need help
please help me

Answer:

Step-by-step explanation:

You want the area of the composite figure consisting of a rectangle and a triangle.

The area of the rectangle is ...

  A = LW

  A = (5 ft)(6 ft) = 30 ft² . . . . rectangle area

The base of the triangle is the difference in length of the horizontal segments:

  b = 9 ft -5 ft = 4 ft

The area is given by the formula ...

  A = 1/2bh

  A = 1/2(4 ft)(6 ft) = 12 ft² . . . . triangle area

The area of the figure is the sum of the areas of its parts:

  total area = rectangle area + triangle area

  total area = 30 ft² +12 ft²

  total area = 42 ft²

__

Additional comment

The area of this trapezoid can also be found using the trapezoid formula:

  A = 1/2(b1 +b2)h

  A = 1/2(9 ft +5 ft)(6 ft) = 42 ft²

The rectangle is shown in the figure as 5 ft wide and 6 ft tall. It does not matter which of these dimensions you call the length and which you call the width. Their product is the same either way.

Answer:

[tex]\displaystyle \int {xe^{5x}} \, dx=\frac{1}{5}xe^{5x}-\frac{1}{25}e^{5x}+C[/tex]

Step-by-step explanation:

Given Problem

[tex]\displaystyle \int {xe^{5x}} \, dx[/tex]

Make substitutions for IBP

Let [tex]u=x,\,du=dx[/tex] and [tex]v=\frac{1}{5}e^{5x},\,dv=e^{5x}dx[/tex]

Perform IBP

[tex]\displaystyle \int {u} \,dv=uv-\int {v} \, du\\\\\int {xe^{5x}} \, dx=\frac{1}{5}xe^{5x} -\int {\frac{1}{5}e^{5x}} \, dx\\\\\displaystyle \int {xe^{5x}} \, dx=\frac{1}{5}xe^{5x}-\frac{1}{25}e^{5x}+C[/tex]

Answer:

684π

Step-by-step explanation:

It is two parts: half of a sphere and one cylinder.

Sphere volume formula: V=4/3πR³, r=12/2=6, r³=216

                                      v=4/3π216

                                      v=288π

Half of sphere:  288π/2=144π

Cylinder volume: V=πr²h, r=12/2=6, r²=36, h=15,

                           V=π*36*15=540π

So, total is 144π+540π=684π

Answer:

(1/x)+31

Step-by-step explanation:

To simplify the expression

5/(1/6) + 1/X + 1,

we need to first simplify the fraction 5/(1/6):

5/(1/6) = 5 * 6/1 = 30

Now we can substitute this value back into the expression:

30 + 1/X + 1

To combine the last two terms, we need to find a common denominator, which is X:

30X/X + 1/X + X/X

Simplifying the numerator:

30X + 1 + X

Combining like terms:31X + 1

so the simplified rational expression is (1/x)+31

Step-by-step explanation:

a. Given a positive test result, the probability that a random patient has the disease is called the positive predictive value (PPV). The PPV can be calculated using the following formula:

PPV = Sensitivity * Prevalence / (Sensitivity * Prevalence + (1 - Specificity) * (1 - Prevalence))

Plugging in the values given in the question, we get:

PPV = 0.92 * 0.01 / (0.92 * 0.01 + (1 - 0.93) * (1 - 0.01)) = 0.087

So, the probability that a random patient has the disease given a positive test result is 0.087 or 8.7%.

b. A tree diagram for a typical sample of patients with a positive test result would look something like this:

+-----------+-----------------+

| Test Result| Positive (TP + FP) |

+-----------+-----------------+

| | TP (Disease) |

| | 0.92 * 0.01 |

| | FP (No Disease)|

| | 0.08 * 0.99 |

+-----------+-----------------+

c. If the prevalence is lower, the proportion of positive test results due to false positives (FP) increases compared to true positives (TP). This is because the positive predictive value (PPV) decreases as the prevalence decreases, meaning that a larger proportion of positive test results are due to false positives. This is why the proportion in error is larger if the prevalence is lower.

Answer:

The $30,000 in revenue should be entered as a credit in the journal entry.

Step-by-step explanation:

In accounting, revenues are recorded as credits, which means that they increase the credit side of the accounting equation (revenues increase equity, which is a credit account). Debits, on the other hand, are used to record expenses and decreases in assets.Therefore, the journal entry to record $30,000 in revenue for the business on October 1 would be:Date

Account Account Number Debit Credit

1 - Oct Revenue 4050 30,000Since revenue is being credited, there is no debit amount entered in this entry. The credit amount of $30,000 is entered in the credit column, as shown above.

Answer:

Stem | Leaf

-----|-----

1    | 2 7 7 2 4

2    | 9 8 7 6 3 0 9 7

3    | 7 6 4 3 1 7

4    | 3 6

-----|-----

Step-by-step explanation:

To create a stem-and-leaf plot, we first divide each data point into two parts: the stem, which is the first digit or digits, and the leaf, which is the final digit or digits.

For this data set, the stem for each data point would be the tens digit, and the leaf would be the units digit.

Here's how the plot would look like:

Stem | Leaf

-----|-----

1    | 2 7 7 2 4

2    | 9 8 7 6 3 0 9 7

3    | 7 6 4 3 1 7

4    | 3 6

-----|-----

Note that the stems are listed in increasing order, and the leaves for each stem are listed in order within that stem. This helps to give an overall sense of the distribution of the data, such as the range and the concentration of data points in certain regions.

Answer:

a. 1996

Step-by-step explanation:

Let Paul's age in 2000 be P

Let Bilko's age in 2000 be B

Statement: Paul was twice as old as his brother Biko in 2000 means
P = 2B          (1)

In 2008 Paul was only four years older than his brother.

Since 2008 is 8 years from 2000, both Paul and Bilko have aged 8 years

Paul's age in 2008 = P + 8

Bilko's age in 2008 = B + 8

Statement: In 2008 Paul was only four years older than his brother means

P + 8 = B + 8 - 4

P = B + 4           (2)

Given these two equations (1) and (2)

Substitute P = 2B from (1) in (2):
2B = B + 4

==> 2B - B = 4

==> B = 4

Therefore in 2000, Paul was 8 years old and Bilko was 4 years old

Bilko's year of birth = 2000 - 4 = 1996

Answer:

Option A: 4/5

Step-by-step explanation:

If y varies directly as x written as y ∝ x, this can be written as an equation:
y = kx  where k is a constant

Since y = 6 when x = 15:
6 =k · 15

6 = 15k

15k  = 6

k = 6/15  = 2/5

The equation beocmes
y = (2/5) x

Therefore when x = 2,

y = (2/5) x 2 = 4/5

Option A: 4/5

392

8630 divided by 22. = 392.272727... cant be decimal so round down

Answer:

27.87

Step-by-step explanation:

In a right triangle, the length of the hypotenuse can be found using the Pythagorean theorem, which states that the sum of the squares of the two shorter sides is equal to the square of the length of the hypotenuse.

Using the given sides, we can write the equation:

AB^2 + BC^2 = AC^2

Substituting the given values, we have:

17^2 + 22^2 = AC^2

Simplifying the left side, we get:

289 + 484 = AC^2

773 = AC^2

Taking the square root of both sides, we find:

AC = √773 = 27.87

Rounding to two decimal places, the length of side AC is approximately 27.87.

The column vectors of this matrix are linearly independent, meaning they are not dependent upon one another, and the determinant is not equal to 0.

The given matrix is:

| 1 0 5 |

| -2 1 -6 |

| 0 2 8 |

We must compute the matrix's determinant in order to determine if the matrix's column vectors are linearly independent or linearly dependent.

A scalar value that can be used to assess linear dependency or independence is the determinant of a matrix.

The determinant of the matrix is:

det(A) = 1(-68) - 0(18) + 5(-2*2) = -6 + 0 - 20 = -26

Since The column vectors of this matrix are linearly independent, meaning they are not dependent upon one another, and the determinant is not equal to 0.

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Amount of gallons of water after 6 hours is  482 gallons.

Volume of a three dimensional shape is the space occupied by the shape.

Given that,

Initial volume of the swimming pool = 500 gallons

The change in the amount of water in the pool is -3 gallons per hour.

Each hour, the volume of the pool is decreasing by -3 gallons.

Change in the amount of water in 1 hour = -3 gallons

Change in the amount of water in 6 hours = -3 × 6 = -18 gallons

After 6 hours,

Volume of the pool = 500 - 18 = 482 gallons

Hence there will be a volume of 482 gallons of water after 6 hours.

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Answer:

Step-by-step explanation:

If you work 55 hours in one week and earn $15 per hour, your gross pay before taking into account any overtime can be calculated as follows:

Gross pay = 55 hours x $15/hour = $825

If you work overtime, which is time and a half, the additional pay can be calculated as follows:

Overtime pay = ($15/hour x 1.5) x (55 hours - 40 hours) = ($22.50/hour x 15 hours) = $337.50

So, the total gross pay including the overtime pay is:

Gross pay = $825 + $337.50 = $1,162.50

Therefore, the total gross pay for working 55 hours in one week at $15 per hour, with overtime pay calculated as time and a half, is $1,162.50.

Based on the information, it can be inferred that the area of a surface with sides 23 yards and base 23 yards is 529 square yards.

To calculate the surface area of this figure we must perform the following procedure:

We know the side and the base of this figure measure 23 yards, so we must apply the following formula.

So we can infer that the area of this surface would be 534 square yards.

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Answer:

(3x-2)(10x+3)

Step-by-step explanation:

Showing this information in a ledger is given below":

Ordinary Share Capital:

28 February 2021: 1,000,000 authorized shares * 500 cents per share (for the shares issued on 31 August 2020) = R500,000

28 February 2020: 600,000 issued shares * R35 (2,100,000 / 60) = R21,000

Retained Income:

28 February 2021: R500,000 (Ordinary Share Capital) - R21,000 (Ordinary Share Capital) + R120,000 (repurchased shares at 620 cents per share) = R599,000

28 February 2020: R737,100 (Retained Income)

Note: The R35 per share in 28 February 2020 was calculated by dividing the total ordinary share capital of R2,100,000 by the number of shares in issue (600,000).

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The probability of buying 3 tires is 0.05 and the cumulative probability distribution table is created.

What is meant by probability?

The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. An event's probability is a number between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty.

Given,

     Percentage of people who buys 4 tires = 50%

      Percentage of people who buys 2 tires = 32%

      Percentage of people who buys less than 2 tires = 13%

    Percentage of people who buys none = 6%

a) Prob(X=0) = 0.06

    Prob(X=2)  = 0.32

   Prob(X=4)  = 0.50

 Prob(X < 2) = Prob(X=0) + prob(X=1) = 0.06+ prob(X=1)

   prob(X=1) =   Prob(X < 2) - 0.06  = 0.13 - 0.06 = 0.07

Therefore prob(X = 3) = 1 - ( 0.5+0.32+0.07+0.06) = 1 - 0.95 = 0.05 = 5%

b) Cumulative probability distribution is as given in the figure.

Therefore the probability of buying 3 tires is 0.05 and the cumulative probability distribution table is created.

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a. there are three vectors in {a₁, a₂, a₃}.

b. There are infinitely many vectors in W = span {a₁, a₂, a₃} by definition.

c. we have that a₁ is in the W.

A matrix is a set of integers arranged in rows and columns. The rows and columns of integers are arranged in a rectangular matrix. The matrix A, for instance, contains two rows and three columns. The elements of the matrix, also known as the entries, are the integers. In addition to many areas of mathematics, matrices are widely used in the fields of engineering, physics, economics, and statistics.

a. The vector b is not in {a₁ ,a₂, a₃} since b is not equal to any of the column vectors of A. Clearly, there are three vectors in {a₁, a₂, a₃}.

b. Vector b is in W if the augmented matrix [a₁, a₂, a₃ b] is consistent.

The augmented matrix is:

[tex]\left[\begin{array}{cccc}1&0&-4&4\\0&3&-2&1\\-2&6&3&-4\end{array}\right] \sim \left[\begin{array}{cccc}1&0&-4&4\\0&3&-2&1\\0&6&-5&4\end{array}\right] \sim \left[\begin{array}{cccc}1&0&-4&4\\0&3&-2&1\\0&6&-1&2\end{array}\right][/tex]

Thus, since the system is consistent we have that b must be in W.

There are infinitely many vectors in W = span {a₁, a₂, a₃} by definition.

c. since   [tex]\left[\begin{array}{c}1\\0\\-2\end{array}\right] = 1. \left[\begin{array}{c}1\\0\\-2\end{array}\right] + 0. \left[\begin{array}{c}1\\0\\-2\end{array}\right] + 0. \left[\begin{array}{c}1\\0\\-2\end{array}\right][/tex] we have that a₁ is in the W.

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a. there are three vectors in {a₁, a₂, a₃}.

b. There are infinitely many vectors in W = span {a₁, a₂, a₃} by definition.

c. we have that a₁ is in the W.

A matrix is a set of integers arranged in rows and columns. The rows and columns of integers are arranged in a rectangular matrix. The matrix A, for instance, contains two rows and three columns. The elements of the matrix, also known as the entries, are the integers. In addition to many areas of mathematics, matrices are widely used in the fields of engineering, physics, economics, and statistics.

a. The vector b is not in {a₁ ,a₂, a₃} since b is not equal to any of the column vectors of A. Clearly, there are three vectors in {a₁, a₂, a₃}.

b. Vector b is in W if the augmented matrix [a₁, a₂, a₃ b] is consistent.

No, b is not in {a1, a2, a3}.

There are 3 vectors in {a1, a2, a3}.

Yes, b is in W.

There are infinitely many vectors in W.

Yes, a1 is in W because it can be expressed as a linear combination of the vectors in W. This is shown by the equation a1 = 1(a1) + 0(a2) + 0(a3).  The coefficients of the vectors in the linear combination are all integers and this equation shows that a1 is in the span of the vectors in W.

Thus, since the system is consistent we have that b must be in W.

There are infinitely many vectors in W = span {a₁, a₂, a₃} by definition.

c. since we have that a₁ is in the W.

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Answer:

The surface area of a rectangular prism can be calculated by adding the area of each of its six faces. The formula for the surface area of a rectangular prism with length l, width w, and height h is:

Surface Area = 2lw + 2lh + 2wh

So for a rectangular prism with length 29 inches, width 36 inches, and height 5 inches, the surface area can be calculated as follows:

Surface Area = 2 * 29 * 36 + 2 * 29 * 5 + 2 * 36 * 5

= 2,612 + 290 + 360

= 3,262 square inches

Therefore, the surface area of the rectangular prism is 3,262 square inches.

Answer:

Salary with $3300 raise per year:

t (years)     Salary

1            $69300

5            $82600

10            $95900

15            $1092000

20            $1225000

Salary with 4% raise per year:

t (years)      Salary

1             $68640

5             $83833

10             $102219

15             $124869

20             $152947

Note: The calculations for the 4% raise are done as follows:

Year 1: 66000 * 1.04 = $68640

Year 5: 66000 * 1.04^5 = $83833

Year 10: 66000 * 1.04^10 = $102219

Year 15: 66000 * 1.04^15 = $124869

Year 20: 66000 * 1.04^20 = $152947

Step-by-step explanation:

The change in temperature between 11.00am and 11.00pm would be = 43°F. That is option D.

Temperature is defined as the scalar quantity that shows or measure the degree of hotness or coldness of a medium.

The temperature of a medium at 11.00am = 37°F

The temperature of a medium at 11.00 pm = -6°F

The difference between the both given temperature = 37-(-6) = 37+6 = 43°F.

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The entire length of the trip is 9/12 miles.

Combining objects and counting them as one big group is done through addition. In arithmetic, addition is the process of adding two or more integers together. Addends are the numbers that are added, and the sum refers to the outcome of the operation.

Given:

After biking 5/12 miles,

Jada has traveled 2/3 of the length of her trip.

Let x be the entire length of the trip.

The equation is,

x = 1/3 + 2/3

x = 1/3 + 5/12

x = 9/12

Therefore, the distance is 9/12 miles.

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For given function f(x) = √x + 9, the inverse function and domain are respectively, f⁻¹(x) = (y - 9)², x ≥ 0 & x ∈ (∞, ∞)

Function is a relation between a set of inputs and a set of outputs which are permissible. In a function, for particular values of x we will get only a single image in y. It is denoted by f(x).

Given that,

A function,

⇒ f(x) = √x + 9

f⁻¹(x) = ?

the given function is defined for all the values of x,

So domain of the function is real number,

x ∈ (∞, ∞)

Now for f⁻¹(x),

Suppose, f(x) = y

y = √x + 9

y - 9 = √x

squaring both the sides,

(y - 9)² = (√x)²

x  = (y - 9)²

And value of x should be greater than zero

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Equations that represent circles that have a diameter of 12 units and a center that lies on the y-axis are

x² + (y - 3)² = 36 and x² + (y + 8)² = 36

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the center, it is the curve traced out by a point that moves in a plane so that its distance from a given point is constant.

Given equations

⇒ x² + (y - 3)² = 36

comparing with general equation of circle

( x - h )² + ( y - k )² = r²

Center (h , k) = (0 , 3)

Center is on y - axis

Radius r = √36 = 6units

Diameter = 2r = 2×6 = 12units

⇒ x² + (y - 5)² = 6

comparing with general equation of circle

( x - h )² + ( y - k )² = r²

Center (h , k) = (0 , 5)

Center is on y-axis

Radius r = √6 units

Diameter = 2r = 2√6 units

⇒ (x – 4)² + y² = 36

comparing with general equation of circle

( x - h )² + ( y - k )² = r²

Center (h , k) = (4 , 0)

Center is on x-axis

Radius r = √36 = 6units

Diameter = 2r = 2×6 = 12units

⇒ (x + 6)² + y² = 144

comparing with general equation of circle

( x - h )² + ( y - k )² = r²

Center (h , k) = (-6 , 0)

center is on x-axis

Radius r = √144 = 16units

Diameter = 2r = 2×16 = 32units

⇒ x² + (y + 8)² = 36

comparing with general equation of circle

( x - h )² + ( y - k )² = r²

Center (h , k) = (0 , -8)

Center is on y-axis.

Radius r = √36 = 6units

Diameter = 2r = 2×6 = 12units

Hence, equation x² + (y - 3)² = 36 and x² + (y + 8)² = 36 represents the circle with diameter 12 units and a center that lies on y-axis.

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Answer: (-1.25, 0.41)

Step-by-step explanation:

Answer:

It is graphed in the picture.

Step-by-step explanation:

Answer:

See the attached graph

Step-by-step explanation:

Take each inequality and isolate x for each

x+1 < 9
==> x + 1 - 1 < 9 -1  add 1 both sides

==> x < 8

4x ≤ 8

==> 4x/4 ≤ 8/4    divide by 4 both sides

==> x  ≤ 2

So we have two inequalities to satisfy

To graph,

To graph the first inequality, draw a vertical line at x = 9 parallel to the y-axis. This line should be dotted to show it is a < inequality. Everything to the left of this line satisfies x < 8

To graph the second inequality, x ≤ 2, draw a vertical line at x = 2 parallel to the y-axis. This line should be solid to show it is a ≤ inequality. Everything to the left of this line satisfies x ≤ 2

The common points for both lines are shown in dark purple in the graph where the two shaded areas overlap

If you just wanted it on the number line that would be the second image

Answer:

[tex] \frac{14}{16} \: and \: \frac{13}{16} [/tex]

Step-by-step explanation:

So we have these two fractions

[tex] \frac{7}{8} \: and \: \frac{13}{16} [/tex]

Does 8 go into 16? Yes. It goes in twice because 8 times 2 is 16. That means 16 is our common denominator.

Because of that, since we multiplied 8 by 2, we will do the same to the 7. 7 times 2 is 14.

Because of that we have 14/16 and 13/16 as our answers.