Answer:
-9
Step-by-step explanation:
A study was conducted to determine if the salaries of the professors from two neighbouring universities were
equal. A sample of 20 professors from each university was randomly selected. The mean from the first university
was $109,100 with a population standard deviation of $2300. The mean from the second university was $110,500
with a population standard deviation of $2100. Assume that the distribution of professor salaries, at both
universities, are approximately normally distributed. Level of significance = 0.05.
Use the four-step P-value approach and test the claim that the salaries from both universities are equal.
Answer:
After calculating values from test statics we come to know that value of if null hypothesis is true then it will rejected
As critical values of z is ±1.96 after apply the test statics formula , we get the value of z that is - 4.50 As we consider the equation that
H₀ > z
Apply test statistic we fine the true value . So there is sufficient evidence to reject the claim.
Step-by-step explanation:
critical values z₀ = ±1.96; standardized test statistic z ≅ -4.50;
reject H₀
There is sufficient evidence to reject the claim.
Marco purchased a large box of comic books for $300. He gave 15 of the comic books to his brother and then sold the rest on an internet website for $330 making a profit , making a profit of $1.50 on each one.how many comic books were in the box? what was the original price of each comic book (assuming they all cost the same amount)?
Answer: There are 75 books.
Price of each book = $4.
Step-by-step explanation:
Let x = Number of books in the box.
Then as per given,
Cost of x books = $300
Cost of one book = \(\$(\dfrac{300}x)\)
Books left after giving 15 of them = x-15
Selling price of (x-15) books= $330
Selling price of one book = \(\$(\dfrac{330}{x-15})\)
Profit on each book= $1.50
Profit = selling price - cost price
\(\Rightarrow 1.50=\dfrac{330}{x-15}-\dfrac{300}{x}\\\\\Rightarrow\ 1.50=\dfrac{330(x)-300(x-15)}{x(x-15)}\\\\\Rightarrow\ 1.50=\dfrac{330x-300x+4500}{x^2-15x}\\\\\Rightarrow\ 1.50(x^2-15x)=30x+4500\\\\\Rightarrow\ 1.50x^2-22.5x=30x+4500\\\\\Rightarrow\ 1.50x^2-52.5x-4500=0\\\\\Rightarrow\ 1.50x^2-52.5x-4500=0\\\\\Rightarrow\ x^2-25x-3000=0\ \ [\text{divide by 1.5}]\)
\(\Rightarrow (x+40)(x-75)=0\\\\\Rightarrow\ x=-40,75\)
Number of books cannot be negative.
So, there are 75 books.
Price of each book = \(\dfrac{300}{75}=\$4\)
So price of each book = $4.
A telephone pole is 24 feet tall. Curtis, who is standing some distance away from the telephone pole measures the angle of elevation to the top of the pole as 51.4 degrees. How far away from the base of the telephone pole is Curtis standing if Curtis's eye height is 5.2 feet?
The distance from the base of the telephone pole to Curtis is about 15 feet.
What is an equation?An equation is an expression that shows the relationship between two or more number and variables.
Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.
Let d represent the distance from the base of the telephone pole to Curtis, hence:
tan(51.4) = (24 - 5.2) / d
d = 15 feet
The distance from the base of the telephone pole to Curtis is about 15 feet.
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Solving an Equation Using Algebra Tiles
Arrange the tiles on both boards to find the value of x.
What is the value for x when solving the equation
-x+ (-1) = 3x + (-5) using algebra tiles?
O x= -1
O x= 1
OX= 2
O x=3
Board sum: (-x) + (-1) = 3x + (-5)
Reset
The tiles are ready for moving
Done
Intro
Answer:
\(\boxed{ \ x = 1 \ }\)
Step-by-step explanation:
hi,
-x+(-1)=3x+(-5)
<=>
-x-1=3x-5
<=>
3x+x = -1+5 = 4
<=>
4x=4
<=>
x=1
thanks
The value of x when solving the equation -x+ (-1) = 3x + (-5) is 1
Algebraic expression:Algebraic expression is a union of terms by the operations such as addition, subtraction, multiplication, division, etc
-x + (-1) = 3x + (-5)
The value of x can be found as follows:
-x + (-1) = 3x + (-5)
Let's open the parenthesis, Therefore,
-x - 1 = 3x - 5
-x - 3x = -5 + 1
-4x = -4
divide both sides by -4
-4x / -4 = -4 / -4
x = 1
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Triple the sum of x and five amounts to the product of two and x.
Answer: 15
Step-by-step explanation:
3(x+5)=2x
3x+15=2x
15=x
A sequence can be generated by using an= 3an-1, where a1 = 10 and n is a whole number greater than 1.
What are the first 3 terms in the sequence?
A. 3, 13, 23
B. 10, 30, 90
C. 10, 13, 16
D. 3, 30, 300
Answer:
B
Step-by-step explanation:
using the recursive rule \(a_{n}\) = 3\(a_{n-1}\) and a₁ = 10, then
a₁ = 10
a₂ = 3a₁ = 3 × 10 = 30
a₃ = 3a₂ = 3 × 30 = 90
the first 3 terms are 10 , 30 , 90
Question Write an equation of the line passing through the point A(0, 3) that is perpendicular to the line y = −1/2x−6
Answer:
The equation would be y=2x+3 I am pretty sure
Step-by-step explanation:
This is because you take the slope which is 2 from the line y=-1/2x-6. To find the slope perpendicular to the line, you need to find the exact opposite of the slope: -1/2, and in this case, it would be 2.
(Ex: if it was -3/4, you would need to use a slope of 4/3 since it is the opposite)
Then you take that slope (2) and the point (0, 3) and put it into "y-y1=m(x-x1)"
y-y1=m(x-x1)
y-3=2(x-0)
-distribute the 2-
y-3=2x-0
-add 3 on both sides-
so equation would be y=2x+3
Not sure if this is all correct, but I hope it helps! :)
The table shows how many children and adults prefer each of two different fruits. How would you find the joint relative frequency of being an adult who prefers watermelon?%0D%0A%0D%0AWatermelon%09Grapes%09Total%0D%0AChild%09132%0985%09217%0D%0AAdult%09111%09117%09228%0D%0ATotal%09243%09202%09445%0D%0A%0D%0AA.%0D%0ADivide 111 by 228.%0D%0A%0D%0AB.%0D%0ADivide 111 by 243.%0D%0A%0D%0AC.%0D%0ADivide 111 by 445.%0D%0A%0D%0AD.%0D%0ADivide 243 by 445.
The joint relative frequency is calculated by dividing the frequency of a specific subset (in this case, the number of adults who prefer watermelon) by the total number of data points.
Here, the specific subset is adults who prefer watermelon, which is 111. The total number of data points is the sum of all children and adults, regardless of fruit preference, which is 445.
So, to find the joint relative frequency of being an adult who prefers watermelon, you would divide 111 by 445.
Hence, the correct answer is:
C. Divide 111 by 445.
A cat has 24 whiskers by its nose.
A manatee has 25 times as many whiskers.
How many whiskers does a manatee have?
Answer:
600 whiskers
Step-by-step explanation:
If you multiply 24 by 25 you get 600
Y=mx+b x=-8y=-5 m=-1/4 solve for b
Answer:
-7=b
Step-by-step explanation:
In the picture.
Bye!
Rubina Shaw, family plan.
HMO annual premium is $11,473.
Employer pays 73 percent.
Emplοyee's annual cοntributiοn: $3,097.71
Emplοyee's mοnthly deductiοn: $258.14
What is an algebraic expression?An algebraic expressiοn is a mathematical phrase that cοntains variables, cοnstants, and mathematical οperatiοns. It may alsο include expοnents and/οr rοοts. Algebraic expressiοns are used tο represent quantities and relatiοnships between quantities in mathematical situatiοns, οften in the cοntext οf prοblem-sοlving.
The emplοyee's percent is 100% decreased by the emplοyer's percent.
100%−73%=27%
Based on the information you provided, Rubina Shaw's annual premium for the HMO plan is $11,473. Her employer pays 73 percent of this premium, so Rubina's portion of the premium would be:
27% × $11,473 = 0.27 × $11,473 = $3,097.71
The emplοyee's annual cοntributiοn is the prοduct οf the emplοyee's percent and the tοtal premium.
The emplοyee's mοnthly deductiοn is the emplοyee's annual cοntributiοn divided by the number οf mοnths in a year.
$3,097.71 ÷ 12
= $258.14
Emplοyee's annual cοntributiοn: $3,097.71
Emplοyee's mοnthly deductiοn: $258.14
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Complete question:
Find the employee's total annual contribution and the employee's monthly deduction. Rubina Shaw, family plan. HMO annual premium is $11,473. Employer pays 73 percent.
Which rule explains why these triangles are
congruent?
U
T
V
W
AAS
ASA
SAS
SSS
These triangles
cannot be proven
congruent.
These triangles can be proven congruent by using ASA RULE.
What is congruent triangles and its rules ?
When two triangles are congruent, their three sides and their three angles match precisely.
If there is a turn or a flip, the equal sides and angles might not be in the same place, but they are still present.
ASA rule stands for Angle-Side-Angle rule which means two angles and a side of both triangles are equal.
Main Body:
In ΔTUV and ΔTWV
VT =VT ----(1)
∠VTU=∠TVW -----(2)
As TUVW is a parallelogram
so, ∠T = ∠U
hence, ∠TVU =∠VTW ----(3)
taking equation 1, 2,3
therefore, ΔTUV ≅ ΔTWV by ASA rule which means by Angle- Side- Angle rule.
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Given the equation of a circle, x^2 + y^2 - 6x + 2y + 1 = 0, find the coordinates of the center and the length of the radius
Answer:
Center: (3,-1)
Radius: 3
Step-by-step explanation:
Given:
\(\displaystyle \large{x^2+y^2-6x+2y+1=0}\)
First, we have to convert the following standard circle equation to this:
\(\displaystyle \large{(x-h)^2+(y-k)^2=r^2}\)
where h is horizontal shift, k is vertical shift and r is radius.
That means we have to complete the square for both x-term and y-term.
Rearrange the equation:
\(\displaystyle \large{x^2-6x+y^2+2y+1=0}\\\displaystyle \large{(x^2-6x)+(y^2+2y+1)=0}\)
For \(\displaystyle \large{y^2+2y+1}\), can be converted to perfect square as \(\displaystyle \large{(y+1)^2}\). Hence:
\(\displaystyle \large{(x^2-6x)+(y+1)^2=0}\)
For the x-terms, we have to find another value that can complete the square. We know that \(\displaystyle \large{(a\pm b)^2 = a^2 \pm 2ab + b^2}\).
For \(\displaystyle \large{x^2-6x}\) can be \(\displaystyle \large{x^2-2(x)(3)+3^2 \to x^2-6x+9}\). So our another value is 9.
\(\displaystyle \large{(x^2-6x+9-9)+(y+1)^2=0}\)
From above, we add -9 because the original expression isn’t actual perfect square.
Separate -9 out of \(\displaystyle \large{x^2-6x+9}\):
\(\displaystyle \large{(x^2-6x+9)-9+(y+1)^2=0}\)
Transport -9 to add another side:
\(\displaystyle \large{(x^2-6x+9)+(y+1)^2=9}\)
Complete the square:
\(\displaystyle \large{(x-3)^2+(y+1)^2=9}\)
Finally, we have our needed equation to find radius and center. The coordinate of center is defined as the point (h,k) from \(\displaystyle \large{(x-h)^2+(y-k)^2=r^2}\) and the radius is defined as r.
Hence, from the equation:
The coordinate of center is (3,-1) with radius equal to 3.
Troy uses colored sand to make sand art. The storage container for his sand is shaped like a right square prism. He pours some of the sand into a display container shaped like a right triangular prism. When he is done, the height of the sand left in the storage container is 4 in. What is the height of the sand in the display container?
The height of the sand in the display container is 12 inches when the display container is right triangular prism.
What is right triangular prism ?
A right triangular prism is a three-dimensional geometric shape with two parallel triangular bases and three rectangular faces. The rectangular faces connect the corresponding vertices of the triangular bases.
To find the height of the sand in the display container, we need to use the fact that the volume of sand in the storage container is equal to the volume of sand in the display container.
The storage container has a length, width, and height of 6 inch, 6 inch, and 6inche, respectively. Then, the volume of the storage container is:
\(V_{storage} = L * W * H = 6 * 6 * 6 = 216 inch^3\)
Similarly, let's assume that the display container has a base of length 4 inch and height 9 inches and height of sand be H.
Then, the volume of the display container is:
\(V_{display} = (1/2) * b * h * H = (1/2) * 4 * 9 * H = 18H\)
where (1/2) is the area of the triangle base of the display container.
Since the volumes of sand in both containers are equal, we can set these expressions equal to each other and solve for h:
216 = 18H
H = 12 inches
Therefore, the height of the sand in the display container is 12 inches.
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By using graphical method, find optimal solution of the problem max z = 3x + y s.t 2x - y ≤ 5 -x + 3y ≤ 6 x ≥ 0, y ≥ 0
By analyzing the graph and evaluating the objective function at each vertex of the feasible region, we can find the optimal solution, which is the vertex that maximizes the objective function z = 3x + y.
To find the optimal solution of the given problem using the graphical method, we need to plot the feasible region determined by the given constraints and then identify the point within that region that maximizes the objective function.
Let's start by graphing the constraints:
1. Plot the line 2x - y = 5. To do this, find two points on the line by setting x = 0 and solving for y, and setting y = 0 and solving for x. Connect the two points to draw the line.
2. Plot the line -x + 3y = 6 using a similar process.
3. The x-axis and y-axis represent the constraints x ≥ 0 and y ≥ 0, respectively.
Next, identify the feasible region, which is the region where all the constraints are satisfied. This region will be the intersection of the shaded regions determined by each constraint.
Finally, we need to identify the point within the feasible region that maximizes the objective function z = 3x + y. The optimal solution will be the vertex of the feasible region that gives the highest value for the objective function. This can be determined by evaluating the objective function at each vertex and comparing the values.
Note: Without a specific graph or additional information, it is not possible to provide the precise coordinates of the optimal solution in this case.
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Enter the number that belongs in the green box. 4 51° 109°
The answer choice which belongs in the green box and is the longest side of the triangle as required is; 11.06.
What is the length of the longest side?It follows from the task content that since the sum of angles in a triangle is; 180°, the missing angle measure is; 180 - 51 - 109° = 20°.
Consequently, it follows from the sine law that;
4 / sin 20° = x / sin 109°
x = 4 sin 109° / sin 20°
x = 11.06.
Ultimately, the number that belongs in the green box is; 11.06.
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A .14kg baseball is dropped from rest. It has a momentum of .78kg x m/s just before it lands on the ground. For what amount of time was the ball in the air?
Answer
what r the options? a b c d?????
i wuld say it is 2.5
Step-by-step explanation:
Select all the properties of a right triangle.
A. Has a right angle
B. Has one obtuse angle
C. Has parallel lines
D. Has perpendicular lines
E. Has three acute angles
no links!! help please!!
Answer:
A. has a right angle
thats one
Answer:
I think it is A and D. Not 100% sure tho.
what fraction is equivalent to 3/4; what fraction is equivalent to 1/3; what fraction is equivalent to 2/3; what fraction is equivalent to 2/5; what fraction is equivalent to 1/4; what fraction is equivalent to 2/6; equivalent fractions; what fraction is equivalent to 2/4
6/8 is an equivalent fraction to 3/4; 2/6 is equivalent to 1/3; 6/9 is equivalent to 2/3; 10/25 is equivalent to 2/5; 4/16 is equivalent to 1/4; the fraction of 1/3 is equivalent to 2/6; 8/16 is an equivalent fraction to 2/4.
A fraction can be referred to or considered as a divisional representation of a whole number or a percentage, usually represented as a bigger numerical. A fraction denotes the representation of a number in such a way that the meaning or the accuracy of the number is not disturbed, but is shown differently. The fractions equivalent to each other have been mentioned above.
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if angle 1 and angle 2 are vertical, and angle 2 and angle 3 are complentary, angle 3= 56^, what is angle 1
Assuming that a person going to community college can't afford to go to a four-year college is an example of a) a generalization. b) discrimination. O c) a stereotype. O d) tolerance.
Answer:
a) generalization
Step-by-step explanation:
The statement is an example of a generalization. This is because the statement is assumming that all individuals who go to community college are poor. Therefore, this is why they cannot go to a four-year college, and instead go to a community college which is far cheaper. This assumption is being applied to all individuals who attend community college, without any further or more-specific information about each individual, therefore generalizing the entire situation.
PLEASE HELP MEEEEEE I DONT UNDERSTAND
Multiply the price by 0.09, then add that number to the price
47.25 x 0.09 = 4.25
47.25 + 4.25 = 51.50
Cho has 1/5 liter of water. he pours equal amounts of water intyo 3 cups. write an expression for the number of liters of water in each cup.
Answer:
\(\frac{1}{15}\) liters
Step-by-step explanation:
\(\frac{1}{5}\) ÷ 3=
\(\frac{1}{5} *\frac{1}{3} =\\\\\frac{1}{15}\)
There is 1/15 liters of water in each cup.
Answer:
1/15 liters
Step-by-step explanation:
1/5 ÷ 3= 1/15
RULES of Dividing fractions
Keep switch flip
keep 1/5 the same. Flip the division sign to multiplication.
Flip 3/1 into 1/3.
In this diagram, lines AB and CD are parallel.
Angle ABC measures 35°
Angle BAC measures 115°
\(\begin{array}{c |c|}{ \rule{2cm}{0cm}}&{ \rule{4cm}{0cm}} \\ { \boxed {\underline{\bf{Angles}}}}& { \boxed{ \underline{\bf{ Measure \: (degrees)}}}}\\ { \rule{2cm}{0cm}}&{ \rule{4cm}{0cm}}\\\tt \angle{ACE} & \tt115 \degree\\ \tt\angle{DCB} & \tt35 \degree\\ \tt\angle{ACB}& \tt30 \degree \\ { \rule{2cm}{0cm}}&{ \rule{4cm}{0cm}}\end{array}\)
Step-by-step explanation:Given :\( \bf \: {AB}\parallel{CD}\)\( \bf {\angle{ABC} = 35 \degree}\)\( \bf {\angle{BAC} = 115\degree}\)To Find :\(\begin{array}{c |c|}{ \rule{2cm}{0cm}}&{ \rule{4cm}{0cm}} \\ { \boxed {\underline{\bf{Angles}}}}& { \boxed{ \underline{\bf{ Measure \: (degrees)}}}}\\ { \rule{2cm}{0cm}}&{ \rule{4cm}{0cm}}\\ \tt \angle{ACE} & \tt {?} \degree\\ \tt\angle{DCB} & \tt {?} \degree\\ \tt\angle{ACB}& \tt {?}\degree \\ { \rule{2cm}{0cm}}&{ \rule{4cm}{0cm}}\end{array}\)
Solution :\( \bf \: As \: \: {AB}\parallel{CD}\)
\( \bf \implies{ \angle{ACE} = \angle{BAC}} = 115 \degree\)
\( \bf \implies{ \angle{DCB} = \angle{ABC}} = 35 \degree\)
As \(\bf\angle{ABC} = \angle{A} + \angle{B} + \angle{C} = 180\degree\)
\( \bf \implies{ \angle{ACB} = 180 \degree \: - \angle{ABC} - \angle{BAC}} \\ \bf\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 180 \degree - 35 \degree - 115 \degree \\ \:\: = \bf30\degree \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:\)
What is the probability of the next car being silver.
Answer:
40%
Step-by-step explanation:
11+24+16+9=60
24/60=2/5
.40
40%
For the linear equation 3y = 2x + 7, the y-intercept is ___.
Answer:
-7
Step-by-step explanation:
we want y = mx + b
3y = 2x + 7
-2x = -3y + 7
2x = 3y - 7
the y intercept is the standalone number, ergo -7
Answer:
\(\frac{7}{3}\)
Step-by-step explanation:
Change the equation in slope-intercept form and read out y-intercept.
Slope-Intercept Form
y = mx + b
m ... slope
b ... y-intercept
To change given equation to slope-intercept form we isolate y.
\(3y = 2x + 7\)
Divide both sides with 3.
\(y = \frac{2}{3}x + \frac{7}{3}\)
m = \(\frac{2}{3}\)
b = \(\frac{7}{3}\)
which algebraic expression represents this phrase? the product of 16 and the time after the start A. 16· t B. 16-t C. 16/t D. 16+ t
Answer:
the answer is C. 16/t
Step-by-step explanation:
a dog walks 696 steps in 12 minutes. how many steps in 12 minutes
Answer:
696 steps
Step-by-step explanation:
what is the difference between a linear functuon and nonlinear function
Answer:
In mathematics, a function is a rule that assigns one unique output value for each input value. A linear function is a function that has a constant rate of change between its input and output values. This means that if we plot the function on a graph, it will form a straight line.
For example, the function f(x) = 2x + 1 is a linear function because its graph is a straight line. As x increases by 1, the output of the function increases by 2.
On the other hand, a nonlinear function is a function that does not have a constant rate of change between its input and output values. This means that if we plot the function on a graph, it will not form a straight line.
For example, the function f(x) = x^2 is a nonlinear function because its graph is a curve. As x increases, the output of the function increases at an increasing rate.
In general, nonlinear functions can take many different forms and can have complex behaviors, whereas linear functions have a simple, predictable behavior.
Stefan sells Jin a bicycle for $162 and a helmet for $18. The total cost for Jin is 150% of what Stefan spent originally to buy the bike and helmet. How much did Stefan spend originally? How much money did he make by selling the bicycle and helmet to Jin? Stefan originally spent $
Answer:
He spent $110.00 on both originally
Step-by-step explanation:
Add both prices too get 165
Then use the equation =
cross multiply to get 150x=16500
Divide 16500 by 150 to get x alone
x= 180