Someone help me with this question ASAP and show work please and thank you

[tex]\left\{\begin{array}{ccc}2y+4x=18\\2y-3x=4&\text{add 3x to both sides}\end{array}\right\\\\\left\{\begin{array}{ccc}2y+4x=18&(**)\\2y=3x+4&(*)\end{array}\right\\\\\text{Substitute}\ (*)\ \text{to}\ (**):\\\\3x+4+4x=18\qquad\text{subtract 4 from both sides}\\7x=14\qquad\text{divide both sides by 7}\\\boxed{x=2}\\\\\text{Put the value of x to the first equation:}\\\\2y+4(2)=18\\2y+8=18\qquad\text{subtract 8 from both sides}\\2y=10\qquad\text{divide both sides by 2}\\\boxed{y=5}\\\\Answer:\ \boxed{x=2\ and\ y=5}[/tex]

Answer:

[tex]b=4\text { or }b=-2[/tex]

Step-by-step explanation:  

We have been given a rational expression: [tex]\frac{2b^2+3b-10}{b^2-2b-8}[/tex] and we are asked to find the illegal values of b.

Illegal values of b will be those values, which will make our denominator 0.

To solve for illegal or excluded values of b, let us set our denominator equal to 0.

[tex]b^2-2b-8=0[/tex]

We will factor out our equation by splitting the middle term.

[tex]b^2-4b+2b-8=0[/tex]

[tex]b(b-4)+2(b-4)=0[/tex]

[tex](b-4)(b+2)=0[/tex]

[tex]b-4=0\text { or }b+2=0[/tex]

[tex]b=4\text { or }b=-2[/tex]

Therefore, [tex]b=4\text { or }b=-2[/tex] are illegal values of b in the given fraction.

Answer:

formula

Step-by-step explanation:

3rd option is correct which is formula.

A mathematical relationship or rule which expressed only in symbols and which is the connection between two or more variable.

An equation that expresses a mathematical rule or relationship is a formula.

Learn more about Formula here :

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Answer:

50 and 26

Step-by-step explanation:

Make an equation! That makes it much simpler and has helped me a lot.

x+x-24=76

Combine like terms

2x+24=76

Add 24 on both sides

2x=52

Divide both sides by 2

x=26

72-26=50

To check that their difference is correct, subtract 26 from 50

50-26=24

Hope this helps!

Answer:

8P1 = 8

Step-by-step explanation:

Permutation  

The number of elements can be selected from a set of elements.

Let r be the number of elements want to select and n be the set of elements.

It can be written as nPr

nPr = n!/(n - r)!

To find 8P1

n= 8 and r = 1

8P1 = 8!/(8-1)! = 8!/7! = (8 x 7!)/7! = 8

Therefore 8P1 = 8

Answer:

the answer is

C

if i am wrong let me know

Step-by-step explanation:

Answer:

14

Step-by-step explanation:

The LCD is the LCM of the denominators, 7 and 2. Since these numbers have no common factors, their LCM is simply their product:

... 7·2 = 14

It's a vertical line. The slope of vertical line is undefined.

The equation of a vertical line is x = a (a - any real number).

Answer:

Slope = undefined

Step-by-step explanation:

A vertical STRAIGHT line that represents a slope is undefined.

Answer:

A.  Jian rounded the number of 4-ounce jars to 828 which is wrong. There are only 827 jars that can be completely filled.

B. Total number of 6-ounce jars = 551

Total money earned from 6-ounce jars = $4408

Step-by-step explanation:

A. Jian's family's collection = 3311 ounces

Number of 4-ounce jars = [tex]\frac{3311}{4}[/tex]

= 827.75

Jian rounded it to 828 which is wrong. There are 827 jars that can be completely filled.

Cost per 4-ounce jar = $5.

Total cost = 827 × 5 = 4135

B. Now, number of 6-ounce jars =  [tex]\frac{3311}{6}[/tex]

= 551.83

≅ 551 jars

Cost per 6-ounce jar = $8

Total cost = 551 × 8 = 4408

Answer:

Y=-3x+9

Step-by-step explanation:

Slope is found using

9-3 over 0-2

This gets 6/-2

This gets -3

-3 is the slope

9 is the y-intercept

Answer:

see explanation

Step-by-step explanation:

the equation of a line in slope- intercept fprm is

y = mx + b ( m is the slope and b the y-intercept )

y = [tex]\frac{5}{4}[/tex] x - 4 is in this form

with m = [tex]\frac{5}{4}[/tex] and b = - 4

Plot the point (0, - 4)

using the slope add 5 to the y-coordinate and 4 to the x-coordinate

(0, - 4 ) → (0 + 4, - 4 + 5) → (4, 1)  ← point on the line

Plot the points (0, - 4) and (4, 1) and draw a straight line through them to obtain a sketch of the graph

Answer:

For every 15 students scoring in the 60's there were 9 students scoring in the 70's.

Step-by-step explanation:

Your first step would be to rewrite the numbers into an easier to understand form like fractions, 45/3 and 27/3. Then you divide both numbers by 3, so you get comparable numbers. 45/3= 15, 27/3=9.

Answer:

Huma's share =Rs x =  Rs. 1.35392881

Seema's share =Rs. 12x =  Rs (12 *  1.35392881) = Rs. 16.2471457

Hubna's share =Rs. 123*12x =  Rs. (123*16.2471457) = Rs. 1998.39892

Step-by-step explanation:

Given :

Huma , Hubna and Seema received a total of ₨2,016 as monthly allowance from their mother.

Seema gets 12 of what Huma gets

Hubna gets 123 times Seema’s share

To find : How much money do the three sisters get individually?

Solution :

Let  Huma's share be Rs. x.

Since we are given that Seema gets 12 of  Huma's share

⇒ Seema's share = Rs 12x.

Since we are given that Hubna gets 123 times Seema’s share

⇒Hubna's share = Rs. (123 * 12x) = Rs. 1476x.

We are given that they received together Rs. 2016 in total .

⇒[tex]x+12x+1476x= 2016[/tex]

⇒[tex]1489x= 2016[/tex]

⇒[tex]x = \frac{2016}{1489}[/tex]

⇒[tex]x = 1.35392881[/tex]

Thus Huma's share =Rs x =  Rs. 1.35392881

Thus Seema's share =Rs. 12x =  Rs (12 *  1.35392881) = Rs. 16.2471457

Thus Hubna's share =Rs. 123*12x =  Rs. (123*16.2471457) = Rs. 1998.39892

Answer:

[tex]2\sqrt{5}[/tex]

Step-by-step explanation:

Geometric mean of two numbers of the square root of their product:

[tex]\sqrt{20}=\sqrt{4\cdot5}=2\sqrt{5}[/tex]

The geometric mean of 5 and 4 is [tex]2\sqrt{5}[/tex].

The Geometric mean of the two numbers formula is defined as the square root of the product of 2 numbers.

The following formula is used to calculate the geometric mean;

[tex]\rm Geometric \ mean = \sqrt{a \times b}[/tex]

Where a is the first term and b is the second term.

Therefore,

The geometric mean of 5 and 4 is;

[tex]\rm Geometric \ mean = \sqrt{a \times b}\\\\a=5 \ and \ b=4\\\\\rm Geometric \ mean = \sqrt{5 \times 4}\\\\\rm Geometric \ mean = \sqrt{20}\\\\\rm Geometric \ mean = 2\sqrt{5}[/tex]

Hence, the geometric mean of 5 and 4 is [tex]2\sqrt{5}[/tex].

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Answer:

Gabe needs 20 liters of the 40% solution.  

He also needs 40 liters of the 70% solution.

Step-by-step explanation:

Equation:

acid + acid = acid

0.40x + 0.70(60-x) = 0.60*60

40x + 70*60 - 70x = 60*60

-30x = -10*60

x = 20 liters

Gabe needs 20 liters of the 40% solution.  

He also needs 40 liters of the 70% solution.

Answer:

6400 fans will be pleased.

Step-by-step explanation:

Out of 150 fans, 120 were pleased. Assuming the same ratio, out of 8000 fans, 8000x120/150 = 6400 will be pleased.

Answer:

6400

Step-by-step explanation:

We need to find the fraction of fans that are pleased

120 out of 150 are please

120/150  = 12/15 =4/5

We multiply this fraction by the fans at the game

4/5 * 8000 = 6400

6400 fans should be pleased

The smallest diameter needed to drill through the wall is 0.75 inches, which is calculated by multiplying the inside diameter of the pipe (0.5 inches) by the ratio of the outside diameter to the inside diameter (1.5). Always measure and plan ahead to avoid mistakes.

The subject matter of this question is mathematics, specifically ratios. To find the smallest diameter you would need to drill into the wall, you would need to multiply the inside diameter of your pipe (0.5 inches) by the ratio of the outside diameter to the inside diameter (1.5). So, 0.5 inches * 1.5 = 0.75 inches.

This means, to allow the pipes to pass through the wall, you will need to drill a hole at least 0.75 inches in diameter. This is assuming the wall is thin enough that the entire length of the pipe that needs to pass through the wall is less than the thickness of the wall.

Remember, it's always better to pre-measure and plan ahead to avoid unnecessary work and potentially costly mistakes.

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[tex]\bf 7\div \cfrac{2}{3}\implies 7\cdot \cfrac{3}{2}\implies \cfrac{7\cdot 3}{2}\implies \cfrac{21}{2}\implies 10\frac{1}{2}~~\checkmark \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \stackrel{\textit{so, what happened to Mario?}}{7\div \cfrac{2}{3}\implies \cfrac{7}{1}\div \cfrac{2}{3}}\implies \stackrel{\boxed{?}}{\cfrac{1}{7}}\cdot \cfrac{3}{2}\implies \cfrac{3}{14}~~\bigotimes[/tex]

he ended up multiplying the 7 by the 2 for some reason.

and an explanation could be he used the reciprocal of both numbers mistakenly.

Answer:

c

Step-by-step explanation:

Answer:

x=4.4

Step-by-step explanation:

To get from A to B, the scale factor is 2.5, since 4*2.5 = 10

So, to get from B to A, you divide by 2.5.

11/2.5 = 4.4

Answer: 1.44

Step-by-step explanation:

1.2×1.2

1.2

1.2

__

24

120

__

144

Add two decimal places: 1.44

Answer:

1.44

Step-by-step explanation:

1.2^2 = 1.2 * 1.2

1.2 * 1.2 = 1.44

Your just finding the squad route of it. It can also be done the same way when your ^3 or even ^4 since its all timing the same number. Hope this helps out!

Answer:

1.  B. BD

2. C. 15

3. A. 2

Step-by-step explanation:

1.  From the figure,

∠DAB = ∠DAC

Therefore, BD is the bisector of ∠ABC.

2.  From the figure, IG = GH

3x = 5x - 10

10 = 5x - 3x

2x = 10

x = 5

So, GH = 5x - 10

= 5(5) - 10

= 25 - 10

= 15

Therefore, GH = 15.

3.  From the figure,

∠DAB = ∠DAC

10y = 8y + 4

10y - 8y = 4

2y = 4

y = 2

Answer:

11/20

Step-by-step explanation:

Answer:  [tex]\dfrac{11}{20}[/tex] represents the fraction of guests order the signature dish.

Step-by-step explanation:

Since we have given that

Percentage of guest who order the signature dish = 55%

Total percentage = 100

We need to find the fraction of guests order the signature dish.

So, Fraction of guests order the signature dish is given by

[tex]\dfrac{\text{Percentage of guest order the signature dish}}{\text{Total percentage}}\\\\=\dfrac{55}{100}\\\\=\dfrac{11}{20}[/tex]

Hence, [tex]\dfrac{11}{20}[/tex] represents the fraction of guests order the signature dish.

Answer:

3) TB and NT

4) ∠KLM and ∠MLK

Step-by-step explanation:

3) those two rays intersect to form the angle shown in the diagram

4) an angle can always be named from left to right or right to left as long as the middle letter is always the vertex of the angle

Answer:

Mr. Wright taught 1,050 students in 25 years.

Step-by-step explanation:

Given,

The number of students Mr. Wright taught = 18,

Also, every year the number of student is increased by 2,

So, in second year, the number of students = 18 + 2 = 20,

In third year = 20 + 2 = 22,

In fourth year = 22 + 2 = 24,

.............., so on,

Hence, we get an A.P. that shows the given situation,

18, 20, 22, 24, ............. till 25 years.....

First term, a = 18,

Common difference, d = 2,

And, number of terms, n = 25,

Hence, the total number of students that have been taught by him are,

[tex]S_n=\frac{n}{2}[2a+(n-1)d][/tex]

[tex]S_{25}=\frac{25}{2}[36+(25-1)2][/tex]

[tex]=\frac{25}{2}[36+24\times 2][/tex]

[tex]=\frac{25}{2}[36+48][/tex]

[tex]=\frac{25}{2}(84)[/tex]

[tex]=\frac{2100}{2}[/tex]

[tex]=1050[/tex]

Third option is correct.

Answer: 30%

Step-by-step explanation:

The first step is to find the increase in numbers

26-20= 6

Now you find the percent. This means you're looking for the percent 6 is equal to when compared to 20. The easiest way is to divide the increase by the original number

6/20= 0.3

To convert that to percent, multiply it by 100

0.3 * 100= 30%

There was a 30% increase.

Final answer:

To calculate the percentage increase of guests from August's first party to the second, subtract the initial number from the final number, divide by the initial number, and multiply by 100. The calculation shows a 30% increase in guests from 20 to 26.

Explanation:

The question asks to calculate the percentage increase in the number of guests from the first dinner party to the second dinner party hosted by August. To find the percentage increase, you subtract the original number of guests from the new number of guests, divide by the original number, and then multiply by 100 to get the percentage.

We start with the initial number of guests at the first party, which is 20, and the final number of guests at the second party, which is 26. Using the formula:

Percentage Increase = ((Final Number - Initial Number) / Initial Number) × 100

Percentage Increase = ((26 - 20) / 20) × 100

Percentage Increase = (6 / 20) × 100

Percentage Increase = 0.3 × 100

Percentage Increase = 30%

Therefore, the percentage increase of the number of guests from the first party to the second party is 30%.

To write a linear function with the given values f(3) = -4 and f(5) = -4, we can use the point-slope form of a linear equation. The linear function is y = -4.

To write a linear function with the given values f(3) = -4 and f(5) = -4, we can use the point-slope form of a linear equation. The formula for point-slope form is y - y1 = m(x - x1), where (x1, y1) is a point on the line and m is the slope. We can choose any point (x1, y1) from the given values. Let's choose (3, -4) as a point on the line. Now we can substitute the values into the formula to find the linear function:

y - (-4) = m(x - 3)

y + 4 = m(x - 3)

To find the slope, we can use another point on the line, such as (5, -4). Substituting the values into the formula, we get:

-4 + 4 = m(5 - 3)

0 = 2m

Solving for m, we get m = 0.

Now we can substitute the slope and one of the points back into the formula to find the linear function:

y + 4 = 0(x - 3)

y + 4 = 0

y = -4

So, the linear function with the given values is y = -4.

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Given values f(3) = -4 and f(5) = -4 suggest a horizontal line as the y-coordinate remains constant at -4 regardless of x values. Hence, the linear function is f(x) = -4.

The student wants to know how to write a linear function with the values f(3)=-4 and f(5)=-4. The first thing we need to understand here is that a linear function is represented by the equation y = mx + b, where y is the output, m is the slope, x is the input, and b is the y-intercept. In this problem, since f(3) = -4 and f(5) = -4, it indicates that the y coordinate remains the same (-4), thus forming a horizontal line despite the changes in the x coordinates. This means the function has a slope (m) of 0. So, the linear function that satisfies these conditions is f(x) = -4.

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Answer: cis (ln x) ; x > 0

Step-by-step explanation:

  [tex]x^i[/tex]

[tex]= e^{ln(x^i)}[/tex]

[tex]=e^{i \ln(x)}[/tex]

= cos (ln x) + i sin (ln x)

AKA: cis (ln x)

NOTE: I found this following formula which you may find useful:

[tex]A^i = x + iy[/tex]

Answer:

Step-by-step explanation:

If you round 4.3 to the nearest whole number, you will get 4.The reason is because a number less than 5 is closer to 4 but a number greater than five or is five will be rounded to five.

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Answer: x = 12.5

Step-by-step explanation:

P = (2, 5)

Q = (x, -3)

R = (7, 9)

[tex]d_{PQ}=d_{QR}[/tex]

[tex]d_{PQ}=\sqrt{(2-x)^2+(5+3)^2}, \quad d_{QR} = \sqrt{(x-7)^2+(-3-9)^2}[/tex]

[tex]\sqrt{(2-x)^2+(5+3)^2} = \sqrt{(x-7)^2+(-3-9)^2}[/tex]

[tex](2-x)^2+(5+3)^2 = (x-7)^2+(-3-9)^2[/tex]

[tex]4-4x+x^2+64 = x^2-14x+49+144[/tex]

[tex]4x+68 = -14x+193[/tex]

[tex]10x+68 = 193[/tex]

[tex]10x= 125[/tex]

x = 12.5