A relation is called a function when each element in the domain is paired with
just one element from which of the following?
O
A. Inputs
O
B. Solution variables
O
C. Range
O
D. Independent variables​

Answer:

If x varies directly as y, then x=ky. y=5 and x=2.5 are substituted into x=ky to find k.

2.5=5k

k=2.5/5

k=5.

K =5 is substituted in x=ky to find y where x is 10.

x=5y

10=5y

y=10/2

y=2

Answer:  The required value of y is 20.

Step-by-step explanation:  Given that y is 5 when x is 2.5 and y varies directly with x.

We are to find the value of y when x is 10.

According to the given information, we can write

[tex]y\propto x\\\\\Rightarrow y=kx~~~~~~~~~~[\textup{where k is the constant of proportionality}][/tex]

When y = 5 and x = 2.5, then we have

[tex]5=k\times2.5\\\\\Rightarrow k=\dfrac{5}{2.5}\\\\\Rightarrow k=2.[/tex]

So, we get

[tex]y=2x.[/tex]

Therefore, when x = 10, then the value of y is

[tex]y=2\times10=20.[/tex]

Thus, the required value of y is 20.

Answer:

3 TERMS

Step-by-step explanation:

There are total 3 terms in the polynomial  [tex]x^{2} + xy - y^{2}[/tex] .

The given polynomial expression is  [tex]x^{2} + xy - y^{2}[/tex] .  

The number of terms of any expression is the total number of independent variables present in the given polynomial expression.

We can see that there are total 3 independent variables present in the polynomial expression and therefore the number of terms present is also three.    

Thus, there are total 3 terms in the polynomial  [tex]x^{2} + xy - y^{2}[/tex] .

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Answer:

D

Step-by-step explanation:

By definition for a right triangle with sides a, b, c, where c is the hypotenuse,

the following must be true:

a² + b² = c²

By using this formula on all the choices, we find that only D satisfies this formula

i.e.

for

a = √35 --------> a² = 35

b = √14 --------->b² = 14

c = 7 ------> c² = 49

a² + b² = 35 + 14 = 49 which is equal to the value of c² above

The correct answer is √35 , √14 , 7

Pythagoras' theorem that the square of a right triangle's hypotenuse is equal to the sum of the squares of the other two sides.

p^2 + b^2 = h^2 ( In a right angled triangle)

p = perpendicular of the triangle

b = base of the triangle

h = hypotenuse of the triangle

According to the Pythagoras theorem:

p^2 + b^2 = h^2 (In a right angled triangle)

In Option D

(√35)^2 + (√14)^2 = 7^2

49 = 49

Pythagoras theorem is followed in this triangle, hence it is a right angled triangle.

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Answer:

5x(2 - 3x³)

Step-by-step explanation:

10x-15x^4

The GCF( Greatest Common Factor) of 10x-15x^4 is 5x

Solve:

10x/5x = 2

-15^4/5x = -3x³

Final answer is

5x(2 - 3x³)

                         Check

5x(2 - 3x³)

distribute

5x(2) + 5x(-3x³)

10x - 15x^4

Answer:

5x(2 - 3x^3)

Step-by-step explanation:

The GCF is 5x 10x/5x=2 15x^4/5x=3x^3

Answer:

see explanation

Step-by-step explanation:

Given

2x² + 9x + 10 = 0

To factor the quadratic

Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 2 × 10 = 20 and sum = + 9

The factors are + 4 and + 5

Use these factors to split the x- term

2x² + 4x + 5x + 10 = 0 ( factor the first/second and third/fourth terms )

2x(x + 2) + 5(x + 2) = 0 ← factor out (x + 2) from each term

(x + 2)(2x + 5) = 0

Equate each factor to zero and solve for x

x + 2 = 0 ⇒ x = - 2

2x + 5 = 0 ⇒ 2x = - 5 ⇒ x = - [tex]\frac{5}{2}[/tex]

Answer:

1. x = 2

2. x = - 5/2

Step-by-step explanation:  First put parenthesis around the equation

( 2x^2 + 4x ) + ( 5x + 10) = 0

2x ( x+ 2) 5 (x + 2),

when you have the same answer inside the parenthesis you know your right.

2x + 5 = 0

x + 2 = 0

Next preform basic algebra

2x = -5  

sin(θ) < 0 is another way to say sin(θ) is negative.

tan(θ) < 0 is another way to say tan(θ) is negative.

let's recall that, on the III Quadrant sine and cosine are both negative, and thus the tangent is positive, recall tan(θ)=sin(θ)/cos(θ).

on the IV Quadrant however, sine is negative and cosine is positive, thus tangent is negative.

Answer:

B.)7√5

Step-by-step explanation:

2√5+ 5√5 = 7√5

we simply let √5  = x

therefore;

2√5+ 5√5 = 2x + 5x

2x + 5x = 7x

but x = √5

2√5+ 5√5 = 7√5

Answer:

Never.

Step-by-step explanation:

Answer:

12x

Step-by-step explanation:

We require the lowest common multiple of 4x, 3 and 2x

the lowest common multiple of 4, 3 and 2 is 12

the lowest common multiple of x and x is x

Combining the two gives lowest common multiple of 12x

Multiplying through by 12x gives

72x - 9 + 4x = 6 + 60x ← no fractions

Answer:

what is the question i dont get it

Step-by-step explanation:

Answer: Undefined

Step-by-step explanation: Since there is no change in x, and it is a horizontal line, that means that the denominator is zero. Dividing anything with the denominator being 0 will always be undefined (Not to be confused with the numerator, which is just dividing by 0, thus giving you 0.) That means that our answer will be undefined.

ANSWER

C. (0,4)

EXPLANATION

The given graph has equation:

[tex]y = 4( {3}^{x} )[/tex]

The y-intercept is where the graph touches the y-axis.

At this point the value of x is zero.

We substitute x=0 into the equation to obtain:

[tex]y = 4( {3}^{0} )[/tex]

Recall that any non-zero number exponent zero is 1.

This implies that,

[tex]y = 4( 1 ) = 4[/tex]

Hence the y-intercept is (0,4)

The correct answer is C.

Answer:

We need to solve the each side as though it is the hypotenuse:

AB: 6^2 + 5^2 = 61 => 7.81

BC: 8^2 + 5^2 = 89 => 9.43

CD: 4^2 + 3^2 = 25 => 5

DE: 4^2 + 2^2 = 20 => 4.47

EA: 2^2 + 5^2 = 29 => 5.39

Total 32.10 Units

Step-by-step explanation:

Please mark brainliest and have a great day!

Answer:

2,-1

Step-by-step explanation:

2x^2 -2x -4 =0

Factor out a 2

2(x^2 -x-2) =0

What 2 number multiply to -2 and add to -1

-2*1 = -2

-2 +1 = -1

2(x-2) (x+1) =0

Using the zero product property

x-2 = 0               x+1 = 0

x-2+2=0+2       x+1-1=0-1

x=2                   x=-1

Answer

πr^2 h/3

Step-by-step explanation:

pi radius squared multiplied by h/3

Answer: B.)      18x^2y^2 3squareroot 3xy^2

Step-by-step explanation:

Answer:

B. [tex]18x^{2} y^{2} \sqrt[3]{3xy^{2} }[/tex]

Step-by-step explanation:

To simplify this expression, use the fact that the root of a number (in this case is the cube root)  can be expressed like a fractional exponent (1/3). Using this, the expression changes to:

[tex]3x(648x^{4}y^{8})^{(1/3)}[/tex]

Next step is to put the exponent inside the parenthesis:

[tex]3x(648^{1/3}x^{4/3}y^{8/3})[/tex]

Find the prime factorization  of 648:

648 =3⋅3⋅3⋅3⋅2⋅2⋅2

648=3⁴∗2³

[tex]3x(3^{(4/3)}2^{(3/3)}x^{4/3}y^{8/3})[/tex]

Change all improper fractions in exponent to mixed fractions

[tex]3x(3^{1(1/3)}2^{1}x^{1(1/3)}y^{2(2/3)})[/tex]

Separate integers exponents from fractional:

[tex]3x(3\cdot3^{(1/3)}\cdot 2 \cdot x\cdot x^{1/3}\cdot y^{2}\cdot y^{2/3})[/tex]

Re-arrange (all numbers with fractional exponents must be together):

[tex]3x(3 \cdot 2\cdot x\cdot y^{2}\cdot 3^{(1/3)}x^{1/3}y^{2/3})[/tex]

Multiply the 3x with the numbers that have an integer exponent:

[tex]18x^{2}y^{2}(3^{(1/3)}x^{1/3}y^{2/3})[/tex]

Take out  the exponent 1/3 from the parenthesis:

[tex]18x^{2}y^{2}(3xy^{2})^{1/3}[/tex]

And change the representation of the root to use a radical symbol

[tex]18x^{2} y^{2} \sqrt[3]{3xy^{2} }[/tex]

Answer:

The direction of 5c + 4d is approximately 19.0° clockwise with

the positive part of x-axis

Step-by-step explanation:

* Lets talk about the direction of a vector

- If the vector is (x , y), then  

# Its magnitude is √(x² + y²)

# Its direction is tan^-1 (y/x)

- The direction is the angle between the positive part of x-axis and  

  the vector

* Lets solve the problem

∵ c = (2.4 , 0.45) and d = (7 , -4)

- To find 5c + 4d , multiply the two coordinates of c by 5 and the two

  coordinates of d by 4

# Multiply c by 5

∴ 5c = [5(2.4) , 5(0.45)]

∴ 5c = (12 , 2.25)

# Multiply d by 4

∴ 4d = [4(7) , 4(-4)]

∴ 4d = (28 , -16)

- Lets add 5c and 4d

∴ 5c + 4d = (12 , 2.25) + (28 , -16)  

∴ 5c + 4d = [(12 + 28) , (2.25 + -16)]

∴ 5c + 4d = (40 , -13.75)

- The vector is in the 4th quadrant because the x-coordinate is

 positive and the y-coordinate is negative

* Find the direction of 5c + 4d

∵ The direction is tan^-1 (y/x)

∴ The direction is tan^-1 (-13.75/40) = -18.97°

* The direction of 5c + 4d is approximately 19.0° clockwise with

 the positive part of x-axis

Answer:

$324.19

Step-by-step explanation:

First, find the price when marked down. Multiply 475 with 0.35:

475 x 0.35 = 166.25

Subtract 166.25 from the total cost:

475 - 166.25 = 308.75

Now, solve for the tax. Tax is 5% (0.05). Multiply 0.05 with the new cost:

308.75 x 0.05 = ~$15.44

Add 15.44 to the sales price:

308.75 + 15.44 = $324.19

$324.19 is your answer.

~

Answer:

(5,-1)

Step-by-step explanation:

4x+3y=17

3x+2y=13

So elimination sounds fun but we will have to do manipulation:

Multiply top equation by 2 and bottom equation by 3. This will cause the second term in both by 6y which means we would be setup for elimination.

8x+6y=34

9x+6y=39

--------------------now subtract the equations

-x+0=-5

So x=5

Now plug it into either question (no matter which-pick and choose)

I will go with the second original 3x+2y=13

So if x=5 we have 15+2y=13

Subtract 15 on both sides:        2y=-2

Now divide both sides by 2:      y=-1

Answer (5,-1)

Final answer:

To solve the simultaneous linear equations 4x + 3y = 17 and 3x + 2y = 13, the elimination method shows that the solution is x = 5 and y = -1.

Explanation:

To solve the simultaneous linear equations 4x + 3y = 17 and 3x + 2y = 13, one could use either the substitution method, the elimination method, or matrix methods. However, as per the guidance, we will follow the elimination method which is efficient and easily understandable.'

Let's multiply the first equation by 2 and the second equation by 3, which will give us:

8x + 6y = 34 (equation 1 multiplied by 2)

9x + 6y = 39 (equation 2 multiplied by 3)

Now, subtract the first new equation from the second new equation to eliminate y:

9x - 8x + 6y - 6y = 39 - 34

x = 5

Substitute x = 5 into one of the original equations to find y. For example, put x = 5 in 4x + 3y = 17:

4(5) + 3y = 17

20 + 3y = 17

3y = -3

y = -1

Therefore, the solution to the system of equations is x = 5 and y = -1.

Answer:

40 Miles Per Hour is 211,200 Feet per Hour, 3520 Feet Per Minute, and 58.67 Feet Per Second.

Answer:

The set {10 , 24 , 26} formed a right triangle

Step-by-step explanation:

* Lets explain how to check the sides lengths which formed a  

 right triangle

- In triangle ABC

# If AC is the longest side in length

# If (AC)² = (AB)² + (BC)²

∴ AB , BC , AC formed a right angle triangle  

∴ m∠B = 90°  (The angle opposite to the longest side)

∴ AC is the hypotenuse

* Now lets solve the problem

- In set 8 , 12 , 15

∵ The longest side is 15 cm

∴ (15)² = 225

∵ (8)² + (12)² = 64 + 144 = 208

∵ (15)² ≠ (8)² + (12)²

∴ The set not formed a right triangle

- In set 10 , 24 , 26

∵ The longest side is 26 cm

∴ (26)² = 676

∵ (10)² + (24)² = 100 + 576 = 676

∵ (26)² = (10)² + (24)²

∴ The set formed a right triangle

- In set 12 , 20 , 25

∵ The longest side is 25 cm

∴ (25)² = 625

∵ (12)² + (20)² = 144 + 400 = 544

∵ (25)² ≠ (12)² + (20)²

∴ The set not formed a right triangle

- In set 15 , 18 , 20

∵ The longest side is 20 cm

∴ (20)² = 400

∵ (15)² + (18)² = 225 + 324 = 549

∵ (20)² ≠ (15)² + (18)²

∴ The set not formed a right triangle

* The set {10 , 24 , 26} formed a right triangle

Answer: The 9th term is 6561

Step-by-step explanation:

The geometric sequences have the following formula

[tex]a_n = a_1(r)^{n-1}[/tex]

Where [tex]a_1[/tex] is the first term of the sequence and r is the common ratio between the consecutive terms of the sequence

In this case the sequence is   1 -3 9 -27

So [tex]a_1 = 1[/tex]

Observe that the common ratio  r is:

[tex]r=\frac{-3}{1}=\frac{9}{3}=\frac{-27}{9}=-3[/tex]

So the formula is:

[tex]a_n = (-3)^{n-1}[/tex]

We want to find [tex]a_9[/tex]

[tex]a_9 = (-3)^{9-1}[/tex]

[tex]a_9 = (-3)^{8}=6561[/tex]

Answer:

Probability

Step-by-step explanation:

Probability is the likelihood or chance of an event occurring. For example, the probability of flipping a coin and it being heads is ½, because there is 1 way of getting a head and the total number of possible outcomes is 2 (a head or tail). We write P(heads) = ½ .

[tex]\bf ~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ (4vy^{-9})\cdot (2x^{-6}x^6y^6)\cdot (3v^4)\implies 4vy^{-9}2x^{-6}x^6 y^6 3v^4 \\\\\\ 4\cdot 3\cdot 2vv^4y^{-9}y^6x^{-6}x^6 \implies 24v^{1+4}y^{-9+6}x^{-6+6}\implies 24v^5y^{-3}x^0 \\\\\\ 24v^5\cdot \cfrac{1}{y^3}\cdot 1\implies \cfrac{24v^5}{y^3}[/tex]

Answer:

I don't understand the question can you add more information or maybe show the page where you got this question?

Step-by-step explanation:

Answer:

the answer is zero

Step-by-step explanation:

Step-by-step explanation:

The ratio is the same each time (2/3), so this can be modeled as a geometric sequence.

an = a₁ (r)^(n-1)

where an is the nth term, a₁ is the first term, and r is the common ratio.

On the first rebound, the ball rises to 2/3 × 2 = 4/3, so a₁ = 4/3.

an = 4/3 (2/3)^(n-1)

On the sixth rebound, the ball rises to:

a₆ = 4/3 (2/3)^(6-1)

a₆ = 4/3 (32/243)

a₆ = 128/729

a₆ ≈ 0.176

Answer:

Step-by-step explanation:

It's 32, just follow the row when g=13.

Answer: We want to know f( g (13) ), here g(13) is just a number, so you are evaluating f in a number, first we need to know the value of g(13). Looking in the diagram you can see that g(13) = 16.

So f(g(13)) = f(16)

Also, looking in the diagram you can see that f(16) = 32

So, f ( g (32) ) = 32

Answer:

[tex]\large\boxed{d)\ 12}[/tex]

Step-by-step explanation:

[tex]x-\dfrac{1}{2}y=-6\\\\\text{y-intercept is for x = 0. Substitute:}\\\\0-\dfrac{1}{2}y=-6\\\\-\dfrac{1}{2}y=-6\qquad\text{multiply both sides by (-2)}\\\\\left(-2\!\!\!\!\diagup^1\right)\left(-\dfrac{1}{2\!\!\!\!\diagup_1}y\right)=(-2)(-6)\\\\y=12[/tex]