Answers
Answer:
x = y = 2√7 = 5.292
Step-by-step explanation:
We have a right isosceles triangle, so the length of the hypotenuse is √2 times the length of each leg. Since the hypotenuse is 2√14, each leg measures 2√7.
The length of the sides of the right isosceles triangle is 5.292units.
What is right isosceles triangle?A right isosceles triangle is a special type of triangle that has two equal-length legs and a right angle between them. Because it has two equal legs, it is also an isosceles triangle. The name "right isosceles" comes from the fact that it has a right angle and two equal legs.
In the given question,
In a right isosceles triangle, the two legs are congruent, and the length of the hypotenuse can be found using the Pythagorean theorem:
a² + b² = c²
Since this is an isosceles triangle, we know that a = b, so we can simplify the equation to:
2a² = c²
Taking the square root of both sides, we get:
a√2 = c
In this case, we are given that the hypotenuse has a length of 2√14, so we can set c equal to that value and solve for a:
a√2 = 2√14
a = (2√14)/√2
Simplifying the expression by canceling the square root of 2 in the denominator, we get:
a = 2√7
Therefore, each leg of the isosceles triangle has a length of 2√7, which agrees with your answer.
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Related Questions
Use the box plot. It shows the number of days on the market for single family homes in a city.
Home Sales: Days on the Market
+
0 20 40 60 80 100 120
What is the interquartile range of the data?
F. 70
G. 40
H. 90
I. 120
Answers
The interquartile range (IQR) of the data is 70 and the third and the first quartile of the data is (90, 20).
What is the interquartile range of the data?The second and third quartiles, or the middle half of your data collection, are contained in the interquartile range (IQR). The interquartile range provides the range of the middle half of a data set, whereas the range provides the spread of the entire data collection.
The given plot shows the number of days on the market for single-family homes in the city.
The figure shows the first quartile = 20 and the third quartile 90
Therefore the interquartile range of the data is equal to the difference between the third quartile and the first quartile i.
The interquartile range = Q3 - Q1
= 90 - 20
= 70
The third and first quartiles of the data are (90, 20).
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At an amusement park, Charlie wants to win the big prize. He must earn at least 500 tickets to win it. He won 95 tickets playing the first game, 115 for the second game, 90 tickets in the third game and 75 in the fourth game.
Write an inequality that can be used to solve for the possible number of tickets, x, Charlie must earn in the last game to win the big prize.
Answers
Charlie must earn at least 125 tickets in the last game tο win the big prize.
What is Linear Inequality?A linear inequality is a mathematical statement that compares twο expressiοns using the symbοls < (less than), > (greater than), ≤ (less than οr equal tο), οr ≥ (greater than οr equal tο), and where bοth expressiοns are linear functiοns οf the same variables. It describes range οf values that the variables can take while satisfying the inequality.
Let x be the number οf tickets that Charlie must earn in the last game tο win the big prize.
The tοtal number οf tickets Charlie has won so far is the sum οf the tickets frοm all the games he has played:
95 + 115 + 90 + 75 = 375.
Tο win the big prize, Charlie must earn at least 500 tickets in tοtal.
Therefοre, we can write the fοllοwing inequality tο sοlve fοr the pοssible number οf tickets, x:
375 + x ≥ 500
Simplifying the inequality:
x ≥ 500 - 375
x ≥ 125
Therefore, Charlie must earn at least 125 tickets in the last game to win the big prize.
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Use Figure 1 to answer the following question
Name a set of collinear points
Name a set of parallel lines
Name a set of concurrent lines
Name a ray
Name an obtuse angle
Name a right angle
Name a pair of adjacent angles
Name a pair of complementary angles
Name a pair of supplementary angles
Name a pair of vertical angles
Answers
The set of points and lines when named are listed below
Naming the set of points and linesUsing the figure as a guide, we have the following:
Name a set of collinear points: B and EName a set of parallel lines: AO and BEName a set of concurrent lines: SM and HNName a ray: OWName an obtuse angle: JBTName a right angle: BECName a pair of adjacent angles: BEC and BENName a pair of complementary angles: AOW and WOPName a pair of supplementary angles: AOB and WOPName a pair of vertical angles: TBG and PBERead more about points and lines at
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A rectangular container 6.5 ft long, 3.2 ft wide and 2 ft high is filled with sand to a depth of 1.3 ft. How much sand is in the container?
Answers
Answer:
Therefore, there are 27.04 cubic feet of sand in the container.
Step-by-step explanation:
We can start by calculating the volume of the rectangular container:
Volume = length x width x height
Volume = 6.5 ft x 3.2 ft x 2 ft
Volume = 41.6 cubic feet
Since the sand fills the container to a depth of 1.3 feet, we can calculate the volume of the sand as follows:
Volume of sand = length x width x depth of sand
Volume of sand = 6.5 ft x 3.2 ft x 1.3 ft
Volume of sand = 27.04 cubic feet
Therefore, there are 27.04 cubic feet of sand in the container.
I have 30 eggs, I broke ten, I sold five, I cook ten, and I fry ten. How many are remaining?
Answers
Answer:
Step-by-step explanation:
ER=(5) [A single,1-tuple]. You start with 30 eggs. After selling 5 eggs, cooking 10, and frying 10 eggs 5 eggs remain.
PREMISES
ER=(E-S)-(C+F)
ASSUMPTIONS
Let E=the number of eggs at the start (30)
Let S=the number of eggs that were sold (5)
Let C=the number of eggs that were “cooked” i.e., hard-boiled, poached, and so forth (10)
Let F=the number of eggs that were fried (10)
Let ER=the number of eggs that remain having not been sold, cooked, or fried
CALCULATIONS
ER=(E-S)-(10+10)
ER=(30–5)-(20)
ER=25–20
ER=
5 eggs
PROOF
If ER=5, then the mathematic sentence ER=(E-S)-(C+F) returns
ER=(30–5)-(C+F)
5=25-(10+10)
5=25–20 and
5=5 verifies the result ER=5 of the sentence
under 21
21-34
35-54
55 and
older
Total
Basketball Football Soccer Baseball
10
9
8
5
32
N
7
10
5
7
29
10
5
10
8
Sport
33
9
9
5
9
29
Other/Hate
Sports
6
10
7
6
29
Total
42
32 133
43
35
32
152
What percent of the people between the ages of 35 and 54 prefer baseball? Round
your answer to the nearest whole number percent.
Answers
The percentage of the people between the ages of 35 and 54 that prefer baseball is 17.14%.
What does a preference means?A preferences means the certain characteristics that any person wants to have in a good/service to make it preferable to him.
In the table, the total number of people between the ages of 35 and 54 is 35. Out of the 35 people, the people that prefer baseball is known to be 6.
Now, the percentage between the ages of 35 and 54 that prefer baseball will be:
= Baseball preference / Total number of people aged 35 and 54
= 6/35
= 0.17142857142
= 17.14%
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0.416 (6 repeating) into fration
Answers
0.41666666
...
×
3
=
1.25
3
Now, you have a number 1.25 which is easily recognizable as 5/4:
5
4
3
=
5
12
Write the slope-intercept form of the equation of the line passing through the point (4, 5) and perpendicular to the line y =3/8x + 3.
Answers
Answer:
Step-by-step explanation:
Because the lines are perpendicular the slopes will be negtive
reciprocals of each other. Thus slope of 3/8 becomes -8/3.
Using point slope formula: y - y1 = m(x - x1)
Substitute the point given with the new slope and solve.
y - 5 = -8/3(x - 4)
y - 5 = -8/3x - - 32/3
y - 5 = -8/3x + 32/3
y - 5 + 5 = -8/3x + 32/3 + 5
y = -8/3x + 47/3
or
y = -8/3x + 15 2/3
a swimming pool is 20 ft wide, 40 ft long, 3 ft deep at the shallow end, and 9 ft deep at its deepest point. a cross-section is shown in the figure. if the pool is being filled at a rate of 0.9 ft 3 /min , how fast is the water level rising when the depth at the deepest point is 5 ft ? (round your answer to five decimal places.)
Answers
The water level is rising at a rate of 0.0075 ft/min when the depth at the deepest point is 5 ft.
Let's call the depth at the deepest point of the pool "y" and the volume of
the water in the pool "V".
We want to find the rate at which the water level is rising, which is the
rate of change of "y" with respect to time.
We know the rate at which the pool is being filled, which is 0.9 ft3/min,
and we can find the rate at which the volume of the water is increasing
using the formula for the volume of a rectangular prism:
V = lwh
where l is the length, w is the width, and h is the height.
Since the pool is not rectangular, we can find the volume of the water as
a function of "y" using similar triangles:
h/y = (9 - 3)/(40 - 20) = 0.3
where h is the height of the pool at the deepest point. Solving for h, we get:
h = 0.3y
Substituting this expression for h into the formula for the volume, we get:
V = lw(3 + 0.6y)
Taking the derivative with respect to time, we get:
dV/dt = lw(0.6 dy/dt)
Now we need to find the values of l and w. The width is given as 20 ft,
and the length is a function of "y":
l = 40 - 2(40 - y) = 2y
Substituting these values into the expression for dV/dt, we get:
dV/dt = 40y(0.6 dy/dt)
Finally, we can find the rate at which the water level is rising when y = 5 ft
by plugging in the values:
0.9 = 40(5)(0.6 dy/dt)
Solving for dy/dt, we get:
dy/dt = 0.9/(4050.6) = 0.0075 ft/min
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11. Alina is flying a kite. The kite string is fully extended and measures 37 feet in length.
The kite is 12 feet east of Alina. Which equation can be used to find the height of the kite?
How high is the kite? Select all that apply.
a. 12² + b² = 37²
b.
37 = 0.5(12)(b)
c. 12 feet
d. 25 feet
Answers
Answer: A | 12² + b² = 37²
Step-by-step explanation:
The height can be found by using the Pythagoras Theorem
h² = b² + p²
I need help finding A
Answers
The value of a in the given parabola is a = 4/5.
What is parabola?A quadratic function's graph is a parabola. A parabola, according to Pascal, is a circle's projection. Galileo described the parabolic route that projectiles take when they fall under the influence of uniform gravity. Several bodily movements have a curvilinear course that has the form of a parabola. In mathematics, a parabola is any planar curve that is mirror-symmetrical and typically resembles a U shape.
We know that the parabola passes through (-3, 0) and (5, 0), so we can write:
0 = a(-3)² + b(-3) + c (equation 1)
0 = a(5)² + b(5) + c (equation 2)
We also know that the parabola passes through (1, -32), so we can write:
-32 = a(1)² + b(1) + c (equation 3)
Equating the equation 1 and 2 we have:
9a - 3b + c = 25a + 5b + c
16a + 2b = 0 (equation 4)
Now, equation i can be written as:
c = - 9a + 3b
Substituting in equation 3 we have:
-32 = a + b - 9a + 3b
-32 = -8a + 4b
-8 = -2a + b (equation 5)
b = -8 + 2a
Substitute the value of b in equation 4:
16a + 2(-8 + 2a) = 0
16a - 16 + 4a = =
20a = 16
a = 16/20 = 4/5
Hence, the value of a in the given parabola is a = 4/5.
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find the surface area of the composite figure/ triangular prism 10, 5, 10 height of 8cm/ rectangular prism 4, 5, 12, 4
Answers
Answer:
Therefore, the surface area of the composite figure is 368 cm².
Step-by-step explanation:
To find the surface area of the composite figure, we need to find the areas of each individual face and add them together.
The triangular prism has two triangular faces and three rectangular faces.
The area of each triangular face is 1/2(base × height).
Area of each triangular face = 1/2(10 × 5) = 25 cm²
The area of each rectangular face is length × width.
Area of the rectangular face with dimensions 5 cm by 10 cm = 5 × 10 = 50 cm²
Area of the rectangular face with dimensions 5 cm by 10 cm = 5 × 10 = 50 cm²
Area of the rectangular face with dimensions 10 cm by 8 cm = 10 × 8 = 80 cm²
Total area of the triangular prism = 2 × 25 + 3 × 50 + 80 = 280 cm²
The rectangular prism has two rectangular faces and four square faces.
The area of each rectangular face is length × width.
Area of the rectangular face with dimensions 4 cm by 5 cm = 4 × 5 = 20 cm²
Area of the rectangular face with dimensions 4 cm by 5 cm = 4 × 5 = 20 cm²
The area of each square face is side × side.
Area of each square face with side length 4 cm = 4 × 4 = 16 cm²
Total area of the rectangular prism = 2 × 20 + 4 × 16 = 88 cm²
The total surface area of the composite figure is the sum of the surface areas of the triangular prism and the rectangular prism.
Total surface area = surface area of triangular prism + surface area of rectangular prism
= 280 cm² + 88 cm²
= 368 cm²
in a term 1 maths test , whitney scored 55 marks and amir scored 40 marks in a term 2 maths test whitney increased her score by 2o percent and amir increased jis score by 20 marka who had the higher mark in term 2
Answers
Answer:
whitney
Step-by-step explanation:
so amir in term 2 has 40+20=60
and whitney has 55+11=66
11 because 20% of 55 is 11 and when you add that two numbers you got the answer that whitney have higher mark
10% of 55=5.5
20% = 10%×2
5.5×2=11
Find the shaded area. Round your answer to the nearest tenth, if necessary.
Area of of the Triangle =
Area of the whole Rectangle =
Total Shaded Area =
Answers
Answer: For the triangle area you do= base*height what gives you 198in
For the rectangle area you do= side*lenght what gives you 756in
An for the shaded area you do triangle area-rectangle area, what gives you 558 in
A rectangle has a length that is 5 inches greater than its width, and its area is 104 square inches. The equation (x + 5)x = 104 represents the situation, where x represents the width of the rectangle.
The first step in solving by factoring is to write the equation in standard form, setting one side equal to zero. What is the equation for the situation, written in standard form?
a. x2 – 99 = 0
b. x2 – 99x = 0
c. x2 + 5x + 104 = 0
d. x2 + 5x – 104 = 0
Answers
Answer:
d. x² + 5x - 104 = 0
Step-by-step explanation:
(x+5)x = 104
x² + 5x = 104
x² + 5x - 104 = 0
a certain medical test is known to detect 84% of the people who are afflicted with the disease y. if 10 people with the disease are administered the test, what is the probability that the test will show that: all 10 have the disease, rounded to four decimal places? 0.1749 at least 8 have the disease, rounded to four decimal places? at most 4 have the disease, rounded to fo
Answers
Rounding to four decimal places, the probability is (a) 0.3273 (b) 0.8423, and (c) 0.0446.
We can model this problem using a binomial distribution, where the probability of success (having the disease) is p = 0.84, and the number of trials (people tested) is n = 10.
(a) To find the probability that all 10 people have the disease, we can calculate the:
P(X = 10) = (10 choose 10) * (0.84)^10 * (1-0.84)^(10-10) = 0.3273
Rounding to four decimal places, the probability is 0.3273.
(b) To find the probability that at least 8 people have the disease, we can calculate the:
P(X ≥ 8) = P(X = 8) + P(X = 9) + P(X = 10)
We can find each term using the binomial probability formula and then add them up:
P(X = 8) = (10 choose 8) * (0.84)^8 * (1-0.84)^(10-8) = 0.2018
P(X = 9) = (10 choose 9) * (0.84)^9 * (1-0.84)^(10-9) = 0.3132
P(X = 10) = (10 choose 10) * (0.84)^10 * (1-0.84)^(10-10) = 0.3273
P(X ≥ 8) = 0.2018 + 0.3132 + 0.3273 = 0.8423
Rounding to four decimal places, the probability is 0.8423.
(c) To find the probability that at most 4 people have the disease, we can calculate:
[tex]P(X ≤ 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)[/tex]
We can find each term using the binomial probability formula and then add them up:
P(X = 0) = (10 choose 0) * (0.84)^0 * (1-0.84)^(10-0) = 0.000004
P(X = 1) = (10 choose 1) * (0.84)^1 * (1-0.84)^(10-1) = 0.0001
P(X = 2) = (10 choose 2) * (0.84)^2 * (1-0.84)^(10-2) = 0.0012
P(X = 3) = (10 choose 3) * (0.84)^3 * (1-0.84)^(10-3) = 0.0084
P(X = 4) = (10 choose 4) * (0.84)^4 * (1-0.84)^(10-4) = 0.0348
P(X ≤ 4) = 0.000004 + 0.0001 + 0.0012 + 0.0084 + 0.0348 = 0.0446
Rounding to four decimal places, the probability is 0.0446.
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Select the correct equation for the following sentence: Twenty-four is the same as 31.4 times a number plus negative 8.4. 31.4n + 8.4 = 24 –8.4n + 31.4 = 24 24 = 31.4n + (–8.4) 24 – 31.4 = –8.4n
Answers
Answer:
24 = 31.4n + (–8.4)
Step-by-step explanation:
24=31.4n-8.4
A total of 70 tickets were sold for a concert and earn the organizers $804. If the cost of each ticket is either $10 or $12, how many tickets of each type were sold?
Answers
Answer:
Step-by-step explanation:
18 tickets cost $10 and 52 tickets cost $12.
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Answers
Answer:
(what is your question)
find the length of SU
Answers
Answer:
Point T is on a line segment SU. Given SU=4x+1, TU=3x, and ST=3x-1, determine the numerical length of SU
Step-by-step explanation:
By the segment addition rule, length of ST + length TU equals length of SU so 3x -1 + 3x = 4x + 1 6x - 1 = 4x + 1 2x = 2 x = 1 substituting value of x back into formula for length of SU: 4 (1) + 1 = 5
5x^2-15x-50 factor the polynomial
Answers
10x-50
10(x-5)
Answer:
5(x - 5)(x + 2)
Step-by-step explanation:
5x² - 15x - 50
5(x² - 3x - 10)
5(x - 5)(x + 2)
4-23 use the data in problem 4-22 and develop a regression model to predict selling price based on the square footage and number of bedrooms. use this to predict the selling price of a 2,000-square-foot house with three bedrooms. compare this model with the models in problem 4-22. should the number of bedrooms be included in the model? why or why not?
Answers
A regression model can be created to predict selling price based on square footage and number of bedrooms using available data. The model equation includes coefficients that can be estimated to predict the selling price of a house. The number of bedrooms is a significant predictor of selling price and should be included in the model.
To develop the regression model to predict selling price based on the square footage and number of bedrooms, the following steps can be taken:
Collect data on the selling price, square footage, and number of bedrooms for a sample of houses.
Create a scatter plot to visually inspect the relationship between selling price and square footage, and between selling price and number of bedrooms.
Use regression analysis to create a model that predicts selling price based on square footage and number of bedrooms. The model equation will be:
Selling price = b0 + b1(Square footage) + b2(Number of bedrooms)
where b0, b1, and b2 are coefficients to be estimated from the data.
To predict the selling price of a 2,000-square-foot house with three bedrooms, substitute the values into the model equation and solve for selling price:
Selling price = b0 + b1(2000) + b2(3)
Comparing the performance of this model with the models in problem 4-22. The number of bedrooms should be included in the model because it is a significant predictor of selling price. However, further analysis could be conducted to determine if other variables could improve the model's predictive power.
Overall, this regression model can provide a useful estimate of the selling price of a house based on its square footage and number of bedrooms.
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Hattie is on a boat 74 metres away from the foot of a vertical cliff. The height of the cliff is 94 metres. Calculate the angle of depression of the boat from the top of the cliff.
Answers
The angle of depression of the boat from the top of the cliff = 51.78 degrees
To calculate the angle of depression of the boat from the top of the cliff, we need to draw a diagram to visualize the situation.
In this instance, we can draw a right-angled triangle with one side representing the cliff's height (94m) and the other representing the horizontal distance between the boat and the cliff's foot. (74m). This triangle's hypotenuse depicts the line of sight from the top of the cliff to the boat.
The angle of depression is defined as the angle formed by the horizontal line and the line of sight from the cliff's summit to the boat.
We can use the tan function to determine this angle.
tan(angle of depression) = (height of cliff) / (horizontal distance from the boat to the foot of the cliff)
tan(∅) = (h/x)
tan(angle of depression) = 94 / 74
angle of depression = [tex]tanx^{-1} (94/74)[/tex]
angle of depression = 51.788974574 degrees
Therefore, the angle of depression of the boat from the top of the cliff is approximately 51.78 degrees.
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The angle of depression of the boat from the top of the cliff is approximately 50.67 degrees.
To calculate the angle of depression of the boat from the top of the cliff, we can use trigonometry. The angle of depression is the angle formed between the horizontal line (parallel to the ground) and the line of sight from the top of the cliff to the boat.
In this scenario, we have a right triangle formed by the cliff, the boat, and the horizontal line connecting them.
Let's denote the angle of depression as θ.
Using trigonometric ratios, we can use the tangent function to calculate the angle of depression:
tan(θ) = opposite/adjacent
In this case, the opposite side is the height of the cliff (94 meters) and the adjacent side is the horizontal distance from the foot of the cliff to the boat (74 meters).
tan(θ) = 94/74
To find θ, we can take the inverse tangent (arctan) of both sides:
θ = arctan(94/74)
Using a calculator or trigonometric table, we can find that θ is approximately 50.67 degrees.
Therefore, the angle of depression of the boat from the top of the cliff is approximately 50.67 degrees.
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(4a–3)^(2)–16 wirte the expresion as a product
Answers
Answer: 16a^2−24a−7
Step-by-step explanation:
Write the equation of each line in slope-intercept form.
Answers
LET'S TRY TO KNOW ABOUT
What is the Slope Intercept Form of a Line?The graph of the linear equation y = mx + c is a line with m as the slope, and m, and c as the y-intercept. This form of the linear equation is called the slope-intercept form, and the values of m and c are real numbers.
The slope, m, represents the steepness of a line. The slope of the line is also termed a gradient, sometimes. The y-intercept, b, of a line, represents the y-coordinate of the point where the graph of the line intersects the y-axis.
Here, the distance c is called the y-intercept of the given line L.
So, the coordinate of a point where the line L meets the y-axis will be
(0, c). That means line L passes through a fixed point (0, c) with slope m.
We know that, the equation of a line in point-slope form, where (x1, y1) is the point and slope m is:
(y – y1) = m(x – x1)
Here, (x1, y1) = (0, c)
Substituting these values, we get;
y – c = m(x – 0)
y – c = mx
y = mx + c
Therefore, the point (x, y) on the line with slope m and y-intercept c lies on the line if and only if y = mx + c
Note: The value of c can be positive or negative based on the intercept made on the positive or negative side of the y-axis, respectively
Slope Intercept Form x Intercept
We can write the formula for the slope-intercept form of the equation of line L whose slope is m and x-intercept d as:
y = m(x – d)
Here,
m = Slope of the line
d = x-intercept of the line
Sometimes, the slope of a line may be expressed in terms of tangent angle such as:
m = tan θ
I need to know the steps too I’ve been struggling with this all week:/
Answers
To find the inverse cosine (cos⁻¹) of a value, you can use a calculator or a programming language that includes trigonometric functions. In this case, we want to find the angle whose cosine is 7/8.
cos⁻¹(7/8) = θ
Using a calculator or programming language:
θ ≈ 30.96°
Rounded to the nearest degree:
θ ≈ 31°
So, cos⁻¹(7/8) is approximately 31°.
Answer:
The answer would be 28.96
Step-by-step explanation:
Sorry I was'nt to explain step by step But I know the answer
Chen subtracted two polynomials as shown. Explain Chen’s error.
P^2+7mp+4-(-2p^2-mp+1)
P^2+2p^2+7mp-mp+4+1
3p^2+6m+5
Answers
The correct answer is 3p² + 8mp + 3, which is different from Chen's answer of 3p² + 6m + 5.
What is a polynomial?
In mathematics, a polynomial is an expression consisting of variables (also known as indeterminates) and coefficients, which involves only the operations of addition, subtraction, and multiplication. Polynomials can have one or more terms, and each term can have one or more variables with non-negative integer exponents.
Chen's error is in the second line where they added the terms -(-2p²-mp+1) without distributing the negative sign to each term inside the bracket. The correct way to subtract a polynomial is to change the sign of each term inside the bracket and then add them to the other polynomial. So, the correct simplification would be:
P²+7mp+4-(-2p²-mp+1)
= P²+7mp+4+2p²+mp-1 (Distributing the negative sign)
= 3p²+8mp+3
Therefore, the correct answer is 3p² + 8mp + 3, which is different from Chen's answer of 3p² + 6m + 5.
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a quality control specialist at a plate glass factory must estimate the mean clarity rating of a new batch of glass sheets being produced using a sample of 18 sheets of glass. the actual distribution of this batch is unknown, but preliminary investigations show that a normal approximation is reasonable. the specialist should use a: group of answer choices t-distribution none of the distributions listed. z-distribution chi-square distribution f distribution
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The quality control specialist should use a t-distribution for estimating the mean clarity rating of the new batch of glass sheets being produced using a sample of 18 sheets of glass.
The quality control specialist at a plate glass factory must estimate the mean clarity rating of a new batch of glass sheets being produced using a sample of 18 sheets of glass.
Since the actual distribution of this batch is unknown, but preliminary investigations show that a normal approximation is reasonable, the specialist should use a t-distribution.
1. The sample size (n) is 18, which is relatively small.
2. The population standard deviation (σ) is unknown.
In such cases, the t-distribution is more appropriate than the z-distribution, chi-square distribution, or f distribution.
The t-distribution is a statistical distribution that is used when the sample size is small, and the population standard deviation is unknown.
The z-distribution is used when the population standard deviation is known, and the sample size is large enough (typically, n > 30).
The chi-square distribution is used for testing the goodness-of-fit of a distribution or for testing the independence between two categorical variables.
The f distribution is used for comparing the variances of two populations.
It is not suitable for estimating the mean clarity rating in this case.
In conclusion, the quality control specialist should use a t-distribution for estimating the mean clarity rating of the new batch of glass sheets being produced using a sample of 18 sheets of glass.
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using gradient=rise/run find the gradient of ab in the following (0,6) and (3,2)
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The gradient of the line segment AB is -4/3.
What is the gradient?
The gradient is a measure of the steepness of a curve or surface at a particular point. It is a vector quantity that points in the direction of the greatest increase in the function value and whose magnitude gives the rate of change of the function in that direction.
The coordinates of point A are (0, 6), and the coordinates of point B are (3, 2). We can find the gradient of the line connecting these two points using the formula:
gradient = rise/run
where "rise" is the difference in the y-coordinates of the two points, and "run" is the difference in the x-coordinates.
So, we have:
rise = 2 - 6 = -4
run = 3 - 0 = 3
Plugging these values into the formula, we get:
gradient = -4 / 3
Therefore, the gradient of the line segment AB is -4/3.
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Factor out the greatest common factor (GCF) from 6x^4 + 8x^3
Answers
Required factor form is 2x³(3x + 4).
What is GCF?
GCF stands for Greatest Common Factor, also known as the Greatest Common Divisor (GCD). In mathematics, the GCF of two or more numbers is the largest positive integer that divides each of the numbers without a remainder. For example, the GCF of 12 and 18 is 6 because 6 is the largest integer that divides both 12 and 18 without a remainder. The concept of GCF is important in many areas of mathematics, including algebra, number theory, and calculus, and is used in various problem-solving applications.
Given form is 6x⁴+8x³.
Here is two term 6x⁴ and 8x³.
By factorisation,
6x⁴ = 2×3×x⁴ and 8x³ = 2×2×2×x³
The greatest common factor (GCF) of 6x⁴ and 8x³ is 2x³.
To factor it out, we can divide each term by 2x³:
Now,
6x⁴ ÷ 2x³ = 3x
8x³ ÷ 2x³ = 4
So, we can write:
6x⁴ + 8x³ = 2x³(3x + 4)
Therefore, the factored form of 6x⁴ + 8x³ is 2x³(3x + 4).
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