mathematics help pls lol

Answer:

Step-by-step explanation:

(2x-1)*(3x+4) = \(2x*3x + 2x(4)+(-1)*(3x)+(-1)(4)\)=6\(x^{2}\)\(+8x-3x-4\)=\(6x^{2} +5x-4\)

Answer:

-2

Step-by-step explanation:

It intersects with x-axis at -2 which is the x-intercept of the line.

Answer:

-2

Step-by-step explanation:

The x intercept is where the line crosses the x axis.

The line crosses where x = -2

The computation of the profitability ratios for Western Bookkeeping and Tax Service is as follows:

Profitability ratios are the financial ratios that evaluate an entity's ability to convert its earnings (revenue) into profit versus different criteria.

Some of the common profitability ratios include:

Stockholders' equity = $442,600

Total assets = $640,000

Net sales = $480,000

Net income = $36,000

Profit margin ratio = Net income/Net Sales x 100

= $36,000/$480,000 x 100

= 7.5%

= 8%

Return on equity ratio = Net income/Shareholders' Equity x 100

= $36,000/$442,600 x 100

= 8.13%

= 8%

Asset turnover ratio = Net Sales/Total Assets

= $480,000/$640,000

= 0.75

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\(\begin{cases} 3x+5y=50\\ x+5y=31\\[-0.5em] \hrulefill\\ x+5y=31\\ x = 31-5y \end{cases}\qquad \implies \stackrel{\textit{substituting in the 1st equation}}{3(31-5y)+5y=50} \\\\\\ 93-15y+5y=50\implies 93-10y=50\implies -10y=-43 \\\\\\ y=\cfrac{-43}{10}\implies \boxed{y=\cfrac{43}{10}} \\\\[-0.35em] ~\dotfill\\\\ x = 31-5y\implies x = 31-5\left( \frac{43}{10} \right)\implies x = 31-\cfrac{43}{2}\implies \boxed{x = \cfrac{19}{2}}\)

\(\stackrel{~\hfill \textit{\large total for 7x + 5y}}{7\left( \cfrac{19}{2} \right)+5\left( \cfrac{43}{10} \right)\implies \cfrac{133}{2}+\cfrac{43}{2}\implies \cfrac{133+43}{2}\implies \cfrac{176}{2}\implies 88}\)

16 & 81 are the missing frequencies if median and mode are 33.5 and 34.0 respectively.

To determine the missing frequencies, we need to use the information given about the median and mode.

First, let's find the position of the median in the cumulative frequency distribution. The total number of students is given as 230, so the median position will be (230 + 1) / 2 = 115.5. This means that the median falls within the 115th and 116th position in the ordered data.

Next, we need to determine the class interval that contains the median. Looking at the cumulative frequency distribution, we can see that the cumulative frequency just before the median position (115) is 34. This means that the median falls within the 30-39 class interval.

To find the missing frequency (f4) for the 30-39 class interval, we subtract the cumulative frequency of the previous class from the median position:

f4 = 115 - 34 = 81

So, the missing frequency for the 30-39 class interval is 81.

Next, let's determine the mode. The mode is the class interval with the highest frequency. From the given distribution, we can see that the highest frequency is for the 20-29 class interval. However, the mode is given as 34.0, which does not fall within the 20-29 class interval.

To determine the missing frequency (f3) for the 20-29 class interval, we need to distribute the difference in frequencies between the 20-29 and 30-39 class intervals proportionally based on the mode. The difference in frequencies is 81 - 16 = 65.

We can set up the following proportion:

(34 - 20) / (29 - 20) = f3 / (30 - 20)

Simplifying the proportion:

14 / 9 = f3 / 10

Cross-multiplying:

9f3 = 140

Solving for f3:

f3 = 140 / 9 ≈ 15.6

Since frequencies should be whole numbers, we round f3 to the nearest whole number, which is 16.

Therefore, the missing frequencies are:

f3 = 16

f4 = 81

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Answer:

\(8 {x}^{2} - 6x - 5 = x\)

\(8 {x}^{2} - 7x - 5 = 0\)

x = (7 + √((-7)^2 - 4(8)(-5)))/(2×8)

= (7 + √(49 + 160))/16

= (7 + √209)/16

= -.4661, 1.3411 (to 4 decimal places)

Answer:

Add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.

Step-by-step explanation:

:D

Answer:

-22=22

Step-by-step explanation:

3,5-5,7=

-22/22

The equation of the line passing through R and PQ is 4(y - 6) = -x - 1/2.

To find the equation of the line passing through the midpoint R and the points P and Q, we first need to find the coordinates of the midpoint R. The midpoint coordinates can be found by taking the average of the x-coordinates and the average of the y-coordinates of P and Q.

The x-coordinate of the midpoint R is (3 + (-5)) / 2 = -1/2.

The y-coordinate of the midpoint R is (5 + 7) / 2 = 6.

So, the coordinates of the midpoint R are (-1/2, 6).

Next, we can use the two-point form of the equation of a line, which states that the equation of the line passing through points (x₁, y₁) and (x₂, y₂) is given by:

(y - y₁) = (y₂ - y₁) / (x₂ - x₁) \(\times\) (x - x₁)

Substituting the coordinates of R (-1/2, 6) and P (3, 5) into the equation, we have:

(y - 6) = (7 - 5) / (-5 - 3) \(\times\)(x - (-1/2))

Simplifying the equation:

(y - 6) = (2 / -8) \(\times\)(x + 1/2)

(y - 6) = -1/4 \(\times\)(x + 1/2)

4(y - 6) = -x - 1/2

Therefore, the equation of the line passing through R and PQ is 4(y - 6) = -x - 1/2.

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Answer: 30.41 pesos

Step-by-step explanation:

$37 = 45 Ruthenian pesos

.: $1 ≅ 1.2161 Ruthenian pesos

Using cross multiplication:

.: $25 ≅ 30.4054 Ruthenian pesos

I'd round the answer to two decimal places, so you can get about 30.41 Ruthenian pesos for 25 US dollars :)

Answer:

77 cubed in.

Step-by-step explanation:

I think it is 77 cubed inches because the formula is V-bh

The probability that either event will occur is 0.33

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

Using the above as a guide, we have the following:

Total = A + B + C

So, we have

Total = 8 + 7 + 30

Evaluate

Total = 45

So, we have

P(A) = 8/45

P(B) = 7/45

For either events, we have

P(A or B) = 8/45 + 7/45

P(A or B) = 15/45

Evaluate

P(A or B) = 0.33

Hence, the probability that either event will occur is 0.33

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Answer:

Step-by-step explanation:

9300

Answer:

D: KD, CJ, JF

Step-by-step explanation:

I just took the quick check and it was right.

Answer:

x = 65

Step-by-step explanation:

the sum of the interior angles of a quadrilateral = 360°

sum the angles and equate to 360

x + 95 + 118 + 82 = 360

x + 295 = 360 ( subtract 295 from both sides )

x = 65

Answer: \(49\pi\)

Step-by-step explanation:

\(A=\pi r^{2}\)

if diameter is 14, the radius is 7

\(A=\pi 7^{2} \\A=49\pi\)

Answer:

8 miles

Step-by-step explanation:

At a rate of 2 miles in 10 minutes, in 40 minutes he can run 8 miles.

2 / 10 == x / 40

x == (40 * 2) / 10

x == 8

Cheers.

Answer:

Step-by-step explanation:

8

The value of x is -3 and y is 7 for equilateral triangle having x+1, 2x+4 and 3x+y sides.

We can use the fact that an equilateral triangle has equal lengths on each of its three sides to determine the values of x and y.

Given:

First side=x+y

second side= 2x+4

third side=3x+y

An equilateral triangle has three equal sides, hence the following equations can be constructed:

x + 1 = 2x + 4

2x + 4 = 3x + y

Let's tackle each of these equations separately:

x + 1 = 2x + 4

We will subtract x from both sides and subtract 4 from both sides in order to solve this equation:

x + 1 - x = 2x + 4 - x

1 = x + 4

By taking 4 away from both sides, we arrive at:

1 - 4 = x + 4 - 4 , -3 = x

Therefore, x has been determined to be -3.

Now, substitute the value of x in the second equation:

2x + 4 = 3x + y

2(-3) + 4 = 3(-3) + y

-6 + 4 = -9 + y

-2 = -9 + y

y = -2 + 9

y = 7

So, we determined that y has a value of 7.

As a result, the values of x and y are, respectively, x=-3 and y=7

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Answer:

Step-by-step explanation:

In an equilateral triangle all sides are equal.

So each of these sides (and their equations are equal to each other.)

To find x - set the first two (as they only involve x) equal to each other and solve.

x + 1 = 2x + 4

x -x + 1 = 2x - x + 4

1 = x + 4

1- 4 = x + 4 - 4

-3 = x

Then substitute -3 for x in the last equation to find y, also setting it equal to one of the other equations.

3(x) + y = x + 1

3(-3) + y = -3 + 1

-9 + y = -2

-9 + 9 + y = -2 + 9

y = 7

so x = -3 and y equal 7

Answer:

k= -8

Step-by-step explanation:

Answer:

x = 11/c

Step-by-step explanation:

Solve for x:

c x - 4 = 7

Hint: | Isolate terms with x to the left-hand side.

Add 4 to both sides:

c x = 11

Hint: | Solve for x.

Divide both sides by c:

Answer: x = 11/c

Answer: 6:1

Step-by-step explanation:

Answer:

<JLK

Step-by-step explanation:

Answer:

Step-by-step explanation:

The unknown parameters x and y represent number of car needed for the trip to the public library and number of large van needed for the trip to the public library respectively.

Simultaneous equation is a type of equation which helps to solve for two unknown values simultaneously.

The unknown values of x and y represent:

In conclusion, x and y are variables used to represent number of cars and number of large vans needed for the trip respectively.

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Answer:

a) This probability as empirical Probability.

b) This probability is not accurate because this experiment must be repeated a large number of times for empirical probabilities should be accurate.

Step-by-step explanation:

On 6 occasions, of which three times the train was late. that means 3 times the train is on time.

Empirical probability = Number of outcomes satisfying event / No.of trails

                                = 3/6 = 0.5.

a) This probability as empirical Probability.

b) This probability is not accurate because this experiment should be repeated a large number of times for empirical probabilities should be accurate.

Answer:

\( \frac{3( {5}^{8} - 1) }{5 - 1} = 292968\)

The length of AE¯¯¯¯¯ is 5√2 cm.

Since quadrilateral ABCD is a square, all four sides are congruent. Let's denote the length of one side as s. Therefore, the length of BD¯¯¯¯¯ is equal to s.

Given that the length of BD¯¯¯¯¯ is 10 cm, we can conclude that s = 10 cm.

Now, we need to find the length of AE¯¯¯¯¯. Looking at the square, AE¯¯¯¯¯ is the diagonal connecting opposite corners.

In a square, the diagonal divides the square into two congruent right triangles. We can use the Pythagorean theorem to find the length of the diagonal.

The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides.

In this case, the diagonal (the hypotenuse) is the same as the side length, s.

Applying the Pythagorean theorem:

s^2 = AE¯¯¯¯¯^2 + AE¯¯¯¯¯^2

10^2 = AE¯¯¯¯¯^2 + AE¯¯¯¯¯^2

100 = 2 * AE¯¯¯¯¯^2

AE¯¯¯¯¯^2 = 50

Taking the square root of both sides:

AE¯¯¯¯¯ = √50

Simplifying the square root:

AE¯¯¯¯¯ = √(25 * 2) = 5√2 cm

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Answer:

a)75%

b)96%

c)69.4%

d)85.2%

e)91.3%

Step by step explanation:

Given:

Mean=60

Standard deviation= 5

We were told to use chebyshev's theorem.to determine the percentage of the above given data within each of the following ranges

CHECK THE ATTACHMENT FOR DETAILED EXPLANATION.

Answer:

ok so u know that all triangles in the inside are equal to 180

Step-by-step explanation:

1. 180-162= 18 angle a is 18, now to solve for b 180-122-18=40, angle b is 40

2.180-171=9 angle a is 9, now to solve for b 180-128-9=43, angle b is 43

3.180-35-22=132 angle c is 132, now to solve for angle d 180-22=158, angle d is 158

4. 180-20-29=131 angle c is 131, now to solve for angle d 180-20=160, angle d is 160