Solve each system of equations by substitution. Clearly identify your solution.


y=3x+19

y=5x+33

The solutions to the cosine functions are x = π/3 + 2nπ or x = 5π/3 + 2nπ, where n is an integer and x = 3π/4 + 2nπ or x = 5π/4 + 2nπ, where n is an integer.

1. 2 cos x - 1 = 0

Adding 1 to both sides and dividing by 2, we get:

cos x = 1/2

This equation has solutions for x of π/3 and 5π/3 (plus any integer multiple of 2π, since the cosine function is periodic with period 2π).

Therefore, the solutions are:

x = π/3 + 2nπ or x = 5π/3 + 2nπ, where n is an integer.

2. 5 cos x + 3√2 = 3 cos x + 2√2

Subtracting 3 cos x and 2√2 from both sides, we get:

2 cos x = -√2

Dividing by 2, we get:

cos x = -√2/2

This equation has solutions for x of 3π/4 and 5π/4 (plus any integer multiple of 2π).

Therefore, the solutions are:

x = 3π/4 + 2nπ or x = 5π/4 + 2nπ, where n is an integer.

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The solution of the equation 1/2x² + 3/8x - 2 using completing the square method are: 1.66 or -2.41.

To solve the equation 1/2x² + 3/8x -2 using completing the square method, follow these steps:

Step 1: Move the constant term to the right-hand side

1/2x² + 3/8x = 2

Step 2: Multiply both sides by 2 to clear the fraction

x² + 3/4x = 4

Step 3: Add the square of half of the coefficient of x to both sides of the equation

x² + 3/4x + (3/8)² = 4 + (3/8)²

The left-hand side is now a perfect square, specifically (x + 3/8)².

Step 4: Simplify the right-hand side of the equation

x² + 3/4x + 9/64 = 256/64 + 9/64

x² + 3/4x + 9/64 = 265/64

Step 5: Take the square root of both sides

x + 3/8 = ±√(265)/8

Step 6: Solve for x

x = -3/8 ± √(265)/8

x = 1.66 or - 2.41

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Method of inverse of matrix is given:  

To obtain the inverse of the given matrix, M, without using the Matlab inv() command, you can use the following steps:

1. Compute the determinant of M, which is equal to 2.

2. Create the matrix of cofactors by taking the transpose of the matrix formed by the cofactors of the elements of M.

3. Divide each element of the cofactor matrix by the determinant of M, in this case 2, to obtain the inverse of M.

Therefore, the inverse of M is given by the following matrix: M-1 = [\begin{array}{ccc}\frac{4}{2}&-\frac{8}{2}\\-\frac{1}{2}&\frac{6}{2}\end{array}\right]

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To obtain 40g of active ingredient from a 100:1000 solution, you would need 400mL of the solution. The correct answer is option c. 400mL. A 100:1000 solution means that there are 100g of active ingredient in 1000mL of the solution. To find out how many milliliters of the solution you need to obtain 40g of active ingredient, you can use the following proportion:

100g/1000mL = 40g/x mL

Cross-multiplying gives:

100g * x mL = 40g * 1000mL

Simplifying and solving for x gives:

x = (40g * 1000mL)/100g

x = 400mL

Therefore, you would need 400mL of the 100:1000 solution to obtain 40g of active ingredient.

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The multiplied the binomials of

Multiplying binomials involves using the distributive property to multiply each term in one binomial by each term in the other binomial.

(i) 2a-9 and 3a+4
(2a-9)(3a+4) = 2a(3a) + 2a(4) - 9(3a) - 9(4) = 6a²+ 8a - 27a - 36 = 6a² - 19a - 36

(ii) x-2y and 2x-y
(x-2y)(2x-y) = x(2x) + x(-y) - 2y(2x) - 2y(-y) = 2x² - xy - 4xy + 2y² = 2x^(2) - 5xy + 2y²

(iii) kl+lm and k-l
(kl+lm)(k-l) = kl(k) + kl(-l) + lm(k) + lm(-l) = k^(2)l - kl²+ lmk - l²m = k²l - l²m - kl² + lmk

(iv) m²-n² and m+n
(m²-n²)(m+n) = m²(m) + m²(n) - n²(m) - n²(n) = m³ + m²n - mn² - n²

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Answer:

too blurry

Step-by-step explanation:

Answer:

false

Step-by-step explanation:

the pothagirum therum say that theres many reason its false

Answer: True

Step-by-step explanation:

True because we do not know the letters value, so in this case you only add the numbers 14 and 2. You will end up with the answer 16x after adding the letter/valuable.

The length of the arc XYZ is 59.3 inches .

The radius of the circle is 10 inches. The central angle that subtend the arc is 340 degrees.

Therefore, the length of the arc xyz can be found as follows:

length of an arc = ∅/ 360 × 2πr

where

length of an arc(xyz) = 340 / 360 × 2 × 3.14 × 10

length of an arc(xyz) = 21352 / 360

length of an arc(xyz) = 59.3111111111

length of an arc(xyz) = 59.3inches

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The common tangent of the compound curve is parallel to its long chord. This means that the angle between the common tangent and the long chord is 0°. The long chord makes an angle of 18° with the shorter tangent and 12° with the longer tangent. We can use the law of sines to determine the length of the common tangent.

Let's call the length of the common tangent x, the length of the long chord L, the angle between the common tangent and the long chord θ, the angle between the long chord and the shorter tangent α, and the angle between the long chord and the longer tangent β.

Using the law of sines, we have:

x/sin(θ) = L/sin(α+β)

Substituting the given values, we have:

x/sin(0°) = 546/sin(18°+12°)

Simplifying the equation, we get:

x = 546*sin(0°)/sin(30°)

Since sin(0°) = 0 and sin(30°) = 0.5, we have:

x = 546*0/0.5

x = 0

Therefore, the length of the common tangent is 0m.

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Answer: As the two cylinders have the same height, the cylinder with the greater radius will have the greater volume. Therefore, the statement "The cylinder with radius has a greater volume than the cylinder with radius /2" is true.

Step-by-step explanation:

Answer:

13,860 egyptian pounds

Answer:

Step-by-step explanation:

1 USD = 18.48 Egyptian pounds

∴ 750 USD = 750 × 18.48 Egyptian pounds

                  = 13860 Egyptian pounds

One possible set of values that would make the inequality true is:

g = 5

g = 0

g = -1

When we substitute these values into the inequality, we get:

4 + 5 ≥ 9 (true)

4 + 0 ≥ 9 (false)

4 + (-1) ≥ 9 (false)

Therefore, the values that make the inequality true are g = 5, g = 0, and g = -1.

The solution to the equation |9a+5|=68 is a = 7, -8.111. To solve the equation |9a+5|=68, we can use the property of absolute value that states that |x| = x or |x| = -x. This means that we can set up two equations to solve for a:

9a+5 = 68 or 9a+5 = -68

Now we can solve each equation separately:

9a+5 = 68
9a = 63
a = 7

9a+5 = -68
9a = -73
a = -8.111

So the solutions are a = 7 and a = -8.111. We can write these solutions separated by a comma as follows:

a = 7, -8.111

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a. The formula for the upper limit (U) is U = 220 - x, where x is the age of the person. The formula for the lower limit (L) is L = 0.65(220 - x).

b. For a 40-year-old person, the lower limit is L = 0.65(220 - 40) = 117 beats per minute and the upper limit is U = 220 - 40 = 180 beats per minute.

c. For a 60-year-old person, the lower limit is L = 0.65(220 - 60) = 104 beats per minute and the upper limit is U = 220 - 60 = 160 beats per minute.

d. Let x be the age of the younger woman and y be the age of the older woman. Since the older woman is 34 years older than the younger woman, we have y = x + 34. Since the older woman is working at the upper limit of her target heart rate zone and the younger woman is working at the lower limit of her target heart rate zone, we have U = L. Substituting the formulas for U and L, we get 220 - y = 0.65(220 - x). Substituting y = x + 34, we get 220 - (x + 34) = 0.65(220 - x). Simplifying and solving for x, we get x = 38. Therefore, the age of the younger woman is approximately 38 years and that of the older woman is approximately 72 years. Their pulse is approximately U = 220 - 72 = 148 beats per minute.

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Answer: I believe its A.

Step-by-step explanation:

Answer:

area=66

perimeter=42

Step-by-step explanation:

area = (12 x 3) + (5 x 6)

=36 + 30

=66

perimeter = 12 +9 +5 +6 +7 +5

=42

I think  it would be 56%

Answer:56.06%

Step-by-step explanation:

Divide 37 by 66 to get it in decimal form

37 ÷ 66 ≈0.5606

Then multiply the answer from the previous step by 100 to get an answer as %

0.5606 x 100 = 56.06%

The proof answer is correct by taking 56.06 % of 66 to get 37

(66 x 56.06) ÷ 100 ≈ 37

The equations that represent functions are:

  1) 2x + 3y = 10

  2) 3y = 18

Functions are relations which give a particular output for each input.  The characteristic that every input is associated with exactly one output defines a function as a relationship between a set of inputs and a set of allowable outputs. Specific input is supplied to a function in order to produce a specific result. To determine if a curve is a function or not, apply the vertical line test. Any curve that intersects a vertical line at more than one point is not a function.

Let us look into each equation.

1)  2x + 3y = 10

Here for each input of x, we get only one output y.

So this is a function.

2)  4x = 16

 This is not a function because there can be multiple values of y for a single value of x.

3) 2x − 3 = 14

 This is also not a function because there can be multiple values of y for a single value of x.

4)  3y = 18

 This is a function because there is only one value of y for exactly one value of x. Also, considering the vertical line test, the curve is a straight horizontal line which intersects with a given vertical line only once. So it is a function.

5)14.6 = 2x

  This is also not a function because there can be multiple values of y for a single value of x.

Therefore the equations that represent functions are:

  1) 2x + 3y = 10

  2) 3y = 18

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The equation for the line that passes through the point (-1,4) and that is parallel to the line with the equation y=2 is y=4.

To find the equation for the line that passes through the point (-1,4) and that is parallel to the line with the equation y=2, we need to use the concept of slope. The slope of a line is the ratio of the vertical change to the horizontal change between any two points on the line.

The equation y=2 is a horizontal line, which means that its slope is 0. Since the line we are looking for is parallel to this line, its slope will also be 0.

Now that we know the slope, we can use the point-slope form of an equation to find the equation of the line. The point-slope form of an equation is [tex]y-y1=m(x-x1)[/tex], where m is the slope and [tex](x1,y1)[/tex] is a point on the line.

Plugging in the values we know, we get:

[tex]y-4=0(x-(-1))[/tex]

Simplifying the equation, we get:

[tex]y-4=0[/tex]

Adding 4 to both sides of the equation, we get:

[tex]y=4[/tex]

So the equation for the line that passes through the point (-1,4) and that is parallel to the line with the equation y=2 is [tex]y=4[/tex].

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The inequality's solution set can be described by inspection as x <= 8.

Inequality is the unequal treatment of people based on factors such as race, gender, class, or other social characteristics. It is often seen as unfair and can lead to social and economic disparities.

This is because the inequality (x-8)^(6)<=0 is asking when the quantity (x-8) raised to the 6th power is less than or equal to zero.

Since any number raised to an even power will always be positive or zero, the only way for this inequality to be true is when (x-8) is equal to zero. This occurs when x = 8. Therefore, the solution set is x <= 8.

To summarize, the inequality's solution set is:
x <= 8

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The equation of the graph of the function g(x) is -√(x-7).

Turns are frequently used to refer to reflection, which is when an object is flipped over a line without affecting its size or shape. The preimage is flipped over a line in a rigorous transition known as a reflection, but its size and shape are left unchanged. Flips is another name for reflections.

A figure can be translated if it is moved in any direction without altering its size, form, or orientation. A hard transformation called a translation alters the preimage's position but not its size, shape, or orientation. Slides are another name for translations.

Given that, f(x)= square root of x, that is:

f(x) = √x

Reflect the graph over x-axis we have:

Reflecting f(x) across the x-axis gives us -f(x) = -√x.

Translating -f(x) = -√x 7 units to the right gives us -f(x-7) = -√(x-7).

Hence, the equation of the graph of the function g(x) is -√(x-7).

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The correct answer is E) approximately normal.

When the process of rolling a fair 20-sided die 60 times and computing the value of chi-square using expected counts of 3 for each face is repeated many times, the distribution of the values of chi-square should be approximately normal. This is because the chi-square distribution is a special case of the gamma distribution, and as the degrees of freedom increase, the chi-square distribution approaches a normal distribution. In this case, the degrees of freedom are 19 (20-1), which is a relatively large number, so the distribution should be approximately normal.

To summarize, the repeated process of rolling a fair 20-sided die 60 times and computing the value of chi-square using expected counts of 3 for each face will result in an approximately normal distribution of the values of chi-square.

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Yes, if u1, u2, and u3 are linearly independent, then v1, v2, and v3 will also be linearly independent.  


To show this, assume that v1, v2, and v3 are linearly dependent. This means that there are scalars a,b, and c, such that:

a*v1 + b*v2 + c*v3 = 0

Since v1 = u1 + u2, v2 = u1 + u3, and v3 = u2 + u3, the equation above can be rewritten as:

a*(u1 + u2) + b*(u1 + u3) + c*(u2 + u3) = 0


Simplifying, this gives us:

(a + b + c)*u1 + (a + c)*u2 + (b + c)*u3 = 0


But since u1, u2, and u3 are linearly independent, the coefficients (a + b + c), (a + c), and (b + c) must all be equal to 0. This implies that a = b = c = 0, meaning that the original equation must be equal to 0. This means that v1, v2, and v3 are linearly independent.

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Vertical Line (1, 0, 0, 10)

Each augmented matrix has 4 basic variables. The augmented matrix above is written as
\[ \left[\begin{array}{rrrr|r}1 & 0 & 0 & 10 & -9 \\ 0 & 1 & 0 & 0 & 4 \\ 0 & 0 & 1 & 0 & -6\end{array}\right] \]
where the 4 basic variables are the columns of the matrix before the vertical line (1, 0, 0, 10).

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1. 9 months 2) $163.06, because it is the remaining balance after paying off the principal and interest accrued for that month. 3) $348.16, because it is the balance remaining on the lower interest card after paying off the higher interest card and making the monthly payment for that month. 4) 9 months 5) $168.79, because it is the difference between the total amount paid to each card when paying off the higher interest card first versus paying off the lower interest card first.

Interest is the fee paid for the use of borrowed money, usually expressed as a percentage of the borrowed amount.

Therefore, 1. 9 months 2) $163.06, because it is the remaining balance after paying off the principal and interest accrued for that month. 3) $348.16, because it is the balance remaining on the lower interest card after paying off the higher interest card and making the monthly payment for that month. 4) 9 months 5) $168.79, because it is the difference between the total amount paid to each card when paying off the higher interest card first versus paying off the lower interest card first.

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[tex](f+g)(x)= f(x) .g(x)[/tex][tex](f+g)(0) = f(0)+g(0) = 1+\frac{1}{2} = \frac{3}{2}[/tex][tex]g(0) = \frac{1}{2-0} =\frac{1}{2}[/tex]Answer:

Step-by-step explanation:

We are given:

[tex]f(x) = x^{2} +1\ ;g(x) = \frac{1}{2-x}[/tex]

We need to find:

a) [tex](f+g)(0)[/tex]

b) [tex](f.g)(0)[/tex]

[tex]f(0) = 0^{2} +1 = 1[/tex]

[tex]g(0) = \frac{1}{2-0} =\frac{1}{2}[/tex]

a) we know that

[tex](f+g)(x)= f(x) +g(x)[/tex]

[tex](f+g)(0) = f(0)+g(0)[/tex]

Using the value of f(0) and g(0)

we get

b) we know that

[tex](f+g)(x)= f(x) .g(x)[/tex]

[tex](f+g)(x)= f(x) .g(x) = (1)(\frac{1}{2}) =\frac{1}{2}[/tex]

So we have answer for a) 3/2 and for b) 1/2

Using the expressions to evaluate each function we are left with the following:

To evaluate the expressions, we simply need to substitute the value of x with 0 in the given functions and then perform the indicated operations. For part a, we need to add the functions f and g, and for part b, we need to multiply them:

(f + g)(0) = f(0) + g(0) = (0² + 1) + (1 / (2 - 0)) = 1 + (1 / 2) = 1.5

(f · g)(0) = f(0) * g(0) = (0² + 1) * (1 / (2 - 0)) = 1 * (1 / 2) = 0.5

In conclusion, we have that (f + g)(0) = 1.5 and (f · g)(0) = 0.5.

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The sales price of the item after the 15% discount is $850.

The original price of the item is $1,000 and the discount rate is 15%. To find the amount of the sales price, we need to calculate the amount of the discount and subtract it from the original price.

Step 1: Calculate the amount of the discount by multiplying the original price by the discount rate.
Discount = Original Price x Discount Rate
Discount = $1,000 x 0.15
Discount = $150

Step 2: Subtract the amount of the discount from the original price to find the sales price.
Sales Price = Original Price - Discount
Sales Price = $1,000 - $150
Sales Price = $850

Therefore, the sales price of the item after the 15% discount is $850.

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The percent of each response are 20%, 30%, 15%, 20%, and 15%, respectively.

What is Percentage?

By dividing the value by the entire value and multiplying the result by 100, one may get the percentage. A figure or ratio stated as a fraction of 100 is called a percentage. Often, it is indicated with the percent symbol, "%".

To find the percent of each response, we need to divide the number of responses for each choice by the total number of responses, and then multiply by 100.

Let's assume the total number of responses received for the survey was 500.

The choices and number of responses received for each were:

100 people responded "Too expensive": (100 / 500) x 100% = 20%

150 people responded "Poor service quality": (150 / 500) x 100% = 30%

75 people responded "Too far away": (75 / 500) x 100% = 15%

100 people responded "Long wait times": (100 / 500) x 100% = 20%

75 people responded "Other": (75 / 500) x 100% = 15%

Therefore, the percent of each response are 20%, 30%, 15%, 20%, and 15%, respectively.

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The values of the length and angle are;

AD = 22 units

m < ADC = 106 degrees

The properties of a kite are given as;

From the information given, we have that;

AB = 8x - 2

AD = 6x + 4

Equate the sides

8x - 2 = 6x + 4

collect like terms

2x = 6

x = 3

AD = 22 units

Also,

m < ABC = m < ADC

Substitute the values

12x + 10 = 15x - 14

collect like terms

-3x = -24x

x = 8

m < ADC = 106 degrees

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Answer: AD = 22 units

Step-by-step explanation:

m < ADC = 106 degrees

AB = 8x - 2

AD = 6x + 4

Equate any sides

8x - 2 = 6x + 4

Collect terms

2x = 6

x = 3

AD = 22 units

m < ABC = m < ADC

Substitute the values

12x + 10 = 15x - 14

Collect terms

-3x = -24x

x = 8

m < ADC = 106 degrees

The is no solution of the  equation  (1)/(x-1)-1=(x)/(x-1).

To solve for all values of x in the equation (1)/(x-1)-1=(x)/(x-1), we can follow these steps:

1. Multiply both sides of the equation by (x-1) to eliminate the denominators:
1 - (x-1) = x

2. Simplify the left side of the equation:
- x + 2 = x

3. Add x to both sides of the equation to isolate the variable on one side:
2 = 2x

4. Divide both sides of the equation by 2 to solve for x:
x = 1

Therefore, the solution for x is 1.

When we plug x = 1 back into the original equation, we get a denominator of 0, which is undefined. This means that there are actually no solutions for this equation.

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