all the sides of the square added together.
Squares have 4 sides so divide the perimeter by 4 to find the length of 1 side.
79.04 / 4 = 19.76 is the length of one side.
Half of 19.76 is 9.88 so the radius of the circle is 9.88 cm.
Hope this helps!
10 Points if someone gets right
Given the fraction of 1/8
What is the decimal value? What is it's value written as a percent?
Answer: 0.125 and 12.5%
Step-by-step explanation:
To convert any fraction to decimal form, we just need to divide its numerator by the denominator.
Here, the fraction is 1/8 which means we need to perform 1 ÷ 8.
This gives the answer as 0.125. So, 1/8 as a decimal is 0.125
To get its percentage form, you simply multiply the obtained decimal value by 100:
0.125 x 100 = 12.5
determine the volume of a cone having a radius of 3 inches and the height of 12 inches. Use 3.14 and write the correct answer
The solution is, volume of cone is =113.10.
What is volume of cone ?The formula for the volume of a cone is ⅓ r^2h cubic units, where r is the radius of the circular base and h is the height of the cone.
here, given that,
a cone having a radius of 3 inches
and the height of 12 inches.
now, we have to find the volume of the cone having a radius of 3 inches and the height of 12 inches.
we know that,
Volume = ⅓ r²h
now, substituting the values of r = 3 & h = 12, in formula of volume,
we get,
V =1/3 9 * 12
=113.10
Hence, volume of cone is =113.10
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Can someone explain how to graph quadratic functions
Always double-check your graph by entering various x values and ensuring that the associated y values fall along the curve you drew.
what is graph ?A graph is a picture of data that illustrates the connection between two or more factors. A graph in mathematics is typically a two-dimensional coordinate system with a horizontal x-axis and vertical y-axis (vertical). Data points are represented on a graph by points that are drawn with their x- and y-coordinates. The graph can be used to display trends, correlations, and temporal shifts as well as other patterns and connections between the variables. Graphs are used to aid in the interpretation and communication of data in a wide range of disciplines, including mathematics, science, economics, and social studies.
given
Locate the vertex: The vertex of a quadratic function is the lowest or highest spot on the graph. For the x-coordinate of the vertex, use the expression x = -b / (2a), and for the y-coordinate, use y = f(x), where f(x) is the quadratic function.
The places where the graph crosses the x-axis and the y-axis are known as the intercepts. If x = 0, then calculate f to determine the y-intercept (0).
Additional information: Plug a few x values into the function to determine the associated y values. You'll have more data points to display on the graph as a result.
Always double-check your graph by entering various x values and ensuring that the associated y values fall along the curve you drew.
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Y is directly proportional to x. When x=400 and y=10. Calculate the value for y when x=450
[tex]\qquad \qquad \textit{direct proportional variation} \\\\ \textit{\underline{y} varies directly with \underline{x}}\qquad \qquad \stackrel{\textit{constant of variation}}{y=\stackrel{\downarrow }{k}x~\hfill } \\\\ \textit{\underline{x} varies directly with }\underline{z^5}\qquad \qquad \stackrel{\textit{constant of variation}}{x=\stackrel{\downarrow }{k}z^5~\hfill } \\\\[-0.35em] ~\dotfill[/tex]
[tex]\stackrel{\textit{"y" varies directly with "x"}}{y = k(x)}\hspace{5em}\textit{we also know that} \begin{cases} x=400\\ y=10 \end{cases} \\\\\\ 10=k(400)\implies \cfrac{10}{400}=k\implies \cfrac{1}{40}=k\hspace{5em}\boxed{y=\cfrac{1}{40}x} \\\\\\ \textit{when x = 450, what's "y"?}\qquad y=\cfrac{1}{40}(450)\implies y=\cfrac{45}{4}[/tex]
8. Identify the mapping diagram that represents the relation and determine whether the relation is
a function.
(−2, −5), (−1, −3), (−2, 6), (5, 7)}
Answer:
Not a function
Step-by-step explanation:
For this to be a function there can not be 2 of the same x values.
Our points for this are (−2, −5), (−1, −3), (−2, 6), (5, 7)
Your x value is the number on the left side of the point=
When we look at our points we see that -2 is repeating for (-2,-5) and (-2,6)
If we plot these points on a graph and use the vertical line test we see that our line passes thru the 2 points.
So this is not a function
I NEED DRAWING IDEAS
Draw a flower
Draw a cupcake
Draw a butterfly
Draw a tree
Draw a cartoon character
Draw a heart
Draw a cat
Draw a sun
Draw a bird
Draw a landscape
Draw a cloud
Draw a house
Draw a star
Draw a fish
Draw a snowman
Draw a rainbow
Draw a car
Draw a dog
Draw a person
Draw a fruit
Remember, practice makes perfect! So, keep practicing and exploring your creativity.
Answer: sm1 took my answer down but yes draw a cartoon character or something similar to an old school drawing try giving the character a new look something u never drawn before
Step-by-step explanation:
The diagram shows two squares overlapping.
Work out the size of the angle marked z.
The measure of the angle ∠Z will be 88°.
What is geometry?Geometry is the study of two-dimensional and three-dimensional figures such as quadrilaterals, triangles, circles, their sides, and angles. Symmetry is defined as if the object is cut by its centre line the two cut parts should be the mirror image of each other so that we can call them symmetric to each other.
Given that the two angles are (9p + 20)° and (7p + 32 )°. The value of angle z is calculated as,
9p + 20 + 7p + 32 = 180
16p = 180 - 20 - 32
16p = 128
p = 8
The measure of the angle ∠Z will be,
9p + 20 + ∠Z= 180
72 + 20 + ∠Z= 180
∠Z = 180 - 72 - 20
∠Z = 88°
Therefore, the angle ∠Z is 88°.
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The role of child laborers in Africa’s colonial-era diamond mines was the subject of research published in the Journal of Family History (Vol. 35, 2010). One particular mining company lured children to the mines by offering incentives for adult male laborers to relocate their families close to the diamond mine. The success of the incentive program was examined by determining the annual accompaniment rate, i.e., the percentage of wives (or sons or daughters) who accompanied their husbands (or fathers) in relocating to the mine. The accompaniment rates over the years 1939–1947 are shown in the table below.
a. Find the correlation coefficient relating the accompaniment rates for wives and sons. Interpret this value.
Year Wives Sons Daughters
1939 27.2 2.2 16.9
1940 40.1 1.5 15.7
1941 35.7 0.3 12.6
1942 37.8 3.5 22.2
1943 38 5.4 22
1944 38.4 11 24.3
1945 38.7 11.9 17.9
1946 29.8 8.6 17.7
1947 23.8 7.4 22.2
Source: Cleveland, T. "Minors in name only: Child laborers on the diamond mines of the Companhia de Diamantes de Angola (Diamang). 1917-1975." Journal of Family History, Vol. 35, No. 1,2010 (Table 1).
The correlation coefficient relating is 0.76 thath mean the accompaniment rates for wives and sons is the accompaniment rate for wives increases, the accompaniment rate for sons also tends to increase.
To find the correlation coefficient relating the accompaniment rates for wives and sons, we can use the formula:
r = (nΣxy - (Σx)(Σy)) / √[(nΣx^2 - (Σx)^2)(nΣy^2 - (Σy)^2)]
Where:
- r is the correlation coefficient
- n is the number of observations (in this case, 9)
- x and y are the accompaniment rates for wives and sons, respectively
- Σxy is the sum of the products of x and y
- Σx and Σy are the sums of x and y, respectively
- Σx^2 and Σy^2 are the sums of x squared and y squared, respectively
Using the data from the table, we can calculate the following:
Σx = 27.2 + 40.1 + 35.7 + 37.8 + 38 + 38.4 + 38.7 + 29.8 + 23.8 = 309.5
Σy = 2.2 + 1.5 + 0.3 + 3.5 + 5.4 + 11 + 11.9 + 8.6 + 7.4 = 51.8
Σxy = (27.2)(2.2) + (40.1)(1.5) + (35.7)(0.3) + (37.8)(3.5) + (38)(5.4) + (38.4)(11) + (38.7)(11.9) + (29.8)(8.6) + (23.8)(7.4) = 1164.41
Σx^2 = 27.2^2 + 40.1^2 + 35.7^2 + 37.8^2 + 38^2 + 38.4^2 + 38.7^2 + 29.8^2 + 23.8^2 = 11491.89
Σy^2 = 2.2^2 + 1.5^2 + 0.3^2 + 3.5^2 + 5.4^2 + 11^2 + 11.9^2 + 8.6^2 + 7.4^2 = 349.98
Plugging these values into the formula, we get:
r = (9)(1164.41) - (309.5)(51.8) / √[(9)(11491.89) - (309.5)^2][(9)(349.98) - (51.8)^2] = 0.76
This value of r indicates a strong positive correlation between the accompaniment rates for wives and sons. This means that as the accompaniment rate for wives increases, the accompaniment rate for sons also tends to increase.
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Mary simplified the algebraic expression 2/3x + 1/4x as shown below.
Answer:
she added the denominator
Step-by-step explanation:
Answer:
She added the numerators and denominators. This is not correct.
Step-by-step explanation:
[tex]x(\frac{2}{3} +\frac{1}{4} )=x(\frac{8+3}{12} )[/tex]
[tex]=\frac{11}{12} x[/tex]
Hope this helps.