Someone explain 15 points and I will give u a Brainly thing

The volume of the Oblique pyramid is 19 \(ft^{2}\)

We know, the volume of a pyramid is \(\frac{1}{2}\) × B × h

where B is the area of the base and h is the height of the pyramid.

Given:  The pentagonal base has an edge length of 2.16 ft and an area of 8 \(ft^{2}\) and angle ACB measures 30°.

Consider triangle ACB

tan30° = \(\frac{AB}{CB}\)

\(\frac{1}{\sqrt{3} }\) = \(\frac{AB}{7\sqrt{3} }\)

AB = 0.58 × \(7\sqrt{3}\)

AB = 0.58 × 12.12

AB = 7.03

Now, the volume of the oblique pyramid will be

V = \(\frac{1}{2}\) × 8 × 7.03

V = 18.75

V ≈ 19 \(ft^{2}\)

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Answer:19

Step-by-step explanation:

The mass of the solid is 7π/2 units.

The task is to calculate the mass of the solid.

Step-by-step solution: The solid occupies the region between the unit sphere at the origin and a sphere of radius 2 with the center at the origin. The spherical coordinates in 3D space are (r,θ,φ), where:r = radius, θ = polar angle, φ = azimuthal angle.

The equations of the given sphere are r=1 for the unit sphere and r=2 for the second sphere.

Using spherical coordinates, the solid can be defined as 1≤r≤2, 0≤θ≤2π, 0≤φ≤π.

The density is equal to the distance from the origin, i.e. ρ = r.

The mass of the solid is given by the triple integral ρ dV taken over the solid, where dV is the volume element in spherical coordinates.dV = r²sin φ dφdθdr

The limits for the triple integral are: 0 ≤ θ ≤ 2π, 0 ≤ φ ≤ π, and 1 ≤ r ≤ 2.M = ∭ρ dV = ∭r(r²sin φ) dφdθdr= ∫[0,2π]∫[0,π]∫[1,2] r³sin φ drdφdθ= ∫[0,2π]∫[0,π] -cos φ [r⁴/4]₁ ₂ drdφdθ= ∫[0,2π]∫[0,π] 7/4 cos φ dφdθ= ∫[0,2π] 7sin φ/4 ]₀  π dθ= 14π/4= 7π/2 units.

The mass of the solid is 7π/2 units.

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In the case above, Jaime claim is true.

1. Note that radian measure:

=   \(\frac{60° }{360°}\) x 2π  x 3

= 1/6 x 6π  

= π  

2. Note that radian measure:

=  \(\frac{60° }{360°}\) x 2π  x 6

= 1/6  x 2π  x 6

=2π  

So we can write it as:

π/3  x 180°/π    = 60°

Therefore, via the solution above, Jaime claim is true.

3. Note that: Radian measures: the percentage of arc measures x  2π  x radius and so one can say that The explanation to agree with Jaime’s statement or not is that the longer the length of the radius, the longer the length of the arc.

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Answer:

y=-4/3x-4

Step-by-step explanation:

y=mx+y intercept    <--- formula i used

The value of x is 10.

We have,

Base= 24

Hypotenuse= x+ 16

Base= x

Using Pythagoras theorem

H² = P² + B²

(x+16)² = x² + 24²

x² + 256 + 32x = x² + 576

x² - x² + 256 - 576 + 32x= 0

-320 + 32x= 0

32x= 320

x= 320/32

x= 10

Thus, the value of x is 10.

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Answer:

A: A unique triangle

B: A unique triangle

C: More than a triangle

a) Yes, It does. The scatterplot support the newspaper report about number of semesters and starting salary.

b) The value is relatively low, indicating that there are other factors that also contribute to starting salary.

c) The correlation coefficient is a value between -1 and 1 that measures the strength and direction of the linear association between two variables.

a) The scatterplot appears to show a positive association between the number of semesters needed to complete an academic program and the starting salary in the first year of a job. As the number of semesters increases, the starting salary generally increases as well. Therefore, the scatterplot supports the newspaper report.

b) The coefficient of determination, or R-squared value, represents the proportion of the variation in the dependent variable (starting salary) that is explained by the independent variable (number of semesters). A value of 0.335 means that 33.5% of the variation in starting salary is explained by the number of semesters. This value is relatively low, indicating that there are other factors that also contribute to starting salary.

c) The correlation coefficient is a value between -1 and 1 that measures the strength and direction of the linear association between two variables. A value of 1 indicates a perfect positive correlation, a value of -1 indicates a perfect negative correlation, and a value of 0 indicates no correlation. The correlation coefficient for this data is not provided in the problem, so it is not possible to determine it. Without the correlation coefficient, it is not possible to interpret the strength and direction of the association between number of semesters and starting salary.

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To evaluate \(8^{\frac{2}{3} }\) first find the square of 8 and then take the cube root.

The way of representing huge numbers in terms of powers is known as an exponent. Exponent, then, is the number of times a number has been multiplied by itself.

Depending on the powers they possess, many rules of exponents are given.

Law of Multiplication: Exponents should be added while keeping the base constant when multiplying like bases.

Exponents should be multiplied while bases are kept constant when bases are raised by a power of two or more.

Division Rule: When dividing like bases, maintain the base constant and deduct the exponent of the denominator from the exponent of the numerator.

The given value can be written as:

\(8^{\frac{2}{3} } = \sqrt[3]{8^{2} }\)

Hence, to evaluate \(8^{\frac{2}{3} }\) first find the square of 8 and then take the cube root.

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The example of 2×3 matrix A and a 3×2 matrix B such that, letting T(x)=Ax and U(x)=Bx is reflection Ab.

Matrices, the plural form of matrix, are the groupings of numbers, variables, symbols, or phrases in a rectangular table with varying rows and columns. These are rectangular arrays with specified operations such as addition, multiplication, and transposition. The elements of the matrix are the numbers or entries in it. The horizontal entries of matrices are referred to as rows, whereas the vertical elements are referred to as columns.

Let,

\(B = \left[\begin{array}{cc}0&1\\1&0&0&0\end{array}\right] , A = \left[\begin{array}{ccc}1&0&0\\0&1&0\\\end{array}\right]\)

Then,

\(AB =\left[\begin{array}{ccc}1&0&0\\0&1&0\\\end{array}\right] \left[\begin{array}{cc}0&1&1&0&0&0\\\end{array}\right] \\\\AB = \left[\begin{array}{cc}0&1&1&0\\\end{array}\right]\)

Therefore, Ab is reflection about y = x .

As U = Bx and T∘U    

A matrix is a rectangular array of integers, variables, symbols, or expressions that are defined for subtraction, addition, and multiplication operations. The number of rows and columns in a matrix determines its size (also known as the order of the matrix).          

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Answer:

(6,8)

I know because I did it coool

The recursive method "mystery" returns the sum of the values in an array that are divisible by the integer passed as an argument. When called with 2 as the argument, the method returns 70.

The "mystery" method is a recursive function that takes two parameters: an array of integers and an integer n. The function returns the sum of all elements in the array that are divisible by n. When the "mystery" method is called with an array containing 5, 10, 15, 20, 25, 30, 35, and 40, and n=2, the method first checks if the array is empty. If the array is empty, the function returns 0. If the array is not empty, the method checks if the first element in the array is divisible by n=2. If it is divisible, the function adds the element to the sum of the remaining elements in the array that are divisible by n. If it is not divisible, the function adds the sum of the remaining elements in the array that are divisible by n to the result.

In this case, the first element of the array is 5, which is not divisible by 2, so the function calculates the sum of the remaining elements in the array that are divisible by 2. This sum is equal to 10 + 20 + 30 = 60. Therefore, the function returns 60 as the result.

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The independent variable is time (hours), and the dependent variable is cost ($). The given relation is linear because it has a constant rate of change. The initial value for this relation is $240 and the rate of change is $30 per hour.

The table for the given relation is

Time (hours)                  Cost ($)

    0                                    240

    2                                    300

    4                                    360

    6                                    420

    8                                    480

    10                                   540

    12                                   600

    14                                   660

In this relation, the independent variable is time (hours), and the dependent variable is cost ($). The time is the input to the relation, and the cost is the output that is dependent on the input.

We can see that this relation is linear because it has a constant rate of change. The cost increases by $30 for each hour of work, which means that the slope of the line is constant.

The initial value for this relation is $240, which represents the cost of the full landscape plan. The rate of change is $30 per hour, which represents the additional cost for each hour of work. Therefore, the equation for this linear relation is

Cost = 30 x Time + 240

where "Cost" is the cost in dollars, "Time" is the time in hours, 30 is the rate of change, and 240 is the initial value.

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On its entire domain, f(x) is declining.

We just need to think about function 1's behaviour because function 2 is a constant function and is neither increasing nor decreasing.

Finding the location of its negative derivative will help us understand where f(x) = -5x + 21 is declining. For all values of x, the derivative of f(x) equals -5, which is negative. As a result, f(x) is getting smaller across the board.

Hence, the range where both functions are decreasing can be represented as the complete domain of function 1: (-, ). On a number line, the following can be used to represent this interval:

 -30  -20   -10    0     10      20    30

—-|——|——| ——|——-| ——-|—— |—-

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Answer:

see photos

Step-by-step explanation:

Plato/Edmentum

By using unitary method, we found that the cost of 5m cloth is Rs. 1050.

According to the unitary method, the cost of 1 meter of cloth is equal to the total cost of 7 meters of cloth divided by 7. That is,

Cost of 1m cloth = Total cost of 7m cloth/7

We know that the total cost of 7m cloth is Rs. 1470. Therefore,

Cost of 1m cloth = 1470/7

Cost of 1m cloth = Rs. 210

This means that the cost of 1 meter of cloth is Rs. 210. Now, we need to find the cost of 5m cloth. To do that, we can use the unitary method again.

Cost of 5m cloth = Cost of 1m cloth x 5

Cost of 5m cloth = Rs. 210 x 5

Cost of 5m cloth = Rs. 1050

Therefore, the cost of 5m cloth is Rs. 1050.

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Answer: 3

Step-by-step explanation:

The required polar form of the equation is \(Z = 5/2cos30 - 5/2sin30i.\)

For the complex number z = (5sqrt(3))/4 - 5/4 * i the polar form is to be determined.

The number that constitutes real and imaginary numbers are called complex numbers. The standard form of complex number = a + bi

\(z = 5\sqrt{3}/4 - 5/4i\)
the polar form complex numbner  can be given as
\(z = rcos\theta +rsin\theta i\)   - - - - - -(1)
where r = \(\sqrt{a^2+b^2}\)
and \(\theta=tan^-\frac{b}{a}\)

Since a = 5√3/4 and b = -5/4
\(r = \sqrt{(5\sqrt{3}/4)^2+(5/4)^2}\)
r = 10/4
r = 5/2
Now,
\(\theta=tan^-\frac{b}{a}\)
\(\theta=tan^-\frac{-5/4}{5\sqrt{3}/4 }\\\theta=tan^-\frac{1}{\sqrt{3} }\\\theta=tan^-(-tan30)\\\theta=-30\)

Now the polar form is given by substituting the values of r and \(\theta\) in equation 1
Here,
\(z = 5/2cos30 +5/2sin(-30)i\\z = 5/2cos30-5/2sin30 i\)

Thus, the required polar form of the equation is \(Z = 5/2cos30 - 5/2sin30i.\)

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Answer:

x = 14

Step-by-step explanation:

Triagle GIA and Triangle GNT are congruent.

Answer:

x = 3

Step-by-step explanation:

x + 6 = 9

Subtract 6 from both sides :

x = 9 - 6

x = 3

Hope this helped and have a good day

Answer:

x = 3

Step-by-step explanation:

x + 6 = 9  Subtract  from both sides of the equation

x + 6 - 6 += 9 - 6

x = 3

Check:

x + 6 = 9

3 + 6 = 9

9 = 9 Checks

Answer: a. 1ml : 2ml b. 1h : 3h c. 12m : 1m

Step-by-step explanation:

a. 2 litres = 200ml

200ml : 600ml = 1ml : 3ml

b. 1 day = 24 hours

8h : 24h = 1h : 3h

c. 3 km = 3000m

3000m : 250m = 12m : 1m

Answer:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 1010. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

7.1×1047.1×104

The required regular notation of 71 ×10³ Scientific Notation​ is71,000.

Given that,
Scientific notation is given of 71 ×10³ regular notation of the number is to be determined.

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication and division,

here,
Scientific notation = 71 ×10³
Regular notation = 71 ×10³
71 ×10³ = 71 * 10 * 10 * 10
71 ×10³ = 71000

Thus, the required regular notation of 71 ×10³ Scientific Notation​ is71,000.

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The velocity of the car traveling from one city to another that is 163 km away and takes 2 and a half hours to reach can be calculated as 65.2 km/hour. This is determined by dividing the distance traveled by the time taken, or 163 km / 2.5 hours.

Velocity is a measure of an object's displacement over time. It specifies both the object's speed and direction of movement, and is expressed in units of distance per unit of time, such as meters per second or kilometers per hour.

Distance is the measure of how far apart two points or objects are. It is typically measured in units such as kilometers, miles, meters, or feet.

According to the given information:

To find the velocity of the car, we need to use the formula:

Velocity = Distance / Time

In this case, the distance traveled by the car is 163km and the time taken to travel that distance is 2.5 hours.

Substituting the values into the formula, we get:

Velocity = 163 km / 2.5 hours

Simplifying, we get:

Velocity = 65.2 km/h

Therefore, the velocity of the car is 65.2 km/h.

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Answer:

Step-by-step explanation:

Formula

P = 5 + 1.50n

P is the total Cost

n is the number of Km travelled.

Solution

Substitute n = 25 into the formula

P = 5 + 1.5 * 25

P = 5 + 37.5

P = 42.50

Answer

42.50 dollars for 25 km.

Answer:

1). Does Not

2). Ratio

Step-by-step explanation:

According to the Question,

Given that, Luis has saved $15. He doubles the amount he saves each week.

Answer:

SOLUTION: Explain why the square root of 25 belongs to 4 subsets of the real numbers , but the square root of 5 only belongs to 1 . tell which subsets each belong to and why .

Step-by-step explanation:

The square root of 25 is 5, which  

1. A rational number, since 5 is the ratio of the two integers 5 and 1.

2. An integer since 5 is an element of {...,-3,-2,-1,0,1,2,3,.}  

3. A whole number, since 5 is an element of {0,1,2,3.}

4. A counting number, since 5 is an element of {1,2,3,}

The square root of 5 is only  

1. An irrational number, since it is not the ratio of any two integers.

[It can only be approximated by

this nonrepeating infinite decimal, it goes on forever:

2.2360679774997896964091736687312762354406183596115257...]

Answer:

CPCTC

Step-by-step explanation:

You already proved that triangle BAD is congruent to CAD, this means that all of the corresponding angles and sides with be congruent (CPCTC). That means BD is congruent to CD. Hope this helps!

Calculate the circumference and area of a circle.

To find the circumference, you double the radius and multiply by pi. To find the area, you square the radius and multiply by pi.

Answer:

93° (to the nearest degree)

Step-by-step explanation:

sum of the interior angles of a triangle = 180°

Find angle C first, then subtract angle C and angle B from 180° to find angle A.

Use the sine rule \(\frac{sinA}{a}=\frac{sinB}{b}=\frac{sinC}{c}\) to find angle C:

Therefore,

              \(\frac{sinB}{b}=\frac{sinC}{c}\)

              \(\frac{sin38}{9}=\frac{sinC}{11}\)

         angle C = 48.80523914...°

Angle A = 180 - 38 - 48.80523914...°

              = 93.19476086..°

              = 93° (to the nearest degree)

Answer:

26.25 or 26 1/4

Step-by-step explanation:

Formula for rectangular prism:

\(V=lwh\)

Substitute in our known values:

V=3.5(5)(1.5)

solve

V=26.25

The volume is 26.25 (decimal form) or 26 1/4.

Hope this helps! :)

Answer: 26.25 in³

Step-by-step explanation:

Given volume formula for a rectangular prism:

     V = LWH

First, I am going to turn the \(\frac{1}{2}\)s into 0.5 to make it easier to multiply using a calculator. 3 and one-half becomes 3.5 and 1 and a half becomes 1.5.

Substitute known values and solve by multiplying.

     V = LWH

     V = (3.5 in)(5 in)(1.5 in)

     V = 26.25 in³

The solution to the equation x - 12√x + 36 = 0 is the value of x is 6². Thus, the option (b) is correct.

To solve the equation x - 12√x + 36 = 0, we can use substitution to simplify the equation.

Let's substitute a variable to represent √x:

Let √x = y

Now, we can rewrite the equation as:

y² - 12y + 36 = 0

This is a quadratic equation that can be factored as:

(y - 6)(y - 6) = 0

(y - 6)² = 0

Now, we can solve for y:

y - 6 = 0

y = 6

Since y represents √x, we can substitute back:

√x = 6

To find the value of x, we square both sides:

(√x)² = 6²

x =  6²

Therefore, the value of x is 6².

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The complete question is as follows:

If x - 12 √(x + 36) = 0, what is the value of x?

a. 6

b. 6²

c. 6³

d. 6⁴

Answer:

A

Step-by-step explanation:

Answer:

I’m not sure if I’m right but here I go.

Step-by-step explanation:

Each line goes from zero and down, look at the ponies where they are and find the coordinates.