Solve the system of equations using subtraction.
4x - 2y = 10
4x + y = 19

y is inversely proportional to x: yx = k, such k is constant

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Given:

To determine the constant of variation, substitute the first two given values to the equation of variation.

To determine the value of y, substitute the second given value of x including the constant of variation.

Answer:

Wxndy~~

Answer:

14 times

Step-by-step explanation: add all colors up for total which is 25

since 7 out of the 25 total paper clips are yellow you would have a 7/25 chance of getting yellow after 1 pick.

since you pick and replace 50 times do  (7/25) X 50 which gives you 14 times yellow will be drawn.

Each folder would cost 0.0772.

Rate is used to express the change in a quantity with respect to a standard quantity.

Analysis:

If 100 file folders cost 7.72, then each folder will cost 7.72/100 = 0.0772

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Answer: 0.8 or whatever has 8 last since i forgot sorry!, but it was correct for me!

Step-by-step explanation:

I dont know if its right for you but its right for me

The number of speakers that should be sold to maximize profit is 0.9

Given the function that represents the profit made in selling x thousand Boombotix speakers expressed as:

P(x)=6+9x−5x^2

In order to maximize the profit, p'(x) = 0, hence;

P'(x) =9 - 10x

0 = 9 - 10x

x = 9/10

Hence the number of speakers that should be sold to maximize profit is 0.9

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Answer:

sometimes

Step-by-step explanation:

adjacent angles are two angles that share a vertex, common side/ray between them, and do not overlap.

only supplementary adjacent angles always add up to 180 degrees,

both x or y could be any angle, as long as they're sharing a common side and vertex.

Elijah will pass John after 5 hours, and they each will have traveled 310 miles. Then the correct option is C.

The distance covered by the particle or the body in an hour is called speed. It is a scalar quantity. It is the ratio of distance to time.

We know that the speed formula

Speed = Distance/Time

John and Elijah are both driving from New York City to Richmond.

John leaves at 7:20 and averages 60 mph (miles per hour) on the way.

Elijah leaves at 7:30 and averages 62 mph on the way.

The situation is modeled by this system, where x is the number of hours after Elijah leaves and y is the distance each will travel.

y = 60x + 10 ...1

y = 62x        ...2

The time is taken by Elijah to cross John will be

62x = 60x + 10

 2x = 10

   x = 5 hours

The distance traveled in 5 hours will be

y = 62 (5)

y = 310 miles

Elijah will pass John after 5 hours, and they each will have traveled 310 miles.

Then the correct option is C.

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Answer:

c

Step-by-step explanation:

i took the quiz

Answer:

x = 76.5

Step-by-step explanation:

[tex]\frac{x}{4.5}[/tex] = 22 - 5

[tex]\frac{x}{4.5}[/tex] = 17

x = 17 x 4.5

x = 76.5

Answer:

14 and a half

Step-by-step explanation:

5 eggs - 11 omlets

x eggs - 32 omlets

11x = 5x32

x = 160/11 = 14.5454...

Answer:

1156

Area = base times height

Area = (36-1-1) times (45-10-1)

=1156

Answer:

f(x) = x² - 13x + 42

Step-by-step explanation:

given zeros are x = 6 and x = 7 then the corresponding factors are

(x - 6) and (x - 7)

the quadratic function is then the product of the factors , that is

f(x) = (x - 6)(x - 7) ← expand using FOIL

     = x² - 13x + 42

Answer:

[tex]x = 14.04[/tex]°

Step-by-step explanation:

[tex]\text{tan(x) = Opposite / Adjacent}\\tan(x) = 5/20\\tan(x) = 0.25\\x = 14.04[/tex]

Answer:

12 feet

Step-by-step explanation:

Given that the trophy is 1.5 feet tall which casts a 2 feet shadow and the basketball hoop casts a 16 feet shadow, we can identify the height of the basketball hoop by doing (16÷2)×1.5= 12 feet

Hope this helps with your work

Using translation concepts, it is found that the equation of the function after the changes is given by:

[tex]y = \frac{3}{x + 3} + 4[/tex]

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.

In this problem, the parent function is given by:

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

Then, these following changes happened:

Hence, the equation of the function after the changes is given by:

[tex]y = \frac{3}{x + 3} + 4[/tex]

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Answer:

this is the hardest one yet gee

Step-by-step explanation:

2 + O = 2

The compound interest will be equal to $13.57.

The interest on a loan or deposit that accrues on both the initial principal and the accumulated interest from prior periods is known as compound interest.

The compound interest will be calculated by:-

[tex]CI = P(1+\dfrac{r}{12})^{12t}-P[/tex]

[tex]CI = 250(1+\dfrac{0.053}{12})^{12}-250[/tex]

CI = $13.57

Therefore the compound interest will be equal to $13.57.

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If f¹ is supposed to say f⁻¹ : rewrite f(4x + 5) as an "obvious" function of 4x + 5, then replace 4x + 5 with x. By "obvious", I mean make it clear how 4x + 5 is the argument to f.

[tex]f(4x+5) = 12x+18 = 3 (4x + 6) = 3 (4x + 5 + 1) = 3 (4x + 5) + 3[/tex]

Then swapping out 4x + 5 for x gives

[tex]f(x) = 3x + 3[/tex]

The inverse of f(x), if it exists, is a function f⁻¹(x) such that

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

Evaluate f at f⁻¹ and solve for f⁻¹ :

[tex]f\left(f^{-1}(x)\right) = 3 f^{-1}(x) + 3 = x \implies \boxed{f^{-1}(x) = \dfrac{x-3}3}[/tex]

If f¹ instead means f' (as in the first derivative of f) : earlier we found f(x) = 3x + 3, and differentiating this is trivial.

[tex]f(x) = 3x+3 \implies f'(x) = 3[/tex]

By eliminating the parameter t and evaluating the function at x = -1 we conclude that the parametric equations contains the point (x, y) = (-1, 0).

In this case we must determine if a point in rectangular format belongs to  a set formed by two parametric functions. The functions are parametric as they are based in a parameter t. A quick approach consist in reduce the number of equations by eliminating the parameter.

The first equation is represented below:

t = x/3

And the parameter is substituted in the second equation:

y = 18 · (x/3)² + 12 · (x/3) + 2

y = 2 · x² + 4 · x + 2

If we know that x = -1, then the y-value is:

y = 2 · (- 1)² + 4 · (- 1) + 2

y = 0

By eliminating the parameter t and evaluating the function at x = -1 we conclude that the parametric equations contains the point (x, y) = (-1, 0).

The statement is incomplete, the complete definition is presented below:

Which of the following is a point on the plane curve defined by the parametric equations?

x = 3 · t, y = 18 · t² + 12 · t + 2

A. (-1, 0)

B. (-3, -28)

C. (-1, 8)

D. (-3, 128)

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Answer: B; 4

Explanation: The squares means that's how many numbers there are.
The example : -- There's 4 of 4. = 16. 6 of 2. = 12.
All of them add up to 64.
There are 16 numbers.
The mean means adding up all the numbers then divide by how many numbers are there.
64 / 16 = 4.

Daniel made an error in line 3. He wrongly divided the sum of sides and height. The area of the trapezoid is 42 cm².

A trapezoid is a convex quadrilateral. A trapezoid has at least on pair of parallel sides.

Area of a trapezoid = 1/2  x (sum of the lengths of the parallel sides) x height

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Answer:5200-0.0005x=2800+0.0003x

Step-by-step explanation: Ignore the supply and demand stuff. Just focus on what value of x will make the two equations equal, which is all the question is asking.

5200-0.0005x=2800+0.0003x

solve for x

This is now a very simple one variable equation, try to solve this yourself and message me if you still need help.

Using proportions, it is found that the number of islands that each member will have to visit is given by:

c. 19 islands.

A proportion is a fraction of a total amount, and the measures are related using a rule of three.

In this problem, there are 684 islands, and 36 members, hence the number of islands per member is given by:

n = 684/36 = 19.

Which means that option c is correct.

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Answer:

We know that:

Neighbourhood A = 30  homes and the number increases by 20% each year

Neighbourhood B = 45  homes, and each year 3 new homes are built.

A.

Neighbourhood A and B are as follows:

For neighbourhood A: f(x) =

For neighbourhood B: f(x) =  45 + 3x

B.

Over five years:

Neighbourhood A has =

Neighbourhood A  =

Neighbourhood A  =  74.65 homes

Neighbourhood B: =   45 + 3(5)

Neighbourhood B: =   45 + 15

Neighbourhood B: =   60 homes

C.

To determine how many years the number of homes are the same for neighbourhood A and B, we need to equate both together.

So x= 3.3

so, hence after 3.3 years, the number of homes will be the same.

Step-by-step explanation:

Hope this helped, good luck

Answer:

Hi! The answer is B!

I would suggest using a graphing calculator to compare all the lines. You can use this free one called Desmos, sorry i was not able to attach a link :)

The factored expression of the expression 4a^3b^5 - 18a^2b^3 + 8a^3b^3 is 2a^2b^3(2ab^3 - 9 + 4a)

The expression is give as:

4a^3b^5 - 18a^2b^3 + 8a^3b^3

Factor out 2

2(2a^3b^5 - 9a^2b^3 + 4a^3b^3)

Factor out a^2b^3

2a^2b^3(2ab^3 - 9 + 4a)

Hence, the factored expression of the expression 4a^3b^5 - 18a^2b^3 + 8a^3b^3 is 2a^2b^3(2ab^3 - 9 + 4a)

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Answer:

it is 7.73

Step-by-step explanation:

Get smarter

Do subtraction

Answer:

The Answer is 7.73

Step-by-step explanation:

do some basic math lol

The graph that correctly shows the minimum amount due for a credit amount (x)  is graph B.

First of all, we would assign a variable to the different amount of money as follows:

Translating the word problem into an algebraic expression, we have;

For a bill of less than $100, the entire amount is due:

0 ≤ x < $100, therefore, y = x

For a bill of at least $100 but less than $500, the minimum due is $100: $100 ≤ x < $500, therefore, y = 100

For a bill of at least $500 but less than $1,000, the minimum due is $300:

$500 ≤ x < $1000, therefore, y = $300

For a bill of $1,000 or more, the minimum due is $500:

Since the credit limit is equal to $2000, we have $1000 ≤ x < $2000 and y = $500

In conclusion, the graph that correctly shows the minimum amount due for a credit amount (x)  is graph B.

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The property tax on a house with a market value of $170,000 is $2,959.09.

Property tax is a tax levied on the assessed value of property owned by an individual or a corporation.

Assessment rate = 46%

Tax rate = $37.84 per $1,000

Market value of house = $170,000

Assessed value = $78,200 ($170,000 x 46%)

Property tax = $2,959.09 ($78,200 x $37.84/$1,000)

Thus, the property tax on a house with a market value of $170,000 is $2,959.09.

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