What is the rate of change of y with respect to x for 9x-11y+2=0?

Answer:

2.5

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

ab - 0.5b

a = 1

b = 5

Step 2: Evaluate

Answer:

So, a + b = 3 + 3 = 6

Hence,

There will be 6 marbles in the bag, 3 red and 3 blue.

Step-by-step explanation:

In this question probabilities are not given which should be given in order to calculate the number of marbles in the bag.

So, let's assume the probability that both marbles are red = 0.5

And probability that both marbles are blue = 0.5

Total Probability = 1

Furthermore, Let's suppose the bag contains

a number of red marbles and b number of blue marbles.

This problem includes the concepts of combination.

So,

[tex]\frac{_{2} C^{a} }{_{2} C^{a+b} }[/tex] = 0.5      Equation 1

[tex]\frac{_{2} C^{b} }{_{2} C^{a+b} }[/tex] = 0.5      Equation 2

Dividing Equation 1 and equation 2  we will get

[tex]\frac{_{2} C^{a} }{_{2} C^{b} }[/tex] = 1

It means, we can write:

[tex]_{2} C^{a} = _{2}C^{b}[/tex]

Hence, we can conclude that:

a = b

Now, from equation 1, we can write:

[tex]\frac{_{2} C^{a} }{_{2} C^{2a} }[/tex] = 0.5

Breaking down the combinations, we will get:

[tex]\frac{\frac{a!}{2! (a-2)!} }{\frac{2a!}{2! (2a - 2)!} }[/tex] = 0.5

[tex]\frac{a ( a-1)}{2a (2a-1)} = \frac{1}{5}[/tex]

(a-1)5 = 4a - 2

5a - 5 = 4a - 2

5a -4a = 5-2

a = 3

As, we know, a = b

So, a + b = 3 + 3 = 6

Hence,

There will be 6 marbles in the bag, 3 red and 3 blue.

Answer: its C

Step-by-step explanation: Ive taken this question  dont know how but its C.

This data is Inaccurate Data

   Where are  

Divide first by 5:

Multiplye secondly by -2:

-2x - 2y = -200

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Answer:

We conclude that the price is 3.5 times the number of board games.

Hence, option B is true.

Step-by-step explanation:

We know that when y varies directly with x, the equation is

y ∝ x

y = kx

k = y/x

where 'k' is called the proportionality constant.

From the table,

For the point (2, 7)

k = y/x

  = 7/2

  = 3.5

For the point (4, 14)

k = y/x

   = 14 / 4

   = 7/2

    = 3.5

For the point (5, 17.50)

k  = y/x

   = 17.5 / 5

   = 3.5

For the point (9, 31.50)

k  = y/x

   = 31.50 / 9

   = 3.5

From the above calculations, we computed that the value of the proportionality constant remains the same.

Thus, the table of numbers represents a proportional relationship.

Therefore, the equation becomes

y = kx

The price of 2 board game

y = 3.5 (2)

  = 7

The price of 4 board game

y = 3.5 (4)

  = 14

Therefore, we conclude that the price is 3.5 times the number of board games.

Hence, option B is true.

Answer:

Form W-4

Step-by-step explanation:

Got a 100 on the test :)

The correct form which does an employee fill out to establish tax withholding from a paycheck is,

⇒ Form W - 4

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

To find for beginning a new job, which form does an employee fill out to establish tax withholding from a paycheck.

We know that;

Form W-4, Employee's Withholding Certificate, is generally completed at the start of any new job.

This form tells your employer how much federal income tax withholding to keep from each paycheck.

Hence, The correct form which does an employee fill out to establish tax withholding from a paycheck is,

⇒ Form W - 4

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Answer:

5/6

Step-by-step explanation:

Answer:

18.3% chance it will land on that particular side

Answer:

A. 20

Step-by-step explanation:

The two functions are equal at the point where the line of both function intercept. At this point, equilibrium is achieved.

The number chairs demanded and the number of chairs supplied are equal at this point.

Both lines intersect at x = 20. This means 20 (in hundreds) chairs must be sold for equilibrium to be achieved.

Answer: 63 cupcakes

Step-by-step explanation:

1. Find the amount it took to bake 3 cakes:

3*30=90 minutes

2. Subtract 90 minutes from total minutes(12 hours):

720 mins-90 mins=630 mins

3. Find how many cupcakes you can make in 630 mins:

630/10=63

Solved

Have a nice day :D  

Answer:

Jessicas current elevation is -20 feet.

Step-by-step explanation:

Start and 40 on the number line and make a straight line to -20 on the number line with dots at 40 and -20 on the number line

Answer:

g = 6

Step-by-step explanation:

5.2g + 10 = 2.2g + 28 (Given)

3g + 10 = 28 (Subtracted 2.2g on both sides)

3g = 18 (Subtracted 10 on both sides)

g = 6 (Divided 3 on both sides)

To check to make sure you are correct, simply substitute your answer for g:

5.2(6) + 10 = 2.2(6) + 28

31.2 + 10 = 13.2 + 28

41.2 = 41.2

You'll know you're correct if they both equal the same. In this case, the solution works.

Answer:

possibly you could use kid per candy, number of trickery treaters or something

you could explain lets say over the holidays Miss. So and So's class's kids got an average of around 4-6 Christmas presents while Miss. Mary Sue's class had  kids with 2 presents and kids with 12, since the range between 2-12 is bigger it had a greater standard of deviation

(hopefully this helps and I am not overcomplicating or incorrecting the standard of deviation, good luck)

To make 100 ml of 25% saline solution, Riley will need 50 ml = 12% saline mixture and 50 ml= 38% saline mixture.

Given,

We have 12% and 38% of saline mixtures.

We need to find the amount in ml from each saline mixture which would give us 100 ml of 25%.

What are the methods to solve a system of linear equations?

There are a number of methods but the most and easiest used method is the substitution method and the elimination method.

We can make two linear equations from the given statements.

Let x = amount from 12% saline mixture and y = amount from 38% saline mixture.

Now we need to make 100 ml of 25% saline.

so,

x + y = 100.

So we have two equations.

x + y = 100..............(1)

12% of x + 38% of y = 100 x 25%

0.12x + 0.38 = 25 ...............(2)

Using the substitution method we have,

x = 100 - y

Putting x = 100 - y in {2}

0.12 ( 100 - y ) + 0.38y

= 2512 - 0.12y + 0.38y

= 250.38y - 0.12y

= 25 - 120.26y = 13y

= 13 / 0.26y = 50.

Putting y = 50 in (1)

x + y = 100x

100 -50x = 50.

So Riley will need 50 ml = 12% saline mixture and 50ml = 38% saline mixture to make 100 ml of 25% saline solution.

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Answer:

69.04

Step-by-step explanation:

Given that:

Mean (m) = 69.0

Standard deviation (s) = 2.8

Zscore = 0.2

Find the corresponding height (x) ;

Using the relation :

Zscore = (x - m) / s

0.2 = (x - 69.0) / 0.2

0.04 = x - 69.0

0.04 + 69.0 = x

69.04 = x

Hence, the height of a man with a Zscore of 0.2 is 69.04

Answer:

Answer: B San Francisco

Step-by-step explanation:

It can be read that Geneva is 12°C colder than Nikki's hometown. It can be seen in the table that Geneva is at -3°C.

This means that Nikki's hometown is 12°C hotter than Geneva, thus:

Temperature of Nikki's hometown = -3°C + 12°C = 9°C.

The only city with a temperature of 9°C is San Francisco.

Answer: B San Francisco

Answer:

b 15 gallons of fuel for $60.50

Step-by-step explanation:

because 1 gallon of fuel is for $4.299

and when you multiply 15×4.299 the answer is 64.485 which is greater than the offer you are getting it for.

The price of sunglasses is greater original price and 0.45 is tax amount.

A tax is a mandatory fee or financial charge that a government imposes on a person or a business in order to raise money for public projects like building the greatest infrastructure and services.

Taxes are required financial contributions imposed by a government body, whether local, regional, or federal, on people or businesses. Tax revenues are used to fund a variety of government initiatives, such as Social Security and Medicare as well as public infrastructure and services like roads and schools.

Given:

Original price of sunglasses = $10.

Price according to cashier= $10.45

So, the price of sunglasses is greater original price.

and, the difference both price

= 10.45 - 10

= 0.45 is tax amount.

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Answer: 9/11

Step-by-step explanation:

Answer:

9/11

Step-by-step explanation:

3/22 * 6/1= 18/22

18/22 divided by 2 = 9/11

9514 1404 393

Answer:

  70°

Step-by-step explanation:

Angles 2 and 13 are alternate exterior angles, so are congruent. The value of x can be found by solving the equation that equates the expressions for the measures of these angles. Once x is found, the measure of angle 13 can be determined. The measure of angle 9 is the supplement of angle 13.

So, ...

  m∠2 = m∠13

  8x +14 = 10x -10

  24 = 2x  . . . . . . . .  add 10-2x

  12 = x

  m∠13 = 10x -10 = 10·12 -10 = 110

  m∠9 = 180° -110°

  m∠9 = 70°

Answer: 240

Step-by-step explanation:

You would multiply each of the sides to get the final answer of 240 (:

Answer:

Each fudge cookie has 80 calories.

Each lemon cream has 65 calories.

Step-by-step explanation:

We will let [tex]\ell[/tex] represent the calories in lemon creams and [tex]f[/tex] represent the calories in fudge cookies.

Two lemon creams and four fudge cookies together have 450 calories. So, we can write the following equation:

[tex]2\ell+4f=450[/tex]

And four lemon creams plus two fudge cookies together have 420 calories. So, we can write the following equation:

[tex]4\ell+2f=420[/tex]

We now have a system of equations. We can solve this by elimination.

For the first equation, we can multiply both sides by -2. This way, the [tex]\ell[/tex] will cancel when we add the two equations together.

So, the first equation becomes:

[tex]-4\ell-8f=-900[/tex]

Add this to the second equation. Hence:

[tex](-4\ell+4\ell)+(-8f+2f)=(-900+420)[/tex]

Simplify:

[tex]-6f=-480[/tex]

Divide both sides by -6. Hence:

[tex]f=80[/tex]

So, there are 80 calories in one cookie.

We can use the first equation again to find the amount of calories in one cream. We have:

[tex]2\ell+4f=450[/tex]

Substituting 80 for [tex]f[/tex] yields:

[tex]2\ell+320=450[/tex]

Then it follows that:

[tex]\ell=65[/tex]

So, there are 65 calories in each lemon cream.

Answer:

567

Step-by-step explanation:

Answer:

[tex]f^{-1}(x)= \frac{3}{2}(x+6)[/tex]

[tex]f(f^{-1}(x)) = f^{-1}(f(x))= x[/tex]

Step-by-step explanation:

Given

[tex]f(x) = \frac{2}{3}x - 6[/tex]

Required

Determine [tex]f^{-1}(x)[/tex]

[tex]f(x) = \frac{2}{3}x - 6[/tex]

Represent f(x) as y

[tex]y=\frac{2}{3}x - 6[/tex]

Swap the positions of x and y

[tex]x=\frac{2}{3}y - 6[/tex]

Add 6 to both sides

[tex]x+6=\frac{2}{3}y - 6+6[/tex]

[tex]x+6=\frac{2}{3}y[/tex]

Multiply both sides by 3

[tex]3(x+6)=\frac{2}{3}y * 3[/tex]

[tex]3(x+6)=2y[/tex]

Divide both sides by 2

[tex]\frac{3}{2}(x+6)=\frac{2y}{2}[/tex]

[tex]\frac{3}{2}(x+6)=y[/tex]

[tex]y= \frac{3}{2}(x+6)[/tex]

Replace y with [tex]f^{-1}(x)[/tex]

[tex]f^{-1}(x)= \frac{3}{2}(x+6)[/tex]

Justify the result:

First, we solve for [tex]f(f^{-1}(x))[/tex]

[tex]f(x) = \frac{2}{3}x - 6[/tex]

[tex]f(x) = \frac{2}{3}x - 6[/tex] becomes

[tex]f(f^{-1}(x)) = \frac{2}{3}x - 6[/tex]

Substitute [tex]\frac{3}{2}(x + 6)[/tex] for x

[tex]f(f^{-1}(x)) = \frac{2}{3}(\frac{3}{2}(x + 6)) - 6[/tex]

[tex]f(f^{-1}(x)) = \frac{2*3}{3*2}(x + 6)- 6[/tex]

[tex]f(f^{-1}(x)) = \frac{6}{6}(x + 6)- 6[/tex]

[tex]f(f^{-1}(x)) = 1*(x + 6)- 6[/tex]

[tex]f(f^{-1}(x)) = x + 6- 6[/tex]

[tex]f(f^{-1}(x)) = x[/tex]

Next, we solve [tex]f^{-1}(f(x))[/tex]

[tex]f^{-1}(x)= \frac{3}{2}(x+6)[/tex]

[tex]f^{-1}(x)= \frac{3}{2}(x+6)[/tex] becomes

[tex]f^{-1}(f(x))= \frac{3}{2}(x+6)[/tex]

Substitute [tex]\frac{2}{3}x - 6[/tex] for x

[tex]f^{-1}(f(x))= \frac{3}{2}(\frac{2}{3}x) - 6+6[/tex]

[tex]f^{-1}(f(x))= \frac{3}{2}(\frac{2}{3}x)[/tex]

[tex]f^{-1}(f(x))= \frac{2*3}{3*2}x[/tex]

[tex]f^{-1}(f(x))= \frac{6}{6}x[/tex]

[tex]f^{-1}(f(x))= 1*x[/tex]

[tex]f^{-1}(f(x))= x[/tex]

Hence:

[tex]f(f^{-1}(x)) = f^{-1}(f(x))= x[/tex]

Answer:

117

Step-by-step explanation:

The formula for a triangle is base times hight divided by two. So, 13 x 18 = 234, and 234/2 = 117

Answer:

x = 14

Step-by-step explanation:

(6x - 12)° + (8x - 4)° = 180° (Supplementary angles)

6x - 12 + 8x - 4 = 180

Add like terms

14x - 16 = 180

14x = 180 + 16

14x = 196

x = 196/14

x = 14