Given the shown triangle
Using cosine laws
\(c^2=a^2+b^2-2abcos(C)\)\(c^=\sqrt{a^2+b^2-2abcos(C)}\)where
b=
\(b=\frac{21sin(81)}{sin(9)}\)\(b=132.59\)then
\(c=\sqrt{a^2+b^2-2abcos(C)}\)\(c=\sqrt{21^2+132.59^2-2(21)(132.59)cos(90)}\)\(c=134.24\)WS= 134.24
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answer all 3!!!!
easy brainliest!!
Answer:
Step-by-step explanation:
1) DE = 6/sin63 = 6.7
DF = 6/tan63 = 3.1
m∠E = 180 - 90 - 63 = 27°
2) tan30 = 1/√3 = UV / (27√10)
UV = (27√10) / √3 · (√3/√3) = (27√30) / 3 = 9√30
3) cosV = 3/8
cos⁻¹(3/8) = 68
m∠V = 68°
A linear function always increases
-true
-false
Answer: False
Step-by-step explanation:
If the function has a negative slope, then it will decrease.
problem 7-14 the probability distribution for the number of defective items in a random sample is as follows:
x p(x)
0 1
1 0.15
2 13
3 07
4 0.55
calculate
expected value of x =
variance of x=
standard deviation for x=
a) Expected value of x = 2.82
b) Variance of x = 4.4732
c) Standard deviation for x = 2.1145
To find the expected value of x, we need to multiply each value of x by its corresponding probability and then sum the results
E(x) = (0)(1) + (1)(0.15) + (2)(0.13) + (3)(0.07) + (4)(0.55)
= 0 + 0.15 + 0.26 + 0.21 + 2.2
= 2.82
Therefore, the expected value of x is 2.82.
To find the variance of x, we need to first find the squared deviations of each value of x from the expected value
(0 - 2.82)^2(1) + (1 - 2.82)^2(0.15) + (2 - 2.82)^2(0.13) + (3 - 2.82)^2(0.07) + (4 - 2.82)^2(0.55)
= 8.4961
Then, we can calculate the variance as the weighted average of these squared deviations, using the probabilities as weights
Var(x) = 8.4961/1.9
= 4.4732
Therefore, the variance of x is 4.4732.
Finally, the standard deviation of x is the square root of the variance
SD(x) = sqrt(4.4732)
= 2.1145
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What is the decimal form of 120%?
12.0
1.20
Answer:
1.20
Step-by-step explanation:
120% is 120/100 and that equals 1.20 another way is to just remember that when you have a percent of a number and you need to put it in decimal form move the decimal place to the left twice.
i hope this helps!
Answer:
Step-by-step explanation:
1.2
The graph compares the weights in pounds of 100 dogs and cats that are brought in
to a veterinarian's office. Using the medians, how much more does a typical dog weigh than a typical cat?
Answer:20
Step-by-step explanation:this is wrong
Answer:
40
Step-by-step explanation:
subtract median of dogs and median of cats
Your neighbor has a bag with 5 oranges and 7 apples in it. You will be receiving two pieces of fruit from your neighbor. What is the probability, in percent, that you will receive 2 apples, assuming she removes them from the bag in random order
Answer:
31.82% probability that you will receive 2 apples.
Step-by-step explanation:
The fruits are removed from the bag, which means that the hypergeometric distribution is used to solve this question.
Hypergeometric distribution:
The probability of x sucesses is given by the following formula:
\(P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}\)
In which:
x is the number of sucesses.
N is the size of the population.
n is the size of the sample.
k is the total number of desired outcomes.
Combinations formula:
\(C_{n,x}\) is the number of different combinations of x objects from a set of n elements, given by the following formula.
\(C_{n,x} = \frac{n!}{x!(n-x)!}\)
In this question:
5 + 7 = 12 total fruits, which means that \(N = 12\)
7 apples, which means that \(k = 7\)
You receive 2 fruits, which means that \(n = 2\)
What is the probability, in percent, that you will receive 2 apples, assuming she removes them from the bag in random order?
This is, as a proportion, P(X = 2). So
\(P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}\)
\(P(X = 2) = h(2,12,2,7) = \frac{C_{7,2}*C_{5,0}}{C_{12,2}} = 0.3182\)
0.3182*100% = 31.82%
31.82% probability that you will receive 2 apples.
Homework part2 need help asap
The key features of the given quadratic functions are listed below.
What is the graph of a quadratic function?In Mathematics and Geometry, the graph of any quadratic function would always form a parabolic curve because it is a u-shaped. Based on the first quadratic function, we can logically deduce that the graph is an upward parabola because the coefficient of x² is positive and the value of "a" is greater than zero (0) i.e 3 > 0.
For the quadratic function y = 3x² - 5, the key features are as follows;
Axis of symmetry: x = 0.
Vertex: (0, -5).
Domain: [-∞, ∞]
Range: [-5, ∞]
For the quadratic function y = -2x² + 12x - 15, the key features are as follows;
Axis of symmetry: x = 3.
Vertex: (3, 3).
Domain: [-∞, ∞]
Range: [-∞, 3]
For the quadratic function y = -x² + 1, the key features are as follows;
Axis of symmetry: x = 0.
Vertex: (0, 1).
Domain: [-∞, ∞]
Range: [-∞, 1]
For the quadratic function y = 2x² - 16x + 30, the key features are as follows;
Axis of symmetry: x = 4.
Vertex: (4, -2).
Domain: [-∞, ∞]
Range: [-2, ∞]
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Use the given graph of f to find a number such that if 0 < |x − 3| < then |f(x) − 2| < 0.5.
Answer:
x=3, = -2
Step-by-step explanation:
divide 405 in the ratio 4:11
Step-by-step explanation:
Answer is in the photo
Hope it helllps
Good luck
The division of the number 405 in the ratio 4:11 is 297 and 108 respectively.
What are ratios and proportions?An ordered pair of numbers a and b, represented as a / b, is a ratio if b is not equal to 0. A proportion is an equation that sets two ratios at the same value. The numerical relationship between two values demonstrates how frequently one value contains or is contained within another.
Given that the ratio is 4:11. the number is 405 which has to be divided by the ratio.
Let the common ratio between the numbers is x. Form an equation and solve for x.
4x + 11x = 405
15x = 405
x = 405 / 15
x = 27
The numbers are,
4x = ( 4 x 27 ) = 108
11x = ( 11 x 27 ) = 297
Therefore, the division of the number 405 in the ratio 4:11 is 297 and 108 respectively.
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Which of the following expressions is equivalent to: 4x-12 *
16x
O
-8x
4(x-3)
O
4 + X-12
O
4(x-12)
Answer:
4(x - 3)
Step-by-step explanation:
4x = 4 * x
12 = 4 * 3
GCF = 4
4x - 12 = 4*x - 4*3
= 4(x - 3)
the second one.
............................
22) Two students are taking a math test. After 5 minutes, one student is done 1/3 and the
other is 2/8 done. How much ahead of the second student is the first?
Answer:
1/12Step-by-step explanation:
We need to find the difference in progress:
1/3 - 2/8 = 1/3 - 1/4 =4/12 - 3/12 = 1/12The first student is 1/12 ahead
what is inequalities
Inequalities are used in various branches of mathematics, as well as in real-world applications such as economics, physics, and social sciences, to describe relationships, make comparisons, and analyze data.
Inequalities are mathematical statements that describe a relationship between two values or expressions, indicating that one is greater than, less than, or not equal to the other. Inequalities are used to compare quantities and express their relative sizes or order.
The most common symbols used in inequalities are:
">" (greater than): indicates that the value on the left side is larger than the value on the right side.
"<" (less than): indicates that the value on the left side is smaller than the value on the right side.
"≥" (greater than or equal to): indicates that the value on the left side is greater than or equal to the value on the right side.
"≤" (less than or equal to): indicates that the value on the left side is less than or equal to the value on the right side.
"≠" (not equal to): indicates that the values on both sides are not equal.
Inequalities can be represented using variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. Solutions to inequalities are often expressed as intervals or sets of values that satisfy the given inequality.
Inequalities are used in various branches of mathematics, as well as in real-world applications such as economics, physics, and social sciences, to describe relationships, make comparisons, and analyze data.
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plz do all correct for brainiest
Answer:
1. Ninguna
2. Ningunas
3. Ningún
4. Algunos
5. Algunas
6. Ninguno
7. Algunas
8. Algún
1. Nadie va al laboratorio.
2. Ella nunca presta atención.
3. No aprende nada de memoria.
4. No hay ningunas sillas en la sala.
5. Nunca llevas el carnet de identidad.
Step-by-step explanation:
Order of Operation 22-8+2-5+2
Answer:
1. 22 - 8 = 14
2. 14 + 2 = 16
3. 16 - 5 = 11
4. 11 + 2 = 13
Answer: 13 and steps above
Step-by-step explanation:
Answer:
5
Step-by-step explanation: Use PEMDAS, you do addition and then subtraction first because A is before S. When you solve it you have to go from left to right.
22 - 8 + 2 - 5 + 2 =
8 + 2 = 10
22 - 10 - 5 + 2 =
5 + 2 = 7
22 - 10 - 7 =
22 - 10 = 12
12 - 7 = 5
I hopr this helps! Have a great day!
A gamer is observing her score, y, as she plays a video game. She currently has 2,500 points and is gaining 300 points for every minute, x, she plays. Which of the following equations can be used to describe this linear relationship? y = 300x − 2,500 y = 300x + 2,500 y = 2,500x − 300 y = 2,500x + 300
The linear equation that describes this situation is:
y = 2500 + 300*x
Which of the following equations can be used to describe this linear relationship?A general linear equation is written as:
y = ax + b
where a is the slope and b is the initial value.
Here we know that she starts with 2,500 points in the game, and then she wins 300 points for every minute.
Then the initial value is 2,500, and the slope is 300, then we can write the linear equation:
y = 2500 + 300*x
That is the correct option.
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PLEASE HELP ME I NEED IT ASAP PLEASE
B=
C=
Answer:
b=133 degrees
c= 47 degrees
Step-by-step explanation:
If you need an explanation, I will put it in the comments.
Which two numbers have a product of −18 and a sum of −7?
Answer:
2 and -9
Step-by-step explanation:
2 times -9 is -18
2 plus -9 is -7
Hope this helped!
Part A (4 pt): Fill in the missing steps to solve the
inequality. 2x+2/+428
-4-4
√x+25.
2
xs
2
XS
√x+2
+2 2.
1x2 2
(0) (0)²2
-2 -2
Question 7
Part B (2 pt): Draw the solution to the equation
on the number line provided. (Remember to
Include
your open/closed dots)
-24-20-16-12-8 -4 0 4 8 12 16 20 24
C
The solution to the inequality is: x <= -8 or x >= -8 and [-24, -11] U [7, 24] for number line.
What is inequality?
An inequality is a mathematical statement indicating that one expression is less than or greater than another expression. It involves the use of inequality symbols such as <, >, ≤, or ≥ to compare two values.
|(1/4)x + 2| + 4 >= 8
First, we isolate the absolute value term on one side by subtracting 4 from both sides:
|(1/4)x + 2| >= 4
Next, we split the inequality into two cases: one where the quantity inside the absolute value is positive, and one where it is negative:
(1/4)x + 2 >= 0 or (1/4)x + 2 <= 0
Solving for x in each case, we get:
(1/4)x >= -2 or (1/4)x <= -2
x >= -8 or x <= -8
Therefore, the solution to the inequality is:
x <= -8 or x >= -8
Or, in interval notation:
(-∞, -8] U [-8, ∞)
B. -24 -20 -16 -12 -8 -4 0 4 8 12 16 20 24
And the solution would be:
[-24, -11] U [7, 24]
The closed dot at -24 indicates that -24 is included in the solution, while the open dot at -11 indicates that -11 is not included.
The closed dot at 7 indicates that 7 is included, while the closed dot at 24 indicates that 24 is included in the solution.
Therefore, the solution to the inequality is: x <= -8 or x >= -8 and [-24, -11] U [7, 24] for number line.
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Please look at the pic and help!!
Answer:
4x² + 22x - 12
Step-by-step explanation:
A = bh/2
A = (4x - 2)(2x + 12)/2
A = (8x² + 48x - 4x - 24)/2
A = (8x² + 44x - 24)/2
A = 4x² + 22x - 12
A rectangular school yard is 96 meters wide and 178 meters long. What is its perimeter?
Answer: 69 square meters
Step-by-step explanation:
What is the meaning of "\( \varphi (x,y)\) be \( y\wedge \phi (x)\) "?
The given passage provides a proof that the Separation Axioms follow from the Replacement Schema.
The proof involves introducing a set F and showing that {a: e X : O(x)} is equal to F (X) for every X. Therefore, the conclusion is that the Separation Axioms can be derived from the Replacement Schema.In the given passage, the author presents a proof that demonstrates a relationship between the Separation Axioms and the Replacement Schema.
The proof involves the introduction of a set F and establishes that the set {a: e X : O(x)} is equivalent to F (X) for any given set X. This implies that the conditions of the Separation Axioms can be satisfied by applying the Replacement Schema. Essentially, the author is showing that the Replacement Schema can be used to derive or prove the Separation Axioms. By providing this proof, the passage establishes a connection between these two concepts in set theory.
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The city council voted on a new tax. 38 council members voted in favor of the tax. The council has 76 members. What percentage of the council members voted in favor of the tax
The percentage of the council members who voted in favor of the tax is 50%.
What is the percentage?The percentage is a ratio that can be expressed as a fraction of 100.
Given that, the council has 76 members out of which 38 members voted in favor of the tax.
The percentage amount of members who favor the tax is:
(38/76) × 100%
= 50%
Hence, the percentage of the council members who voted in favor of the tax is 50%.
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calculate the volume of each cone. Use 3.14 for π. Round answers to the nearest hundredth if necessary.
Answer:
πr of length
»» 3.14 x (5)²
»» 3.14 x 30 = 94.2cm²
πr of base
»» 3.14 x (4)²
»» 3.14 x 16 = 50.24cm²
Length x base
»» 94.2cm² x 50.25cm²
A= 4733.55cm²
\(\color{yellow}{}\)\(\color{yellow}{}\)\(\color{yellow}{}\)\(\color{yellow}{}\)\(\color{yellow}{}\)
Three forces of 3 N, 4 N, and 5 N act on an object so that the object is inequilibrium. Determine the angle between the largest and smallest forces.
Explanation
In solving the question, we will make use of the law: Triangle of forces
The triangle law of forces can also be stated as, if a body is in equilibrium under the action of three forces acting at a point, then the three forces can be completely represented by the three sides of a triangle taken in order.
So in our case, we will have the sketch
Solving for the angle, we will have
\(tan\theta=\frac{4}{5}\)\(\begin{gathered} \theta=\tan^{-1}(\frac{4}{5}) \\ \theta=38.66^0 \end{gathered}\)The angle between the largest and the smallest forces is 38.66 degrees
what is 3 2/3- 1 4/5
The answer to the Mixed fraction 3 2/3- 1 4/5 is 1 13/15
What is a fraction?A fraction is a part of a whole. In arithmetic, the number is expressed as a quotient, in which the numerator is divided by the denominator
Converting the mixed fraction 3 2/3- 1 4/5 to an improper fraction.
= 11/3 - 9/5
Using the denominator of 3 and 5
= \(\frac{\frac{11}{3}-\frac{9}{5} }{15}\)
= \(\frac{55-27}{15}\)
Simplifying the numerator
=28/15
converting to mixed fraction
hence the result of the mixed fraction 3 2/3- 1 4/5 is 1 13/15
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You want to make a banner that says HAPPY BIRTHDAY. You want the letters to be 3 inches high. You make a sketch of the banner with letters that are 2 inches high. The length of the phrase in your sketch is 20 inches long. What length of paper should you buy to make the banner?
Answer:
30 inches
Step-by-step explanation:
Assuming the banner you want is similar to the sketch you made, the length of the banner is 10 times the letter height.
For 3-inch letters, the banner length will be 30 inches.
Answer:
30 ft
Step-by-step explanation:
**According to the image of the banner, the banner should be 3 foot high (not 3 inches)**
Create a ratio of letter height to length of phrase for the sketch and the banner. Let x be the length of the banner.
NB There is no need to convert the measurements between inches and feet, since the letter height and length of phrase is measured in the same way for each banner.
Ratio: letter height : length of phrase
Sketch (in inches): 2 : 20
Banner (in feet): 3 : x
Equate the ratios and solve for x:
\(\sf \implies 2 : 20 = 3 : x\)
\(\sf \implies \dfrac{2}{20}=\dfrac{3}{x}\)
\(\sf \implies 2x=3 \cdot 20\)
\(\sf \implies 2x=60\)
\(\sf \implies x=\dfrac{60}{2}\)
\(\sf \implies x=30\)
Therefore the length of paper your should buy to make the banner is 30ft.
Determine the general solution of 5 tan 0-6 cos 0 = 0
The general solution for the equation 5tan(θ) - 6cos(θ) = 0 is:
θ = sin⁻¹(2/3) + nπ, where n is an integer.
To determine the general solution of the trigonometric equation 5tan(θ) - 6cos(θ) = 0, we can use algebraic manipulation and trigonometric identities to simplify and solve for θ.
Starting with the given equation:
5tan(θ) - 6cos(θ) = 0
First, we can rewrite the tangent function in terms of sine and cosine:
5(sin(θ)/cos(θ)) - 6cos(θ) = 0
Next, multiply through by cos(θ) to eliminate the denominator:
5sin(θ) - 6cos²(θ) = 0
Using the identity sin²(θ) + cos²(θ) = 1, we can express cos²(θ) as 1 - sin²(θ):
5sin(θ) - 6(1 - sin²(θ)) = 0
Expanding and rearranging terms:
5sin(θ) - 6 + 6sin²(θ) = 0
Rearranging the equation:
6sin²(θ) + 5sin(θ) - 6 = 0
Now, we have a quadratic equation in terms of sin(θ).
We can solve this quadratic equation by factoring or using the quadratic formula.
However, since this equation is not easily factorable, we will use the quadratic formula:
sin(θ) = (-b ± √(b² - 4ac)) / 2a
For our equation:
a = 6, b = 5, c = -6
Plugging these values into the quadratic formula and simplifying, we get:
sin(θ) = (-5 ± √(5² - 4(6)(-6))) / (2(6))
sin(θ) = (-5 ± √(25 + 144)) / 12
sin(θ) = (-5 ± √169) / 12
sin(θ) = (-5 ± 13) / 12.
This gives us two possible solutions for sin(θ):
sin(θ) = (13 - 5) / 12 = 8/12 = 2/3
sin(θ) = (-13 - 5) / 12 = -18/12 = -3/2
Since the range of the sine function is -1 to 1, the second solution (-3/2) is not valid.
Now, to find the values of θ, we can use the inverse sine function (sin⁻¹) to solve for θ:
θ = sin⁻¹(2/3)
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A builder is buying property where she can build new houses the line plot shows the size of the lights for each house which is the average size of the lots
Answer:
Step-by-step explanation:
13,000
Darwin's age is 6 years greater than twice fiona's age.If darwin is 50 years old, how many years old is fiona
Answer:
22years old
Step-by-step explanation:
Let Fiona's age = x
Darwin age
2x+6 = 50
2x = 50 -6
2x = 44
x= 44/2
x = 22years old
What will happen if pressure is increased?
The equilibrium will shift right.
The equilibrium will shift left.
The equilibrium will not change.
Answer: The equilibrium will shift right.
Answer:
the equilibrium will shift towards the side