please help me with math i’ll give you brainlist

a) the angular speed of a point on its equator in radians per day is 6 rad/day.

b) the linear speed of a point on the equator in miles per day is 2 ×10² m.

What is angular speed?

Angular speed is defined as the rate of change of angular displacement, and it is expressed as follows: ω = θ t. where θ is the angular displacement, t is the time and ω is the angular speed.

Here, we have

Given: Suppose that Mars rotates on its axis once every hour. The equator lies on a circle with a diameter of miles.

a) The angular velocity is

 W = θ / t

 t = 1 day (24 h / 1 day) (3600s / 1 h) = 86400 s

w = 2π / 86400

w = 7.27 10⁻⁵ rad / s

Reduce to rad/day

 w = 7.27 rad / s (3600s / 1 h) (24 h / 1 day)

w = 6.28 rad/day

w= 6 rad/day

Hence, the angular speed of a point on its equator in radians per day is 6 rad/day.

b) the linear velocity is

v = w r

Mercury radius is

r = 2.43 106 m

v =  7.27 10⁻⁵ 2.43 10⁶

v = 1.76661 10² m / s

v = 2 ×10² m

Hence, the linear speed of a point on the equator in miles per day is 2 ×10² m.

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Cory will owe $21,120 in taxes on the sale of his qualified small business stock.

Tax liability can be defined as the total amount of taxes an individual, corporation, company, etc owes a tax authority or service at a given period of time.

To determine the tax liability on the sale of qualified small business stock, we need to apply the rules for the Section 1202 exclusion.

First, we need to determine if the stock meets the requirements for the Section 1202 exclusion. The stock must have been acquired directly from a domestic C corporation that meets the criteria for a qualified small business (QSB). The stock must also have been held for more than five years.

Assuming the stock meets these requirements, we can apply the following formula to determine the taxable gain:

Taxable gain = Sale price - Basis

In this case, the taxable gain is:

Taxable gain = $98,000 - $32,000 = $66,000

Next, we need to determine the amount of the gain that qualifies for the Section 1202 exclusion. The exclusion is equal to the greater of:

In this case, the exclusion is based on the 10 times basis rule since the gain is less than $10 million and there are no prior QSB stock sales. Therefore, the exclusion is:

Exclusion = 10 x $32,000 = $320,000

Since the gain of $66,000 is less than the exclusion of $320,000, the entire gain qualifies for the Section 1202 exclusion.

Finally, we need to determine the tax liability on the remaining taxable income. The marginal tax rate of 32 percent will apply to the taxable gain of $66,000, resulting in a tax liability of:

Tax liability = Taxable gain x Marginal tax rate

Tax liability = $66,000 x 0.32 = $21,120

Therefore, Cory will owe $21,120 in taxes on the sale of his qualified small business stock.

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Answer:

50

Step-by-step explanation:

P= 2l + 2w Formula for a perimeter

P= 184 given

l= 4x+2 given

w= 5x given

184= 2(4x+2) + 2(5x) substitution

184= 8x+4+ 10x distributive property

184= 18x+4 combine like terms

184 -4 =18x +4 -4 subtract 4 from both sides to get 18x alone

180=18x

180/18= 18x/18 divide both sides by 18 to get x alone

10= x

x=10

Side PS= 5x since it is parallel to RQ which is 5x

5(x)=5(10)=50

Answer:

what trapezoid? please provide the trapezoid so I can help you

The number of rows and columns in the specified matrix and the matrix element are; 2 rows and 3 columns, the correct option is therefore;

a. 2 × 3; 1, which is option A

The common form of denoting the elements in a matrix is by using a letter and two subscripts in the form; A[tex]_{ij}[/tex].

The specified matrix can be presented as follows;

[tex]\begin{bmatrix}-4 &1 &-3 \\ 2& 1& 0 \\\end{bmatrix}, a_{12}[/tex]

The size of a matrix is indicated by the number of rows and columns in the matrix. The size of a matrix is usually indicated as m × n where;

m × n = Number of rows × Number of columns

Where;

m = The number of rows

n = The number of columns

The number of rows in the specified matrix are two rows

The number of columns in the matrix are three columns

The size of the specified matrix therefore is; 2 × 3

The position of a matrix element is similarly indicated by two subscripts, the first indicating the row number of the element and the second indicating the column number of the matrix.

Therefore;

a₁₂ is the element in the first row and in the second column, which is the number 1

The correct option is therefore;

a. 2 × 3; 1

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According to the solving, the approximate weight of 1 backpack is 7.98 pounds.

1 close to being exact. 2 loose; unrefined; rough. simply a roughly fitting fit. 3 very similar; nearly the same.

We use the kilogram as a unit of weight in everyday life under the assumption that the gravitational field around the globe is fairly constant because there is no practical, straightforward way to quantify mass. Scales must, however, be adjusted locally to account for the minor gravitational field fluctuation in various locations.

To find the approximate weight of one backpack, we can divide the total weight of the 5 backpacks by the number of backpacks. So:

Approximate weight of 1 backpack = Total weight of 5 backpacks / 5

Approximate weight of 1 backpack = 39.9 pounds / 5

Approximate weight of 1 backpack = is 7.98 pounds

Therefore, the approximate weight of 1 backpack is 7.98 pounds.

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We can start by finding the sum of the given numbers and equating it to the product of 20 and 8 (the number of elements):

6 + 29 + 3 + 14 + q + (q+8) + Q^2 + (q-10) = 20 * 8

Simplifying the left side by combining like terms, we get:

2q^2 + 20q - 100 = 124

Bringing everything to one side, we get:

2q^2 + 20q - 224 = 0

Dividing both sides by 2, we get:

q^2 + 10q - 112 = 0

Now, we can use the quadratic formula to solve for q:

q = (-10 ± √(10^2 - 4(1)(-112))) / (2(1))

q = (-10 ± 18) / 2

So the possible values of q are:

q = 4 or q = -14

To verify, we can substitute these values back into the original equation and see if the mean is indeed 20:

For q = 4:

(6 + 29 + 3 + 14 + 4 + 12 + 16 + -6) / 8 = 20 (checks out)

For q = -14:

(6 + 29 + 3 + 14 - 14 - 6 + 196 + -24) / 8 = 20 (checks out)

Therefore, the possible values of q are 4 and -14.

The median of the given data is 78.

What is median?

The median is a measure of central tendency that represents the middle value in a set of data when the data is arranged in order from smallest to largest. It is the value that separates the upper half of the data from the lower half.

To calculate the median, the data must first be ordered. If the data set has an odd number of values, the median is the middle value. If the data set has an even number of values, the median is the average of the two middle values.

The median of the given data can be found by first arranging the data in order from smallest to largest:

3, 5, 78, 81, 90

In this case, there are five values, so the median is the middle value, which is 78.

Therefore, the median of the given data is 78.

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According to the solution we have come to find that, The correct value of x in the given equation is 30.

An equation is a mathematical statement that shows the equality between two expressions, usually containing variables and mathematical operations. In an equation, the expressions on both sides of the equals sign have the same value.

For example, the equation 2x + 5 = 11 is an equation that shows the equality between the expressions 2x + 5 and 11. To solve the equation, we need to find the value of the variable x that makes the equation true.

Martina solved the equation x + 14 = 44 as follows:

x + 14 = 44

x = 44 - 14

x = 30

The error that Martina made is that she forgot to subtract 14 from both sides of the equation. The correct solution should be:

x + 14 = 44

x = 44 - 14

x = 30

Therefore, the correct value of x in the given equation is 30.

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Answer: 5/8 as a fraction 0.625 as a decimal

Step-by-step explanation:

If sweatshirts cost $28.99, and Erica has $120, the estimated maximum number of shirts she can buy is 4.

The unit cost is approximated to $30 and used as the divisor of $120.

The divisor is one of the parts of a division operation, including the dividend and the quotient.

The total amount that Erica has = $120

The unit cost of sweatshirts =- $28.99 ≈ $30)

The estimated maximum number of shirts she can buy = 4 ($120 ÷ $30)

Thus, to estimate the maximum number of sweatshirts Erica can buy with her $120, the unit cost is approximated to $30 and used to divide the dividend.

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Answer: First, we need to find the length of the line segment MN. Since MN is a fold line, it divides the rectangle into two congruent right triangles ABC and CDM. We can use the Pythagorean theorem to find the length of MN:

AC² + CM² = AM²

Since AC = 16 cm and CM = 2 cm (half the width of the rectangle), we have:

16² + 2² = AM²

256 + 4 = AM²

260 = AM²

AM = sqrt(260) = 2sqrt(65) cm

Since MN is the hypotenuse of right triangle ACM, we have:

MN = 2AM = 4sqrt(65) cm

Now, let's draw a line segment from B to MN, perpendicular to MN, and let the intersection point be E. Since triangle ABN is similar to triangle CDM, we have:

BN/DM = AB/CD

BN/2 = 4/16

BN = 1 cm

Since triangle BEN is a right triangle, we can use the Pythagorean theorem to find the length of BE:

BE² + EN² = BN²

BE² + (MN - DM)² = 1²

BE² + (4sqrt(65) - 2)² = 1

BE² + 64*5 - 16sqrt(65) + 4 = 1

BE² = -64*5 + 16sqrt(65) - 3

BE = sqrt(-64*5 + 16sqrt(65) - 3)

Note that BE is an imaginary number, which means that point E is actually below line segment MN. Therefore, the area of pentagon ABNMD' is zero.

Step-by-step explanation:

================================================

Explanation:

Grab some graph paper or use GeoGebra.

Place point A at the origin (0,0). Move 16 units to the right to plot B at (16,0).

Then move 4 units up to get to C(16,4). Then move 16 units left to arrive at D(0,4)

Here are the four points so far:

Next draw a line through A and C.

The equation of line AC is y = 0.25x; I'll skip the steps showing how I got that equation. But let me know if you need to see those steps.

The perpendicular bisector of segment AC is the equation y = -4x+34. Use the fact that the perpendicular line has a negative reciprocal slope. Meaning the slope 0.25 has the negative reciprocal -4. Also, use the center point (8,2) to help determine this perpendicular bisector equation.

Why is the perpendicular bisector so important? It's the mirror line. We'll reflect C over this line to land on A.

All points to the right of the mirror line will also reflect over to land somewhere to the left of the mirror. This will form the pentagon ABNMD where segment NM is the mirror line.

-----------

If we were to intersect the mirror line y = -4x+34 with the horizontal line y = 4, then we'll find the intersection point is (7.5,0) which is the location of point M in the diagram below.

Intersect y = 0 (aka the x axis) with y = -4x+34 to find the location of point N(8.5, 0)

So we should have

M = (7.5, 0)

N = (8.5, 0)

-----------

Pentagon ABNMD is composed of the following triangles

But notice carefully that triangle NPQ has folded over mirror line MN to land exactly on top of triangle ABN. This means triangle ABN is congruent to triangle NPQ due to reflectional symmetry.

Also due to the symmetry of the fold, triangle ADM = triangle NPQ

Because of symmetry we have:

Apply the transitive property to find triangle ADM = triangle ABN

-----------

area of triangle ADM = 0.5*base*height

area of triangle ADM = 0.5*MD*AD

area of triangle ADM = 0.5*7.5*4

area of triangle ADM = 15

Therefore, triangle ABN is also 15 square cm as well.

area of triangle MNA = 0.5*base*height

area of triangle MNA = 0.5*AN*4

area of triangle MNA = 0.5*8.5*4

area of triangle MNA = 17

-----------

Summary of the triangle areas:

Therefore,

pentagon ABNMD = (triangle ADM)+(triangle MNA)+(triangle ABN)

pentagon ABNMD = (15)+(17)+(15)

pentagon ABNMD = 47 square cm is the final answer.

The diagram is shown below. I used GeoGebra to make it. The diagram is to scale.

Notes:

The correct option is  [tex]r^{-42}[/tex] is not equivalent to [tex](r^{-7} )^{6}[/tex] .

Variables, constants, and mathematical operations like addition, subtraction, multiplication, division, and exponentiation can all be found in an algebraic statement. In many branches of mathematics, science, engineering, and finance, issues are represented and solved using algebraic expressions.

The expression [tex](r^{-7} )^{6}[/tex] can be simplified using the rule of exponentiation which states that raising a power to another power involves multiplying the exponents. Applying this rule, we get:

[tex](r^{-7} )^{6}[/tex]   = [tex]r^{-42}[/tex]

Therefore, the expression  [tex](r^{-7} )^{6}[/tex]  is equivalent to  [tex]r^{-42}[/tex], which is the first option given.

Option 1:  [tex]r^{-42}[/tex] is not equivalent to [tex](r^{-7} )^{6}[/tex] .

Option 2: 1/ [tex]r^{-42}[/tex] is also not equivalent to [tex](r^{-7} )^{6}[/tex] .

Option 4: [tex]r^{-1}[/tex] is also not equivalent to  [tex](r^{-7} )^{6}[/tex] .

Therefore, the correct option is (a)  [tex]r^{-42}[/tex].

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Answer:

A

Step-by-step explanation:

The missing values in the figure is solved using Inscribed Angle Theorem to get

x = 7

arc KL = 92 degrees

arc KLJ = 225 degrees

The arc length KL is solved with the knowledge that sum of arc length in a circle is 360 degrees

135 + 133 + KL = 360

KL = 360 - 135 - 133

KL = 92

Solving for x

inscribed angle = 0.5 * intercepted arc

5x + 11 = 0.5 * 92

5x + 11 = 46

5x = 46 - 11

5x = 35

x = 7

Arc KLJ

= 92 + 133

= 225

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Answer:

y = -50x + 500

Step-by-step explanation:

The equation is y = mx + b

m = the slope

b = y-intercept

Slope = rise/run or (y2 - y1) / (x2 - x1)

Pick 2 points (5,250) (7,150)

We see the y decrease by 100, and the x increase by 2, so the slope is

m = -100/2 = -50

Y-intercept is located at (0,500)

So, the equation is y = -50x + 500

Answer:

x = [tex]-\frac{2}{7}[/tex]

Step-by-step explanation:

Answer:

Step-by-step explanation:

there is an equation written in the question and one in the figure, to be sure I'll solve them both

Solve the equation.

7x +(4x - 5) = 3 + 2(x − 3)

7x + 4x - 5 = 3 + 2x - 6

7x + 4x - 2x = 3 - 6 + 5

9x = 2

x = 2/9  ( or 0.2repeating)

----------------------------------------------------------------------

7x + 1/2(4x - 5) = 3/2 + 2(x - 3)

7x + 2x - 5/2 = 3/2 + 2x - 6

7x - 5/2 = 3/2 - 6

14x - 5 = -9/2

14x = -9 + 5

14x = -4

x = -2/7 ( or 0.285714 repeating)

The sector has a central angle of 270° and the radius is 9m. So, the area of the sector is:

A_sector = (270/360) * π * (9m)^2 = 57.15m²

To find the area of the triangle, we need to find the height of the triangle. We can use the Pythagorean theorem to find the height:

h = √[(9m)^2 - (4.5m)^2] = √(81m^2 - 20.25m^2) = √60.75m^2 = 7.8m

The base of the triangle is 4.5m (half of the diameter), so the area of the triangle is:

A_triangle = (1/2) * 4.5m * 7.8m = 17.55m²

Therefore, the area of the shaded segment is:

A_shaded segment = A_sector - A_triangle = 57.15m² - 17.55m² = 39.6m²

Rounded to the nearest tenth, the area of the shaded segment is 39.6m².

The equation of the line of the best fit is ŷ = 1.05x + 1.70

From the question, we have the following parameters that can be used in our computation:

x 0 1 4 5 6 6 7 8 9 10

Y 1 3 7 6 8 9 9 10 11 12

Using a graphing tool we have the attached graph as the scatter plot and the line of best fit

From the attached graph, the equation of the best fit is

ŷ = 1.05x + 1.70

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Answer:

The following statements about Josiah's solution are true:

1. He predicted the number of rock songs on his MP3 player to be 300 songs. (This is stated in the problem description.)

2. His answer will be one-half of what he got because he did not divide 10 by 2 when setting up the proportion. (This is true, as he should have divided both the numerator and denominator of the first fraction by 2 to simplify it.)

3. He should have multiplied the numerator and denominator by 75, not 30, because 20 times 75 = 1,500. (This is true, as he needed to find a common multiple of 20 and 1,500 to set up the proportion correctly.)

According to given information the p-value for each sample mean is:

a. 0.001   b. 0.001   c. 0.074

What is meant by p-value?

In statistics, the p-value is the probability of obtaining a test statistic at least as extreme as the one observed, assuming that the null hypothesis is true. It is used in hypothesis testing to determine the statistical significance of the results.

To compute the p-value for each sample mean, we need to first calculate the corresponding z-score using the formula:

z = (x - μ) / (σ / [tex]\sqrt{(n)[/tex])

where x is the sample mean, μ is the population mean, σ is the population standard deviation, and n is the sample size.

a. For x = 18.0, the z-score is:

z = (18.0 - 20) / (9.31 / [tex]\sqrt{(167)[/tex]) = -3.28

Using a standard normal distribution table or calculator, we can find that the corresponding p-value is approximately 0.001.

b. For x = 21.8, the z-score is:

z = (21.8 - 20) / (9.31 / [tex]\sqrt{(167)[/tex]) = 3.28

Using a standard normal distribution table or calculator, we can find that the corresponding p-value is approximately 0.001.

c. For x = 21.3, the z-score is:

z = (21.3 - 20) / (9.31 / sqrt(167)) = 1.79

Using a standard normal distribution table or calculator, we can find that the corresponding p-value is approximately 0.074.

Therefore, sample of 167 items will be taken and the population standard deviation is 9.31 has the p-value for each sample mean is:

a. 0.001

b. 0.001

c. 0.074

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Answer:

8

Step-by-step explanation:

Answer: $505,000

Step-by-step explanation:

The salary difference between a teacher and a cashier is:

$42,630 - $17,380 = $25,250

This means that a teacher earns $25,250 more per year than a cashier.

To find out how much more a teacher would earn over a 20-year career, we need to multiply the salary difference by the number of years:

$25,250 x 20 = $505,000

Therefore, a teacher would earn $505,000 more than a cashier over a 20-year career.

Answer:

AngleABC = 30°

Step-by-step explanation:

In the diagram, the important measure you need to know to find the answer is the measure of Arc AC

Arc AC = 60°

Then you need to see where the vertex (point, corner) of the Angle ABC is. Since the vertex is ON the circle, the angle is HALF the arc.

(if the vertex was at the center, the angle and arc would be the SAME)

Since arc AC = 60°, angleABC = 30°

Answer:

----------------------------------

Volume of a rectangular prism is the product of its three dimensions:

Substitute values of dimensions from the picture into formula:

Answer:

Expanded Form of 2.327:

2.327 = (2 * 100) + (3 * 1/101) + (2 * 1/102) + (7 * 1/103)

2.327 = (2 * 1) + (3 * 1/10) + (2 * 1/100) + (7 * 1/1,000)

2.327 = 2 + 3/10 + 2/100 + 7/1,000

2.327 = 2 + 0.3 + 0.02 + 0.007

Answer:

To find the surface area of the three-dimensional figure, we need to first determine the shape of the figure. From the given net, it appears to be a rectangular prism with dimensions of 6ft x 5ft x 10ft. The surface area of a rectangular prism can be calculated by adding up the areas of all six faces. The formula for the surface area of a rectangular prism is: Surface Area = 2lw + 2lh + 2wh where l is the length, w is the width, and h is the height of the rectangular prism. Using the given dimensions, we can plug them into the formula and get: Surface Area = 2(6 x 5) + 2(6 x 10) + 2(5 x 10) Surface Area = 60 + 120 + 100 Surface Area = 280 square feet

Answer:

To determine the distance in kilometers, d, you can ride for $20, we can use the following inequality: 5 + 2.5d ≤ 20 Simplifying the inequality, we get: 2.5d ≤ 15 d ≤ 6 Therefore, the maximum distance you can ride for $20 is 6 kilometers.

In total you have $20.

Base fare of taxi is $5.

Per mile cost is $2.50.

Your total cost is  where x is the number of miles. Since you're on a budget of maximum $20, the cost should be less than or equal to $20. We can write:

[tex]5+2.5x\leq 20[/tex]

To find how many miles we can write, let's solve the inequality:

[tex]5+2.5x\leq 20[/tex]

[tex]2.5x\leq 20-5[/tex]

[tex]2.5x\leq 15[/tex]

[tex]x\leq \dfrac{15}{2.5}[/tex]

[tex]x\leq 6[/tex]

This means 6 is the maximum number of miles you can ride with $20.

ANSWER: Maximum 6 miles