The null hypothesis is based on the idea that there is no relationship between the variables.
What is null hypothesis?
The null hypothesis is a common statistical theory that contends that there is no statistical relationship or significance between any two sets of observed data and measured phenomena for any given single observed variable. The null hypothesis can be evaluated to determine whether or not there is a relationship between two measured phenomena, which makes it valuable. It can let the user know if the outcomes are the product of random chance or deliberate manipulation of a phenomenon.
The null hypothesis states that there is no relationship between two population parameters, i.e., an independent variable and a dependent variable. Therefore, the null hypothesis is based on the idea that there is no relationship between the variables.
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A bakery sold a total of 300 cupcakes in a day, and 252 of them were chocolate flavored. what percentage of cupcakes sold that day were chocolate flavored?
Answer:
84% of the cupcakes were chocolate- flavored.
Step-by-step explanation:
[tex] \frac{252}{300} = \frac{84}{100} = 84\%[/tex]
Write the expression in simplest form:
The product of 4 and the sum of 10 and a number x.
ILL GIVE BRAINIEST I NEED IT NOW
Answer:
40x
Step-by-step explanation:
4x10x
=
40x
Answer:4x+50?
Step-by-step explanation:
4(10+x)
Simplified into 50+4x
So basically 4x+50
What is the equation of the line that passes through the point (−7,−4) and has an undefined slope?
what is the equation of a line that is parallel to the line y=2x+1 and passes through the point (4,6).
keeping in mind that parallel lines have exactly the same slope, let's check for the slope of the equation above
[tex]y=\stackrel{\stackrel{m}{\downarrow }}{2}x+1\qquad \impliedby \qquad \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}[/tex]
so we're really looking for the equation of a line that has a slope of 2 and it passes thourhg (4 , 6)
[tex](\stackrel{x_1}{4}~,~\stackrel{y_1}{6})\hspace{10em} \stackrel{slope}{m} ~=~ 2 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{6}=\stackrel{m}{ 2}(x-\stackrel{x_1}{4}) \\\\\\ y-6=2x-8\implies {\Large \begin{array}{llll} y=2x-2 \end{array}}[/tex]
solve each compound inequality. drag the correct solution and graph next to the inequality
A compound inequality is created by joining two or more inequalities together using or or and (also known as a combined inequality). For a value to be the answer to an or inequality, it simply needs to make one part of the inequality true. To be effective, a solution to an inequality must make both sides true. Examples are x3 or x>2.
Explain about the compound inequality?
A sentence having two inequality statements connected by the words "or" or "and" is referred to as a compound inequality. The conjunction "and" denotes the simultaneous truth of both statements in the compound sentence. It is when the solution sets for the various statements cross over or intersect.
Divide a compound inequality into two independent ones before attempting to solve it. Choose either a union of sets ("or") and an intersection of sets as the appropriate response ("and"). Then, resolve the graph and all inequalities.
The values that belong to both graphs—where the graphs overlap—are found by first examining the graphs of each individual inequality in order to obtain the answer to a "and" compound inequality. We graph each inequality for the compound inequality x>3 and x2. Next, we search for areas where the graphs "overlap."
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21. Determine the measures of angles x, y, and z.
55⁰
80
100°
60°
For the line and point below, describe how the following equations would differ: A) A parallel line, through the given point B) A perpendicular line, through the given point (-2,1) slope 1
The linear functions would be given as follows:
a) Parallel: y = x + 3.
b) Perpendicular: y = -x - 1.
The equations have different slope and intercept.
What is a linear function?A linear function, in slope-intercept format, is modeled according to the following rule:
y = mx + b
In which the coefficients are described as follows:
The coefficient m is the slope of the function, which is the rate of change of the function, that is, the change in y divided by the change in x.The coefficient b is the y-intercept of the function, which is the the value of y when the function crosses the y-axis(x = 0).For item a, we consider that if two lines are parallel, they have the same slope, hence the line would also have a slope of 1, that is:
y = x + b.
From point (-2,1), we have that when x = -2, y = 1, hence we can solve and find the intercept b as follows:
1 = -2 + b
b = 3.
Hence:
y = x + 3.
For item b, we consider that if two lines are perpendicular, the multiplication of their slopes is of -1, hence:
m = -1.
Then:
y = -x + b.
From the point (-2,1), we can find b as we did above, hence:
1 = -(-2) + b
2 + b = 1
b = -1.
Hence the rule is:
y = -x - 1.
The equations have different slope and intercept, that is, their coefficients are different.
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- (-5v - 4y + 6) use distributive property to remove the parenthesis
Answer:
(5v+4y+6)
Step-by-step explanation:
You have to distribute/multiply the negative sign (-) to all the values inside.
-(-5v-4y+6)=
-(-5v)=5v (-×- = +)
-(-4y)= 4y (-×- = +)
-(6)= -6 (-×+ = -)
The answer is:
(5v+4y+6)
Naomi added three mixed numbers as shown below.
Add: 358+(216+238)
Step 1 =358+(238+216)
Step 2 =(358+238)+216
Step 3 =6+216
Step 4 =816
Which statement best evaluates Naomi’s work?
1. She used the commutative and distributive properties correctly and got the correct answer.
2. She used the commutative and distributive properties correctly and got the correct answer.
3. She used the commutative and associative properties correctly and got the correct answer.
4. She used the commutative and associative properties correctly and got the correct answer.
5. She used the commutative and distributive properties correctly but got an incorrect answer.
6. She used the commutative and distributive properties correctly but got an incorrect answer.
7. She used the commutative and associative properties correctly but got an incorrect answer.
8. She used the commutative and associative properties correctly but got an incorrect answer.
The correct option about Naomi is that dhe used the commutative and associative properties correctly but got an incorrect answer.
What are the properties about?It should be noted that the commutative property states that that order of mathematical operations don't matter. The associative property illustrates that the grouping of numbers such that:
(a + b) + c = a + (b + c)
The steps given are:
Add: 358+(216+238)
Step 1 =358+(238+216)
Step 2 =(358+238)+216
Step 3 =6+216
Step 4 =816
You can see that the step 3 is incorrect as well as the final answer. In this case, (358+238)+216 will be 812.
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Which of the following describes the location of the opposite of the number that R represents on this line? please help someone . Thanks
A) at a distance of 8 tick marks above 0
B) at a distance of 4 tick marks above 0
C) at a distance of 8 tick mark below 0
D) at a distance of 4 tick mark below 0
Answer:
B) at a distance of 4 tick marks above 0
Step-by-step explanation:
The dot represents the number on the line, R, and the opposite of -4 is positive 4, which is 4 tick marks above 0.
Expand The expression -1/4(8r+12y) to write an equivalent expression. Use as few terms as possible.
help mee!!
7|5p−7| = −21
Answer:
p=-1.25
Step-by-step explanation:
first, we do the absolute value so we get 7x5p+7=-21
now we subtract 7 on each side so now it is 7x5p=-28
now we multiply the 7 and 5p so no it is 35p=-28
now we divide both sides by 35 now the answer is p=-1.25
-Name The Slope
-Name The Starting Value
-How many blocks would be in figure 100
A line's slope is a measurement of how steep a line is. Slope is calculated by dividing the change in y values by the change in x values.
In math, what is a slope?A line's steepness can be determined by looking at its slope. Slope is calculated mathematically as "rise over run" (change in y divided by change in x).
Slope is a measure of the steepness of a line.
Slope = rise / run = Δy / Δx.
Slope= Δx /Δy = 4−0 /2−5 = 4 / −3
Slope from two points, for instance
We are informed that there are two possible solutions to a particular linear equation:
Solution: x = 11.4, y = 11.5, x = 11.4, y = 11.5, space, space, space, y = 11.
Answer: x=12.7 y=15.4 x=12.7 y=15.4
Slope=
Δx / Δy = 12.7−11.4 /15.4−11.5
= 1.3 /3.9
= 13 /39
=3.
The line has a 333 slope.
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Base on the scatter diagram, would you estimate the correlation coefficient to be positive, close to zero, or negative? Explain your answer.
Answer:
Positive
Step-by-step explanation:
I would estimate the correlation coefficient to be positive, because the slope is up and to the right, with both the x- and y- values becoming larger and larger which indicates that the correlation is positive.
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Change the same radical and simplify the radicand 3√x³
By using exponent properties, we will see that the simplification is the following:
∛x³ = x
How to simplify the expression?Here we have the algebraic expression:
∛x³
And we want to simplify this, there are two things you need to remember before doing this, these are the exponent properties:
(xᵃ)ᵇ = xᵃ*ᵇ
and:
ⁿ√x = x¹/ⁿ
Then we can rewrite:
[tex]\sqrt[3]{x^3} = (x^3)^{1/3}[/tex]
Using the first property now we can write:
[tex](x^3)^{1/3} = x^{3*1/3} = x^1 = x[/tex]
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Trigonometry question
Given the following function, choose the graph with the two possible angles with the domain 0[tex]\leq[/tex]0[tex]\leq[/tex]360 degrees.
1. sin0 = -2/3
2. sec0 = 2/1
3. tan0 = 4/5
4. csc0 = -3/2
5. cos0 = -3/5
The trigonometric functions sin θ = - 2 / 3 and csc θ = - 3 / 2 are related to each other in accordance with the trigonometric formula: sin θ · csc θ = 1. (Correct choices: 1, 4)
What two trigonometric functions have the same angle?
In this question we must look for two trigonometric functions that are associated to one and same angle. This can be done by relations between fundamental and derivate trigonometric functions. There are two fundamental trigonometric functions (sine, cosine) and four derivate trigonometric functions (tangent, cotangent, secant, cosecant).
After a quick inspection, sin θ = - 2 / 3 is related to csc θ = - 3 / 2 as it fulfill the following trigonometric formula: sin θ · csc θ = 1
RemarkThe graph is missing and cannot be found, so we decided to change the intend of the question to find two trigonometric functions associated with the same angle.
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what are the factors of the quadratic function represented by this graph
The factors of the quadratic function represented by the graph is (x+1) and (x+5)
What is a Quadratic Function?A quadratic Function is an Algebraic equation in which the highest degree of the variable is 2.
Quadratic functions when plotted on graphs appear as curves and which cuts through the X-axis of the graph.
From the graph, the roots of the function are x = -1 and x = -5,
If x = -1 is a root then taking -1 to the left x+1 = 0
Also if x = -5, then X+5 = 0
so since x+5 = 0 or x +1 = 0
Then (x+5)(x+1) = 0 is the required function.
Therefore (x+5)(x+1) are factors of the Quadratic function
In conclusion, the Factors of the Quadratic functions are (x+1)(x+5)
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i neeed help again:( pweaseee help
Answer:
[tex]a) n =\dfrac{c}{d}\\\\\\b) b= 2A -a\\\\c) m_1=\dfrac{Fr^2}{Gm_2}[/tex]
d) z = 10
Step-by-step explanation:
Solve for the given variable:a)
[tex]\sf d = \dfrac{c}{n}\\\\\text{Mulitply the entire equation by 'n',}\\\\n*d=n*\dfrac{c}{n}\\\\nd =c\\\\\text{Now, divide the entire equation by 'd',}\\\\n =\dfrac{c}{d}[/tex]
b)
[tex]\sf A = \dfrac{a+b}{2}\\\\\text{Multiply the entire equation by 2,}\\\\2*A = 2*\dfrac{a+b}{2}\\\\2A = a+b\\\\\text{Now subtract 'a' from both sides,}\\\\2A - a = b\\\\\boxed{b=2A - a}[/tex]
c)
[tex]\sf F =\dfrac{Gm_1m_2}{r^2}[/tex]
Multiply the entire equation by r²,
[tex]\sf Fr^2=r^2*\dfrac{Gm_1m_2}{r^3}\\\\Fr^2=Gm_1m_2[/tex]
Divide the entire equation by Gm₂,
[tex]\sf \dfrac{Fr^2}{Gm_2}=m_1\\\\\boxed{m_1=\dfrac{Fr^2}{Gm_2}}[/tex]
D) A = 7 ; y =4
Substitute in the equation and find the other number.
[tex]\sf A = \dfrac{1}{2}(y+z)\\\\7=\dfrac{1}{2}(4+z)\\\\Multiply \ both \ sides \ by 2,\\\\7*2 = 4 +z[/tex]
14 = 4 + z
Subtract 4 from both sides,
14 - 4 = z
z = 10
How much more will his shirt cost in Fresno than in Bakersfield (in dollars)? (Round each to the nearest cent and write your answer as a decimal). Do Not Put Units.
Using the properties of percentage we get that the shirt cost $0.25 more in Fresno than in Bakersfield.
A percentage is a figure or ratio stated as a fraction of 100 in mathematics.
Although the abbreviations "pct.", "pct.", and occasionally "pc" are also used, the percent symbol, "%," is frequently used to indicate it. A percentage lacks dimensions and has no associated unit of measurement.It is not always obvious from the context what a percentage is in relation to because of inconsistent usage. The typical meaning of a "10% rise" or "10% decline" in a quantity is that this refers to the quantity's starting value. As an illustration, the new price of a $200 item would be $220 if the price increased by 10%, or $20.Price of the shirt is Fresno
= 35 + 8.225% of 35
= 37.87875
≈ 37.88 dollars
Price of the shirt in Bakersfield
= 35 + 7.5% of 35
= 35 + 2.625
= 37.625
≈ 37.63 dollars
Difference in price after adding the sales tax percentage
= 37.88-37.63
= 0.25 dollars
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-7 -3 2/3 write as mixed number
Answer: 3 1/3
Step-by-step explanation:
-7 - (-3 2/3)
-7 = -6 -3/3
-6 -(-3) = -3
-3/3 -(-2/3) = -1/3
-3 + (-1/3) = -3 1/3
|-3 1/3| = 3 1/3
The distance between the two numbers is 3 1/3
4 = -(x + 3) implemented as a real life problem
Which expression is equivalent to (4.3x + 4)(−1.8x)?
The expression which is equivalent to the given expression is -7.74x² - 7.2x.
The given expression is (4.3x + 4)(−1.8x).
What is an equivalent expression?Equivalent expressions are expressions that work the same even though they look different. If two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value for the variable.
Now, the given expression can be solved as follows:
(4.3x + 4)(−1.8x)
Using distributive property
4.3x × (−1.8x) + 4 × (−1.8x)
= -7.74x² - 7.2x
Therefore, the expression which is equivalent to the given expression is -7.74x² - 7.2x.
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Use cubes with the given edge length to find the volume of the rectangular prisim. Check your answer using the volume formula
The volume of the rectangular prism is 27 inch³.
Given that,
We are going to find the volume of the given rectangular figures in the picture.
The volume of a three-dimensional figure is the amount of rectangular units required to completely fill the interior space.
Volume of the rectangular prism is length×width×height.
Volume of a cube is (side length)³.
If we take each cube from a figure u will get the side length as 1 inches.
So, The 1 cube volume is S³
=1³=1 inch³
Now, we take each cube row's.
Each row as 9 cubes
We get the volume as 9 inch³.
Then there are 3 rows in the diagram.
=9+9+9
=27 inch³
Therefore, The volume of the rectangular prism is 27 inch³.
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There are 30 fish in a pond. 9 of the fish are carp.
1/3
Of the fish that are not carp, are sticklebacks and the rest are tench.
What is the ratio of carp to sticklebacks to tench in the pond?
Give your answer in its simplest form.
Answer:
9:7:14
Step-by-step explanation:
where I got my answer
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How are the functions y=x and y=x-3 related? How are their graphs related?
Functions y=x and y=x-3 are related in a way that each output for y=x–3 is 3 units more than the corresponding output for y=x.
Their graphs are related in a way that the graph of y=x–3 is the graph of y=x translated down 3 units
A function will defines one variable in terms of the other. Functions y=x means that y will vary directly to whatever value x takes.
When the graph of function y=x is drawn, then it is a straight line through the origin.
Now, functions y=x and y=x-3 are closely related. The graphs of the two are almost the same, the only difference is that every point on function y=x has been lowered by 3 to be function y=x-3.
Hence, the output for y=x-3 is 3 units more than the output of y=x, and the graph of function y=x is translated down by 3 units to get function y=x-3
The graphs for functions y=x and y=x-3 are shown below:
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Please help me with this question asap the test is about to close in 20 minutes
Number of cubic feet water is passing through dam in 3 second = 4 cubic ft
Therefore, amount of water passes through dam in 1 seconds
= \frac{\text{Amount of water passing through dam}}{\text{Duration}}
Duration
Amount of water passing through dam
= \frac{4}{3}
3
4
cubic feet per seconds
If the volume of a prism is 64, its length 4, and its width 2, what is its height
Answer:
h=8
Step-by-step explanation:
there is a formula for a volume of a prism
Volume = length • width • height
for shortening purposes
V = L • W • H
we know the prism's length is 4, and it's width is 2 and we know it's volume is 64 but the height is missing
what we will do is say (since height is missing)
[tex]h = \frac{V}{l \: • \: w} [/tex]
v = 64
l = 4
w = 2
so, now plug in those values for your variables
[tex]h = \frac{64}{4 \: • \: 2} [/tex]
multiply 4 • 2
[tex]h = \frac{64}{8} [/tex]
divide by 8
[tex]h = \frac{8}{1} [/tex]
simplify
[tex]h = 8[/tex]
Check:V = l•w•h
v= 4 • 2 • 8
v = 8• 8
v = 64
hope this helped happy learning
how do I find which two further transformations will carry rectangle P'Q'R'S back onto rectangle PQRS
Reflection across the x axis involve negating the value of the y axis but the value of the x axis remain the same. Reflection across the y axis negate the x coordinates but the y values remains the same. When you reflect across the line y=x the coordinate and the y coordinates change places. Whe it rotate 180 degree around the origin the x and y values are negated. The transformation is interpreted as follows.
The answer is C which is reflection across the y axis followed by a 180 degree rotation around the origin.
The logic here is that PQRS is first reflected across the x axis which makes the y values negative. Then it reflect across the y axis which makes the value of x negative. So both x and y values are negative at this point. The rotation of 180 degree around the origin negates both the x and y values to make it all positive like the initial values of PQRS.
Find the surface area of the rectangular prism.
8 in
6 in
3 in
Answer: 180
Step-by-step explanation: You first have to find the surface area of each face of the rectangular prism. So, we can multiply 8 and 6 to find the largest face, 8 and 3 to find the second largest face, and 6 and 3 to find the smallest face. We also know that there are two of each face.
8*6=48
8*3=24
6*3=18
Now we can either double everything now or add everything and then double it.
48*2=96
24*2=48
18*2=32
96+48+32=180
or we can do it this way:
48+24+18=90
90*2=180
Mandy bought 3 boxes of cupcakes to share with friends at work. Each box has 6 cupcakes inside.
The letter c stands for the total number of cupcakes. Which equation can you use to find c? Please answer quickly I need it for math. I'll give 20 points.
Answer:
c=3*6
Step-by-step explanation:
c=3 boxes * 6 cupcakes per box
