Answer:
To verify the given identity:
(1 - cos a) (1 + cot a)
= (1 - cos a) (1 + cos a / sin a) [since cot a = cos a / sin a]
= 1 - cos^2 a / sin a + cos a - cos^2 a / sin a
= 1 - (cos^2 a + cos^2 a) / sin a + cos a
= 1 - 2 cos^2 a / sin a + cos a
= 1 - 2 (1 - sin^2 a) / sin a + cos a [since cos^2 a = 1 - sin^2 a]
= 1 - 2 / sin a + 2 sin a / sin a + cos a
= 1 - 2 / sin a + 2 + cos a
= 1 + 2 (1 - sin a) / sin a
= 1 + 2 cos^2 a / sin a
= 1 + 2 cot^2 a
= (1 + cot^2 a) + 2 cot^2 a
= cosec^2 a + 2 cot^2 a
= 1 + cot^2 a [since cosec^2 a = 1 + cot^2 a]
Therefore, (1 - cos a) (1 + cot a) = 1 is true.
identify the four statements that could be used to prove lines r and s are parallel
The inner angles of 4 and 7 alternate and are congruent as the angles 3 and 8 are similar and coincide.
what is angles ?A geometric shape known as an angle is created by two rays of line segments that meet at a location known as the vertex of angle. The rays or splines that make up the angle are referred to as its sides or legs. Angles can be divided into different categories according to their size and shape and are commonly measured either degrees or radians. Right ratios, obtuse angles, reflex angles, acute angles, and straight angles are a few examples of common angles.
given
The following four claims could be used to demonstrate that lines r and s are parallel:
The angles 1 and 6 have comparable and congruent angles.
The inner angles of 2 and 5 alternate and are congruent.
The angles 3 and 8 are similar and coincide.
The inner angles of 4 and 7 alternate and are congruent as the angles 3 and 8 are similar and coincide.
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Correct gets brainliest Here is a prism with a pentagonal base. The height is 8 cm.
Check image for full question
Answer:
232 cubic centimeters
Step-by-step explanation:
V = Bh
= (7(2) + (1/2)(3)(3 + 7))(8)
= (14 + 15)(8) = 29(8)
= 232 cubic centimeters
3. Han found a way to compute complicated expressions more easily. Since 2.5 = 10,
he looks for pairings of 2s and 5s that he knows equal 10. For example,
(2.5)4 = 15 104 = 150,000. Use Han's
3.24.55= 3.24.54.5 = (3.5)
technique to compute the following:
a. 2^4 * 5 * (3*5)³
b.
2^3 *5^2*(2.3)²*(3.5)²/3^2
Please help me this is urgent
Answer:
The rate of change is 400
The altitude increases by 400 feet every minute.
Step-by-step explanation:
We Know
x = the number of minutes the balloon rises.
y = altitude of the balloon.
To find the Rate of change (slope), we can use rise/run or (y2 - y1) / (x2 - x1)
Pick 2 points (0, 150) (1, 550)
We see the y increase by 400 and the x increase by 1, so
The rate of change is 400
The altitude increases by 400 feet every minute.
Pre algebra angle relationships summarize 5
Complementary angles, Supplementary angles, Vertical angles, Adjacent angles and Linear pairs these are the 5 Pre algebra angle.
To summarize 5 angle relationships in pre-algebra, we can discuss the following:
1. Complementary angles: These are two angles that add up to 90 degrees. To find a complementary angle, subtract the given angle from 90 degrees. For example, if the given angle is 30 degrees, its complementary angle is 60 degrees (90 - 30 = 60).
2. Supplementary angles: These are two angles that add up to 180 degrees. To find a supplementary angle, subtract the given angle from 180 degrees. For example, if the given angle is 120 degrees, its supplementary angle is 60 degrees (180 - 120 = 60).
3. Vertical angles: These are angles that are opposite each other when two lines intersect. Vertical angles are always equal. For example, if one angle measures 40 degrees, its vertical angle will also be 40 degrees.
4. Adjacent angles: These are angles that share a common side and vertex but do not overlap. Adjacent angles can be complementary, supplementary, or neither, depending on their degree measures.
5. Linear pairs: These are adjacent angles that add up to 180 degrees,
forming a straight line. Both angles in a linear pair are supplementary.
When working with angle relationships in pre-algebra, remember these
five concepts to help you find missing angle measurements and solve problems.
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14. Which triangles are similar?
The two triangles therefore meet the Angle-Angle (AA) similarity criterion, which specifies that two angles of one triangle must be congruent with two angles .
what is angles ?Angles are typically modeled with a symbol that resembles a tiny arc between the angle's two sides, with a dot at the vertex. For illustration, angle BAC might be used to represent the angle created by the vectors AB and AC, with point A serving as the vertex. Calculus, geometry, trigonometry, and other branches of mathematics all depend on angles. They are used to calculate different quantities linked to angles and their trigonometry, to measure distances and areas, and to describe the shapes and sizes of objects.
given
Triangles ABD and ECD in the given figure are comparable triangles since they share the same shape and have equal corresponding angles. Angles ADB and CDE are equal because they are formed when parallel lines AB and CD are intersected by transversal BD, and angle BAD and angle EDC are also equal because they are formed when parallel lines AD and EC are intersected by transversal BD. In particular, angle ABD and angle ECD are both right angles (90 degrees).
The two triangles therefore meet the Angle-Angle (AA) similarity criterion, which specifies that two angles of one triangle must be congruent with two angles of another triangle in order for the triangles to be comparable.
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Shannon wants to buy a car but only has half as much money as she needs. If Shannon deposits the money into a savings account that earns 10.99% interest compounded quarterly, how long will it take for her money to double?
Round your answer to the nearest month.
it will take Shannon about 80 months for her money to double if she deposits it into a savings account that earns 10.99% interest compounded quarterly.
Shannon's funds will double in value during the following period of time, according to the quarterly compound interest formula:
[tex]A = P(1+r/n)^{nt}[/tex]
where n is the number of times interest is compounded each year, r is the yearly interest rate, P is the principal amount, A is the amount after t years, and t is the amount of time in years.
Shannon currently has P/2 dollars, which is half of what she needs. Finding t when A = 2P will help us determine how long it will take for her money to double.
We are aware that n = 4 and r = 10.99%. (since interest is compounded quarterly). Solving for t using these values as input results in:
[tex]2P = P/2(1 + 0.1099/4)^{(4t) }\\4 = (1 + 0.1099/4)^{(4t)} log(4) \\= 4t log(1 + 0.1099/4)^ t = log(4)/(4 log(1 + 0.1099/4))[/tex]
t ≈ 6.7 years
Rounding this to the nearest month gives:
t ≈ 80 months
Therefore, it will take Shannon about 80 months for her money to double if she deposits it into a savings account that earns 10.99% interest compounded quarterly.
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What is the volume, in cubic inches, of a rectangular prism with a height of 6 inches, a width of 18 inches, and a length of 10 inches?
the volume of the rectangular prism is 1,080 cubic inches.
Why is it?
The volume V of a rectangular prism is given by the formula:
V = length x width x height
Substituting the given values, we get:
V = 10 inches x 18 inches x 6 inches
Simplifying, we get:
V = 1,080 cubic inches
Therefore, the volume of the rectangular prism is 1,080 cubic inches.
A rectangular prism is a three-dimensional solid shape that has six rectangular faces, where each pair of opposite faces are congruent and parallel to each other. It is also known as a rectangular parallelepiped.
A rectangular prism is characterized by its length, width, and height or depth. The length is the measurement of the longest side of the prism, the width is the measurement of the shorter side, and the height or depth is the measurement of the perpendicular distance between the two faces that are parallel to each other.
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Which of the following expressions is a factor of the polynomial 2x^2-5x-18
Answer:
(x+2)(2x-9)
Step-by-step explanation:
2x^2 + 4x - 9x - 18
2x(x+2) -9(x+2)
(x+2)(2x-9)
Find the 61st term of the following arithmetic sequence7,16,25,34
Answer:
61st term = 547
Step-by-step explanation:
The formula for the nth term of an arithmetic sequence is
[tex]a_{n}=a_{1}+(n-1)d[/tex], where a1 is the first term, n is the term position (e.g., 1st or 61st) and d is the common difference.
We already know that a1 = 7 and the n = 61. We can find the common difference by finding the difference of any two consecutive terms with the smaller term being subtracting from the larger:
Thus, if we use 7 and 16, our common difference (d) is:
d = 16 - 7 = 9
Now, we can simply plug in everything to the formula to find the 61st term:
[tex]a_{61}=7+(61-1)*9\\ a_{61}=7+60*9\\ a_{61}=7+540\\ a_{61}=547[/tex]
I got stuck at on a problem what is 3x+4+2x+5=34?
Given:
[tex]3x+2x=34-5-4[/tex]
[tex]5x=29-4[/tex]
[tex]5x=25[/tex]
[tex]x=25\div5[/tex]
Answer:
[tex]\bold{x=5}[/tex]x = 5
Step-by-step explanation:Given: 3x+4+2x+5=34
first combine similar values,
3x + 2x and 4 + 5
5x + 9 = 34
time for substitution
5x + 9 - 9 = 34 - 9
5x = 25
divide by the value of x in this instance it is 5
5x = 25 / 5
x= 5
now to check we will plug in 5 for x
3(5) +4+2 (5) +5=34
15 + 4 + 10 + 5 = 34
19 + 15 = 34
34 = 34✓
Hope this helps, happy learning =D
if an ice block 10 centimeters wide, 10 centimeters high, and 20 centimeters long was melted, how much would it raise the water level in a tank that is 100 centimeters long by 40 centimeters wide?
Step-by-step explanation:
Volume of ice = 10 X 10 X 20 = 2000 cm^3
tank volume increase will be the same
100 x 40 x HEIGHT = 2000
Height = 2000/ ( 100 X 40) = .5 cm height increase
The melting of the ice block would raise the water level in the tank by approximately 0.5 centimeters. This can be answered by the concept of Volume
To calculate the amount of water that would be displaced by the ice block, we need to first find its volume, which is 10 x 10 x 20 = 2000 cubic centimeters. Since 1 cubic centimeter of water has a mass of 1 gram, the mass of the ice block would be 2000 grams or 2 kilograms.
When the ice block melts, it will turn into water and occupy the same volume, which would displace an equal amount of water in the tank. The volume of the tank is 100 x 40 x h, where h is the increase in water level. Setting the volume of the ice block equal to the increase in the water level, we get:
2000 = 100 x 40 x h
h = 0.5 centimeters
Therefore, the melting of the ice block would raise the water level in the tank by approximately 0.5 centimeters.
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How many solutions does this linear system have?
y = 2x – 5
–8x – 4y = –20
one solution: (–2.5, 0)
one solution: (2.5, 0)
no solution
infinite number of solutions
infinite number of solutions
Answer:
A system of linear system equation usually has a single solution but some time it can have no solution or infinte solution(Same line)
when the sample size, n, is increased, but the sample proportion and confidence level remain the same, what happens to the multiplier (z*) for a confidence interval?
The multiplier (z*) for a confidence level will remain the same, if sample proportion and confidence level is unchanged.
The multiplier of confidence interval is defined as the number of standard errors at the distance from mean. It is dependent on confidence level and sample data distribution.
Confidence levels refers to the certainty of correctness and preciseness of interval. It is expressed as percentage.
The increase in sample size decreases the standard error. Moreover, as the question states, the unchanged values of confidence interval and sample size are there, which makes the multiplier constant.
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help exponents thank you in advance
Answer:
hope this helps please mark me as brainlist
The PTA at Middletown High School is having its annual dinner and auction to raise money for music and art programs. Last year, the event raised $20,800. This year, it raised $31,408. What is the percent of increase in the amount raised?
Answer:
51%
Step-by-step explanation:
31,408-20,800=10,608÷20,800=0.51×100=51.
You subtract the retail price from the original and you divide the number you get by the original price and then times the number by a hundred.
7. Mr. Grover bought a house for ₹30,00,000 in the year 2000. In 2004, the price of that house increased by 10%. In the year 2008, the price increased further by 20%. Calculate the price of the house at the end of 2008.
The price of the house at the end of 2008 will be 39,60,000
We must determine the price following each rise in order to determine the cost of the house at the end of 2008.
First of all, in 2004 the price jumped by 10%.
10% of 30,00,000 = 0.1 x 30,00,000 = 3,00,000
As a result, the house's new price in 2004 was:
30,00,000 + 3,00,000 = 33,00,000
The price then rose by 20% in 2008.
20% of 33,00,000 = 0.2 x 33,00,000 = 6,60,000
The home's total price at the end of 2008 was therefore: 33,00,000 + 6,60,000 = 39,60,000.
As a result, the house cost 39,60,000 at the end of 2008.
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For each of the parabolas, identify the following properties:
Be sure to lable the:
Vertex
Max/min value
Axis of symmetry
Zero(s)
Direction of opening
Y-intercept
The properties for parabolas 1 is:
Vertex: (-2, 1)Max/min value: minimum value is 1.Axis of symmetry: x = -2Zero(s): There are two zeros, at x = -4 and x = 0.Direction of opening: opens upwards.Y-intercept: (0, 5).Identify the properties?Parabola 1:
Vertex: (-2, 1)
Max/min value: The vertex represents a minimum point, so the minimum value is 1.
Axis of symmetry: x = -2
Zero(s): There are two zeros, at x = -4 and x = 0.
Direction of opening: The parabola opens upwards.
Y-intercept: The y-intercept is (0, 5).
Parabola 2:
Vertex: (1, -2)
Max/min value: The vertex represents a maximum point, so the maximum value is -2.
Axis of symmetry: x = 1
Zero(s): There are two zeros, at x = -1 and x = 3.
Direction of opening: The parabola opens downwards.
Y-intercept: The y-intercept is (0, -1).
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which type of exponential smoothing technique is best for data with a trend but no seasonality? triple exponential smoothing-winters exponential smoothing single exponential smoothing double exponential smoothing holt-winters exponential smoothing
Holt linear exponential smoothing or Holt-Winters exponential smoothing technique is best for data with a trend but no seasonality.
For trend but nonseasonal data, Holt linear exponential smoothing (aka double exponential smoothing) or Holt-Winters exponential smoothing (aka triple exponential smoothing) can be used to compare single exponential smoothing or Exponential smoothing is better than post-winter smoothing.
Holt's linear exponential smoothing method uses his two smoothing factors:
One for the level of the series and one for the trend. Suitable when data show a linear trend.
Holt-Winter exponential smoothing adds his third seasonal smoothing factor to Holt's linear exponential smoothing method. Appropriate when the data show trends over time and exhibit seasonal patterns. Therefore, Holt's linear exponential smoothing method is best when the data show a linear trend. Holt-Winters exponential smoothing is more appropriate when trends are more complex and there is evidence of seasonality.
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X + y + z = 6
-2x -y + z = -2
x - 2y - z = 4
The solution to the system of equations is [tex]x = 67/17 y = -42/17 z = -1[/tex].
What is a equation of line passes through the points (-6,6) and (-3,1)
Answer:
First find slope. m = (y2 - y1)/(x2 - x1) = (6 -1)/(-6 --3) = 5/-3. then. use. y - y1 =. m (x - x1). which gives. y - 1 = -5/3(x - 3)
Step-by-step explanation:
A line is perpendicular to y = 1/4x -8 and intersects the point (2,2). What is the equation of this perpendicular line y = [?]x + [?]
Answer:
y=-4x+10
Step-by-step explanation:
y = -4x + c
2 = -4*2 + c
2= -8+c
c= 10
y=-4x+10
Write a word phrase for the algebraic expression: h + 6
The word phrase for h + 6 is Six more h or the sum of six and h.
Converting algebraic expression to word phrase:
An algebraic expression is a mathematical phrase that uses variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division.
Converting an algebraic expression to a word phrase means expressing the mathematical expression in words.
This can be useful in situations where mathematical symbols may not be understood or when communicating mathematical concepts to someone who may not be familiar with them.
Here we have the expression h + 6
Where 6 is added to h
Hence,
The word phrase for h + 6 is Six more h or the sum of six and h.
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At the baseball game the Kacanich family purchased 3 hot dogs and 2 cheeseburgers and paid $31.25. The Nisbet family purchased 5 hot dogs and 2 cheeseburgers and paid $41.75. Write and solve a linear system to find the cost of each hot dog and each cheeseburger.
Let x be the cost of a hot dog and y be the cost of a cheeseburger. Then we can set up the following system of equations:
3x + 2y = 31.25
5x + 2y = 41.75
We can solve for one of the variables by subtracting the first equation from the second:
5x + 2y - (3x + 2y) = 41.75 - 31.25
2x = 10
x = 5
Substituting x = 5 into either of the equations above gives:
3(5) + 2y = 31.25
15 + 2y = 31.25
2y = 16.25
y = 8.125
Therefore, a hot dog costs $5 and a cheeseburger costs $8.125.
A picture farmer has a board 10 1/12 feet long. The farmer notices that 2 3/8 feet of the board is scratched and cannot be used. The rest of the board will be used to make small picture frames. Each picture frame needs 1 2/3 feet of the board. At most, how many complete picture frames can be made?
The farmer can make at most 3 complete picture frames with some usable board left over after subtracting the scratched portion and dividing the usable length by the length needed for each picture frame.
To find the amount of usable board, we need to subtract the scratched portion from the total length of the board:
101/12 - 23/8
Converting to a common denominator, we get:
122/12 - 19/8 = 976/96 - 228/96 = 748/96
Simplifying, we get:
72/96 feet
Now, we can divide this usable length by the length needed for each picture frame:
722/96 ÷ 1 2/3
Converting the mixed number to an improper fraction, we get:
722/96 ÷ 5/3 = 748/96 ÷ 5/3 = 748/96 x 3/5 = 3.9
Therefore, the farmer can make at most 3 complete picture frames with some usable board left over.
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If f (x) = √2x + 4 and g(x) = 1/2(x-4)², what is f(g(x))?
If f (x) = √2x + 4 and g(x) = 1/2(x-4)² then the function is f(g(x)) = √2 * (x-4) * √[1 + 2/[(x-4)²]]
What is function?
An expressiοn, rule, οr law in mathematics that specifies the relatiοnship between an independent variable and a dependent variable (the dependent variable). In mathematics and the sciences, functiοns are fundamental fοr cοnstructing physical relatiοnships.
This relatiοnship is typically represented as y = f(x), οr "f οf x," and y and x are related such that fοr each value οf x, there is a specific value οf y. This means that f(x) can οnly have οne value fοr a given x. In set theοry jargοn, a functiοn cοnnects an element x tο an element f(x) in anοther set. The set οf x values is referred tο as the dοmain οf the functiοn, and the set οf f(x) values prοduced by the values in the dοmain are referred tο as the range οf the functiοn.
[tex]f(g(x)) = \sqrt{[2g(x) + 4]}[/tex]
Now we can substitute the expression for g(x):
[tex]f(g(x)) = \sqrt{[2(1/2(x-4)²) + 4]}[/tex]
We can simplify this expression by first expanding the square in the brackets:
[tex]f(g(x)) = \sqrt{[2(x-4)^2 + 4]}[/tex]
Then we can factor out the 2 from the square:
[tex]f(g(x)) = \sqrt{[2(x-4)²] * √[1 + 2/[(x-4)²]]}[/tex]
Simplifying further:
[tex]f(g(x)) = \sqrt{2 * (x-4) * \sqrt{[1 + 2/[(x-4)²]}]}[/tex]
Therefore, [tex]f(g(x)) = \sqrt{2 * (x-4) * \sqrt{[1 + 2/[(x-4)²]}]}[/tex]
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Basic Trinomials. (Check for GCF)
x^3 + 16x^2 + 64x
Answer:
x^3 + 16x^2 + 64x First, we need to check if there is a greatest common factor (GCF) that we can factor out. In this case, we can factor out "x" since it is a common factor in all the terms: x(x^2 + 16x + 64) Now, we need to factor the quadratic trinomial inside the parentheses. We can do this by finding two numbers that multiply to 64 and add up to 16. These numbers are 8 and 8: x(x + 8)(x + 8) Therefore, the factored form of the trinomial expression is: x(x + 8)^2 I hope this helps!
0 / 350
a and b are two events. the notation for conditional probability is p(b|a).which notation is the probability of two events being independent?
The notation of the probability of two events being not independent is option (c) P(B|A) = P(B)
The notation for the probability of two events being not independent is P(B|A) ≠ P(B).
None of the options presented directly corresponds to this notation. However, we can use the concept of independent events to determine the probability of two events being not independent.
If two events A and B are independent, then P(B|A) = P(B). Therefore, if P(B|A) ≠ P(B), then A and B are not independent.
P(B|A) = P(B), which represents the probability of B given A assuming that A and B are independent events.
Therefore, the correct option is (c) P(B|A) = P(B)
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The given question is incomplete, the complete question is:
A and B are two events. The notation for conditional probability is P(B|A).
Which notation is the probability of two events being not independent?
a. P(B|A) = P(A and B) / P(A)
b. P(B|A) = P(A) / P(B)
c. P(B|A) = P(B)
d. P(B|A) = P(B) / P(A)
Find the value of x. (Please)
Answer:
x = 11
Step-by-step explanation:
35 + 5x = 90
5x = 55
x = 11
6. The function h is of the form y = ax² + c. Circle the following statement(s) that must be true
if a and c are both less than 0.
A. The graph of h will be reflected over the x axis.
B. The graph of h will be shifted left c units.
C. The vertex of h will be at (0, c).
D. The graph of h will be narrower than the quadratic parent function.
If a and c are both less than 0, the following statements must be true:
A. The graph of h will be reflected over the x-axis.
C. The vertex of h will be at (0, c).
how to Explanation each term ?Statement A is true because a negative value for "a" causes the parabola to open downwards, which reflects the graph over the x-axis.
Statement C is true because the x-coordinate of the vertex is always -b/2a, which in this case is -0/2a = 0, and the y-coordinate is "c", so the vertex is at (0,c).
Statement B is not necessarily true, as the sign of "c" does not affect the horizontal shift of the graph. If "c" were positive, the graph would shift downwards instead of upwards, but it would still be centered at x=0.
Statement D is not necessarily true, as the sign of "a" determines whether the graph is wider or narrower than the parent quadratic function. A negative value of "a" makes the graph narrower than the parent function, while a positive value of "a" makes it wider.
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