If cosine of x degrees equals three-fifths, what is the value of b?

triangle LMN in which angle M measures 90 degrees, angle L measures x degrees, LN measures 20 units, and LM measures 3b units

b = 4
b = 5
b = 6
b = 7

Answer:

20%

Step-by-step explanation:

2+8=10

10*10=100

2*10=2

Please can you give me brainliest?

Answer:

x = 45/2 or 22.5

Step-by-step explanation:

Since we are given CDE ~ KLM, we know that C is similar to K, D is similar to L, and E is similar to M. The problem asks to find DE, so by comparison, it is known that DE is similar to LM.

From the two triangles, KM is similar to CE, and we can see that the ratio between the two is 8:15. We are given LM, which is 12, so we can find x using this equation to compare the smaller triangle to the bigger one:

KM/CE = LM/DE

Plug in your given values:

8/15 = 12/x

Find x:

x = 45/2 or 22.5

The solution to y+6 =- 3y-26 is 8.

The solution to the equation y+6 =- 3y-26 is to solve for y. This can be done by rearranging the equation and combining like terms. The equation can be rearranged to -3y-y+6 = -26.

Combining the like terms yields -4y+6 = -26.

To solve for y, subtract 6 from both sides.

These yields -4y = -32.

Finally, divide both sides by -4 to obtain y = 8.

Therefore, the solution to the equation y+6 =- 3y-26 is y = 8.

Understanding the solution to an equation is a critical part of algebra and can be used to solve a variety of problems. There are many methods for solving equations, and it is important to understand each type and how to employ them appropriately. Solving equations like y+6 =- 3y-26 requires rearranging the equation and combining like terms to obtain the solution. Once the equation is in a simpler form, the solution can be found by applying basic math operations.

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After six​ months, the​ subjects' symptoms are studied and compared. Answer parts​ are given below.

An assumption or concept is given as a hypothesis for the purpose of debating it and testing if it might be true.

Given:

A pharmaceutical company wants to test the effectiveness of a new allergy drug.

The company identifies 250 females​ 30–35 years old who suffer from severe allergies.

The subjects are randomly assigned into two groups.

One group is given the new allergy drug and the other is given a placebo that looks exactly like the new allergy drug.

After six​ months, the​ subjects' symptoms are studied and compared.

Here, 30-35 year-old girls are used to test the new allergy medication's effects.

(a)

Females between the ages of 30 and 35 who are the test subjects are the experimental units.

The new allergy medication, whose results are being studied, is the remedy.

It's best to choose C.

(b)

A bias may develop if a researcher or patient knows whether subjects received a medication or a placebo.

In this case, choice B is preferable.

(c)

If neither the researcher nor the subject knew whether they were receiving a medicine or a placebo, the study would be considered double-blind.

In this case, choice A is preferable.

Therefore, all the correct choices are given above.

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The complete question is given in the image.

The possible values of k for the quadratic equation 9x² - 5kx + 1 = 0 has equal roots are 6/5 and -6/5.

The standard form of an quadratic equation is, ax² + bx + c = 0, a ≠ 0 and a,b,c --> constants. The quadratic formula for solution of above equation is, x = ( - b ±√b² - 4ac)/2a , where Discriminate, D is equals to b² - 4ac . We have an quadratic equation, 9x² - 5kx + 1 = 0 --(*)

Step 1 : Determining the discriminant of the quadratic equation : After comparing the equation (*) with standard one , a = 9 , b = - 5k and c = k . So, discriminate formula , D = b² - 4ac

=> D = (- 5k)² - 4×9×1

=> D = 25 k² - 36

Step 2: Determining the values of k : We have equation (*) has equal roots then according to the nature of the roots of an quadratic equation When the value of discriminant, D = 0, then the quadratic equation has real and equal roots.

So, 25 k²- 36 = 0

=> 25 k² = 36

=> k² = 36/25

=> k = ±√36/25

=> k = ± 6/5

Hence, the values of k are ± 6/5.

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Complete question:

For what values of k is the quadratic equation 9x² - 5kx + k = 0, has equal roots?

The probability that a randomly chosen unsatisfactory screen came from Philips is approximately 0.4444.

What is probability ?

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true.

Let's call the probability that a screen came from Philips "P".

know that 55% of the screens came from Corning Inc. and the rest came from Philips, so:

P = 1 - 0.55 = 0.45

We also know that the probability of getting an unsatisfactory screen from Corning Inc. is 1%, while the probability of getting an unsatisfactory screen from Philips is 4%:

P(unsatisfactory | Corning Inc.) = 0.01

P(unsatisfactory | Philips) = 0.04

Using Bayes' theorem, the probability that a randomly chosen unsatisfactory screen came from Philips can be calculated as:

P(Philips | unsatisfactory) = P(unsatisfactory | Philips) * P(Philips) / [P(unsatisfactory | Philips) * P(Philips) + P(unsatisfactory | Corning Inc.) * P(Corning Inc.)]

Substituting the values we have:

P(Philips | unsatisfactory) = 0.04 * 0.45 / [0.04 * 0.45 + 0.01 * 0.55] = 0.444444... or approximately 0.4444

Therefore, the probability that a randomly chosen unsatisfactory screen came from Philips is approximately 0.4444.

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The probability that a randomly chosen unsatisfactory screen came from Philips is 46.48%.

Let's call P(Philips) the probability that a randomly chosen screen came from Philips, and P(Unsatisfactory | Philips) the probability that a screen is unsatisfactory given that it came from Philips. Then we can use Bayes' theorem to find P(Philips | Unsatisfactory), the probability that a screen came from Philips given that it is unsatisfactory.

Bayes' theorem states:

P(A | B) = P(B | A) * P(A) / P(B)

where A and B are events, P(A | B) is the conditional probability of A given B, P(B | A) is the conditional probability of B given A, P(A) is the probability of A, and P(B) is the probability of B.

In this case,

A = "the screen came from Philips"

B = "the screen is unsatisfactory"

So:

P(Philips | Unsatisfactory) = P(Unsatisfactory | Philips) * P(Philips) / P(Unsatisfactory)

We are given:

P(Unsatisfactory | Philips) = 4% = 0.04

P(Philips) = 45% = 0.45 (since 55% came from Corning Inc.)

P(Unsatisfactory) = P(Unsatisfactory | Corning Inc.) * P(Corning Inc.) + P(Unsatisfactory | Philips) * P(Philips)

= 1% * 55% + 4% * 45% = 0.55% + 1.8% = 2.35%

So:

P(Philips | Unsatisfactory) = 0.04 * 0.45 / 0.0235 = 46.48%

So the probability that a randomly chosen unsatisfactory screen came from Philips is 46.48%.

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A data set which could be represented by the boxplot shown include the following: A. {6, 6, 8, 8, 9, 12, 13, 13, 14}.

In Mathematics, a box plot is sometimes referred to as box-and-whisker plot and it can be defined as a type of chart that can be used to graphically or visually represent the five-number summary of a data set with respect to locality, skewness, and spread.

Based on the information provided above, the five-number summary for the given data set include the following:

For the median, we have:

Median = 6, 6, 8, 8, 9, 12, 13, 13, 14

Median = 9.

In conclusion, we can logically deduce that the median of the given data set is equal to 9 while the first quartile is 7 and the third quartile is 13.

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Answer: 30 percent of 85 is 25.5

Answer:

the answer is 25.5

Step-by-step explanation:

this is because 85 in our question is equivalent to thus you just need to cross multiply

Answer:

x = 17, y = 8

Step-by-step explanation:

Answer:

y-8

X-17

Step-by-step explanation:

Look at the ratio. If BC is 2x of ZY, then multiply the sides of XZ and YX by 2

Answer: a and c

Step-by-step explanation:

The Nia's average daily balance in this billing cycle was equals to the $432.85. So, correct choice is option(D).

Nia wants to check whether the finance charge applied in her credit card statement is correct or not. For this she made a table to do this calculation. The billing cycle is 31 days is present in above figure. We have to calculate the Nia's average daily balance in billing. Average daily balance of Nid is represented by:

Average mean = (Days x Balance)/Total Number of days

So, Days × balance = (745.0 x 7) + (1555. 15 × 10) + (245.20 × 7) + (90.75 × 7)

= 5215 + 5851.5 +1716.4 + 635.25

= $13418.15

Total number of days = 7+ 10 + 7 + 7 = 31 days

Hence, the Average = 13418.15/31

= $432.84

Hence, required average daily balance is $432.84.

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The answers to the two blank portions are, √64 = 8 and ∛1000 = 10.

We are aware that there are two different sorts of radicals. Surds are created when a number is raised to a power that makes it greater than zero but less than one. Indices are created when a number is raised to a power that makes it bigger than one.

We know 10×10 = 100.

10¹×10¹ = 100.

10² = 100.

√100 = 10.

Similarly ∛1000 = 10.

As ∛1000 = ∛(10×10×10) = ∛10³ = 10.

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The range of a set of numbers is the difference between the maximum and minimum values in the set.  X range is a type of range chart used to identify patterns in data points over a period of time.

The Range of a dataset is determined by subtracting the smallest value from the largest value in that dataset, providing an indication of the total spread of the data points. Range is a useful metric for understanding the variability of data points and for comparing different datasets.

X Range is a type of range chart used to identify patterns in data points over a period of time. It is a graphical representation of the range of data points and can help to identify trends and seasonal patterns. X Range charts are particularly useful for understanding how data points fluctuate over time, and can be used to identify any outliers in the data that may require further investigation.

X Range charts can be used to identify any clusters of data points, and to compare different data sets. X Range charts are also useful for understanding the overall volatility of a dataset and for making predictions about future data points.

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The average temperature during the winter in the Arctic tundra i -34C which is also 93.2 degrees Fahrenheit

The difference between the freezing point of water and its boiling point at normal atmospheric pressure is divided into exactly 100 equal parts to determine the temperature in degrees Celsius (degrees). Water has a freezing point set at 0° and a boiling point set at 100°.

Therefore, a 100°C difference is precisely equivalent to a 180°F difference. As a result, each degree in Celsius is equivalent to 1.8 degrees Fahrenheit.

The 34 Celsius to Fahrenheit formula is a linear function:

[°F] = ([34] x 9 ⁄ 5) + 32.

Therefore, we get:

34 C to F = 93.2 °F

34 °C in °F = 93.2 Fahrenheit

34 C in F = 93.2 degrees Fahrenheit

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The 4 properties of multiplication are Associative Property, Commutative Property, Distributive Property, and Identity Property.

The properties of multiplication are particular rules that are used while multiplying numbers. These properties help simplify expressions easily and, hence, have a significant role in solving all kinds of mathematical expressions, whether algebraic expressions, fractions, or integers.

Associative Property: (P × Q) × R = P × (Q × R)

For example, (4 × 5) × 3 = 4 × (5 × 3) = 60.

Commutative Property: P × Q = Q × P

For example, 3 × 4 × 2 = 2 × 3 × 4 = 24.

Distributive Property: P(Q + R) = PQ + PR; P(Q - R) = PQ - PR

For example, 3(2 + 4) = (3 × 2) + (3 × 4) = 6 + 12 = 18.

Identity Property: P × 1 = P

For example, 4 × 1 = 4, or 1 × 27 = 27.

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Answer:

81 Bead in total

Ratio: 18:63

Step-by-step explanation:

2*9 = 18

7*9 = 63

The value of the expression is 32.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

50% of 88 - 33(1/3)% of 36

This can be written as,

= 50/100 x 88 - (100/3)/100 x 36

= 44 - 12

= 32

Thus,

The value is 32.

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The cost of 250 bricks, delivered to a worksite, is $170. The cost of 400 bricks delivered is $245 and the cost to have 320 bricks will delivered $217.6 .

The cost of 250 bricks, delivered to a worksite, is $170.

So , we can calculate the single brick cost need to divide 170/250=0.68

Single brick cost is 0.68

The cost of 400 bricks delivered is $245.  In this case a single brick cost is 0.6125

The answers is different from the first answer we can calculate  320  brick cost 320×0.68=217.6

The following equation is used to calculate the Cost Per Brick. To calculate the cost per brick, divide the total cost of the bricks by the number of bricks. Bricks in 1 cubic Feet (cft) = Volume of brickwork/ Volume of one brick with mortar. Thus, thumb rule formula: No. of bricks in wall per Cubic Feet= (Area in Cft × 14).

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Answer:

A

Step-by-step explanation:make brainiest

The distance, to the nearest foot, the plane has flown is 3926.887 feet.

Angles are the figure formed by the intersection of two lines or rays by sharing a common point. This point is called the vertex of the angle.

Angles are usually measured in degrees or radians

The horizontal runway, the distance plane flied and the height gained forms a right angled triangle.

Let x be the distance plane flied.

Height gained = 950 feet

Angle that plane makes with the horizontal runway = 14°

Sin 14 = Opposite side / Hypotenuse

Sin 14 = 950 / x

x = 950 / sin 14

x = 3926.887 feet

Hence the distance plane flied is 3926.887 feet.

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The hypotenuse square in a right-angled triangle is equal to the sum of the squares of the two shorter sides, according to the Pythagorean theorem.

Pythagoras, a Greek philosopher who was born around 570 BC, is honored in the name of the theorem. Perhaps more than any other mathematical theorem, the theorem has been demonstrated numerous times using a variety of techniques. There are many different types of proofs, some of which go back thousands of years, including both geometric proofs and algebraic proofs.

The Pythagorean relation holds true when Euclidean space is represented by a Cartesian coordinate system in analytical geometry: the squared distance between two points equals the sum of squares of the difference in each coordinate between the points.

[tex]c=\sqrt{ a2+b2}= \sqrt{ 3.92+82}=8.9[/tex]

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Every function has an inverse, but not every inverse will be a function.

A function takes a starting value, performs some operation on this value, and creates an output answer.

The inverse function takes the output answer, performs some operation on it, and arrives back at the original function's starting value.

An inverse relation is the set of ordered pairs obtained by interchanging the first and second elements of each pair in the original function.

A function is a one-to-one function if and only if each second element corresponds to one and only one first element.

Example:

consider the inverse of the function an f(x)=2x-4.

y=2x-4

x=y-4

x+4=y

f⁻¹(y)=x+4

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The value of the function ƒ(g(3)) is 239, when  ƒ(x) = x³ + 5x² − 2x − 1  and g(x) = x² – 4.

A function is an equation with just one solution for every value of y in the equation. A function pairs each input of a particular type with exactly one output.

Instead of y, it is typical to name functions f(x) or g(x). f(2) instructs us to calculate the value of our function when x is equal to 2.

We have given to find ƒ(g(3))

when ƒ(x) = x³ + 5x² − 2x − 1

and g(x) = x² – 4

When g(3) = (3)² – 4

= 9 - 4

= 5

For

ƒ(g(3)) = (5)³ + 5(5)² − 2(5) − 1

= 125 + 125 - 10 - 1

= 239

Thus, the value of the function ƒ(g(3)) is 239, when  ƒ(x) = x³ + 5x² − 2x − 1  and g(x) = x² – 4.

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The fraction of registered voter that did not participate was 2/5

Is a number that expresses the portion of some number over a total. The number that expresses the portion is known as the numerator and the number that expresses the total is known as the denominator.

To solve this exercise we have to perform a mathematical operation with fractions:

Information about the problem:

Calculating the fraction of the registered voter that did not vote we get:

No. did not participate = Total - Registered voter participated

No. did not participate = 1 - 3/5

No. did not participate = (5 - 3) /5

No. did not participate = 2/5

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The balance in the account of Jayden after 5 years will be $3,886.27.

A loan or deposit's interest is computed using the starting principle and the interest payments from the ago decade as compound interest.

We know that the compound interest is given as

A = P(1 + r)ⁿ

Where A is the amount, P is the initial amount, r is the rate of interest, and n is the number of years.

Jayden invests $2,644.93 in a retirement account with an interest rate of 8% compounded annually. Then the amount after 5 years is calculated as,

A = $2,644.93 x (1 + 0.08)⁵

A = $2,644.93 x (1.08)⁵

A = $2,644.93 x 1.469

A = $3,886.27

The balance in the account of Jayden after 5 years will be $3,886.27.

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Answer:

b =0nand a =0 simple beacaes3 0-0=0and 0+0=0

To solve the given system of equations using elimination method following steps need to follow:

Equate the coefficient in opposite sign by multiplying the equation by required number for the variable you want to eliminate.

As given in the question,

Steps required to solve the given system of equations by elimination method with multiplication:

To eliminate x-term equate the coefficient of x in opposite sign.

4x + 3y = 1  __(1)

3x + 4y = 1  __(2)

1. Multiply 3 to (1) and -4 to (2)  to eliminate the x-term.

12x + 9y = 3  __(3)

-12x - 16y = -4   __(4)

2. Now add (4) from (3)  and eliminate x-term.

12x + 9y = 3  

-12x - 16y = -4

0x -7y = -1

⇒ y = 1 / 7.

Therefore, solution of the system of equation using elimination method with multiplication is:

Equate the coefficient in opposite sign by multiplying the equation by required number for the variable you want to eliminate.

The above question is incomplete , the complete question is :

How do you solve systems of equations by elimination method with multiplication?.

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