Danny, Amira, and Tyler shared a sum of money in the ratio 6 : 4 : 3. Amira used 1/2 of her money to buy a watch that costs $30, and Danny gave 1/3 of his money to his sister. How much money did they have left altogether?

Answer:

UR BAD AT SPELLING KID

Step-by-step explanation:

Answer:

The expected value would be a gain of 1,5

Step-by-step explanation:

For any calculation of expecte value you should multiply the probability of every chance with his value or gain, for example, for this dice

If your roll 1

p(1) = 1/6, and his gain is -1

If your roll 2

p(2) = 1/6, and his gain is -2

If your roll 3

p(3) = 1/6, and his gain is -3

If your roll 4

p(4) = 1/6, and his gain is 4

If your roll 5

p(5) = 1/6, and his gain is 5

If your roll 6

p(6) = 1/6, and his gain is 6

So the expecte value would be

E = p(1)*(-1) + p(2)*(-2)+p(3)*(-3)+p(4)*(4)+p(5)*5+p(6)*6

p(1)=p(2)=p(3)=p(4)=p(5)=p(6)=1/6 because this dice is a cube, with even chances to fall in any face.

E = (1/6)*(-1-2-3+4+5+6)

E=(1/6)*(-6+15)

E=(1/6)*(9)

E=1,5

The expected value would be a gain of 1,5

Answer:

12

Step-by-step explanation:

There are 8 ounces in a cup

8*3=24

24/2(for 2 oz. containers)=12

Answer:

There were 12 full containers packaged for the sale.

Step By Step Explanation:

3 cups of lemonade equals 24 ounces. So take 24 divided by 2 and you get your answer of 12 full 2-ounce containers of lemonade packaged for the sale.

[tex]\vec f(x,y,z)=(2yze^{2xyz}+4z^2\cos(xz^2))\,\vec\imath+2xze^{2xyz}\,\vec\jmath+(2xye^{2xyz}+8xz\cos(xz^2))\,\vec k[/tex]

Let

[tex]\vec f=f_1\,\vec\imath+f_2\,\vec\jmath+f_3\,\vec k[/tex]

The curl is

[tex]\nabla\cdot\vec f=(\partial_x\,\vec\imath+\partial_y\,\vec\jmath+\partial_z\,\vec k)\times(f_1\,\vec\imath+f_2\,\vec\jmath+f_3\,\vec k)[/tex]

where [tex]\partial_\xi[/tex] denotes the partial derivative operator with respect to [tex]\xi[/tex]. Recall that

[tex]\vec\imath\times\vec\jmath=\vec k[/tex]

[tex]\vec\jmath\times\vec k=\vec i[/tex]

[tex]\vec k\times\vec\imath=\vec\jmath[/tex]

and that for any two vectors [tex]\vec a[/tex] and [tex]\vec b[/tex], [tex]\vec a\times\vec b=-\vec b\times\vec a[/tex], and [tex]\vec a\times\vec a=\vec0[/tex].

The cross product reduces to

[tex]\nabla\times\vec f=(\partial_yf_3-\partial_zf_2)\,\vec\imath+(\partial_xf_3-\partial_zf_1)\,\vec\jmath+(\partial_xf_2-\partial_yf_1)\,\vec k[/tex]

When you compute the partial derivatives, you'll find that all the components reduce to 0 and

[tex]\nabla\times\vec f=\vec0[/tex]

which means [tex]\vec f[/tex] is indeed conservative and we can find [tex]f[/tex].

Integrate both sides of

[tex]\dfrac{\partial f}{\partial y}=2xze^{2xyz}[/tex]

with respect to [tex]y[/tex] and

[tex]\implies f(x,y,z)=e^{2xyz}+g(x,z)[/tex]

Differentiate both sides with respect to [tex]x[/tex] and

[tex]\dfrac{\partial f}{\partial x}=\dfrac{\partial(e^{2xyz})}{\partial x}+\dfrac{\partial g}{\partial x}[/tex]

[tex]2yze^{2xyz}+4z^2\cos(xz^2)=2yze^{2xyz}+\dfrac{\partial g}{\partial x}[/tex]

[tex]4z^2\cos(xz^2)=\dfrac{\partial g}{\partial x}[/tex]

[tex]\implies g(x,z)=4\sin(xz^2)+h(z)[/tex]

Now

[tex]f(x,y,z)=e^{2xyz}+4\sin(xz^2)+h(z)[/tex]

and differentiating with respect to [tex]z[/tex] gives

[tex]\dfrac{\partial f}{\partial z}=\dfrac{\partial(e^{2xyz}+4\sin(xz^2))}{\partial z}+\dfrac{\mathrm dh}{\mathrm dz}[/tex]

[tex]2xye^{2xyz}+8xz\cos(xz^2)=2xye^{2xyz}+8xz\cos(xz^2)+\dfrac{\mathrm dh}{\mathrm dz}[/tex]

[tex]\dfrac{\mathrm dh}{\mathrm dz}=0[/tex]

[tex]\implies h(z)=C[/tex]

for some constant [tex]C[/tex]. So

[tex]f(x,y,z)=e^{2xyz}+4\sin(xz^2)+C[/tex]

The curl of a vector field can be calculated by finding the determinant of a 3x3 matrix constructed from the unit vectors, partial derivatives, and the components of the vector field. The existence of a function f(x,y,z) such that f⃗ =∇f would imply that the vector field is conservative, meaning it has zero curl.

In mathematics and vector calculus, the curl of a vector field is a vector operator that shows the rotation or the circular motion of the vectors in a vector field. It is denoted by ∇×F. The given vector field f⃗ (x,y,z)=(2yze^(2xyz)+4z²cos(xz²)î⃗ +(2xze^(2xyz)j⃗ +(2xye^(2xyz)+8xzcos(xz²))k). The curl can be obtained by finding the determinant of a matrix.

Consider a 3x3 matrix composed of î, ĵ, and k (in the first row), partial derivates (∂/∂x, ∂/∂y, ∂/∂z) (in the second row), and the vector field components (in the third row). Now, you need to calculate the determinant of this matrix to find the curl of the vector field.

The existence of function f(x,y,z) such that f⃗ =∇f would imply that the vector field is conservative. For a vector field to be conservative, it needs to have zero curl. So, once we have the curl, if it equates to zero, it implies the existence of such a function. Otherwise, no such function exists.

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Answer:

i feel like the answer is y=-3x - 1 but at the same time i think its wrong.

Step-by-step explanation:

Answer:y=-3x - 1

Step-by-step explanation:

Answer:

Answer to Create a simple fraction calculator that can add and subtract any number of fractions and writes the answer as a reduced... ... writes the answer as a reduced fraction. Your program will read input from stdin and write output on stdout.

Step-by-step explanation:

[tex]\bf f(x)=-2x^2+11x\implies \left. \cfrac{df}{dx}=-4x+11 \right|_{x=9}\implies -4(9)+11\implies -25[/tex]

Answer:

a) -25

Step-by-step explanation:

First you have to find the derivative of F(x):

[tex]f(x)=2x^{2} +11x\\Derivative=2(2x)+1(11)\\Derivative=4x+11[/tex]

Now you just have to calculate the vale of f(x) when x=9

[tex]-4x+11=\\-4(9)+11=\\-36+11=-25[/tex]

So when x=9, the derivative of [tex]f(x)=2x^{2} +11x[/tex] is equal to -25

Answer: To find the third side of a triangle (there are two answers you could get), you need to use the Pythagorean formula: a^2+b^2=c^2.  First answer, 3^2+5^2=c^2.  Solve for c.  c=5.83.  The second answer, 3^2+b^2=5^2.  Solve for b.  b=4.

\

Answer:

The answer is A. 755 m2; 815 m2

Step-by-step explanation:

The answer is A) 472m^2; 486 m^2.

Let a, b, and c be the sides of the base and h be the height of the prism

a = 2 m

b = 7 m

c = 7.28 m

h = 29 m

The lateral surface area is:

LA = a*h + b*h + c*h = h * (a + b + c)

LA = 29 * (2 + 7 + 7.28) = 29 * 16.28 ≈ 472 m²

The surface area is:

SA = LA + 2 * 1/2 * a * b

SA = 472 + 2 * 7 = 472 + 14 = 486 m²

Answer:

The lateral surface area is 755 sq.m. and total surface area is 785 sq.m.

Step-by-step explanation:

Let a, b, and c be the sides of the base and h be the height of the prism.

a = 5 m

b=6 m

c=11.21 m

h = 34 m

Lateral surface area of triangular prism = [tex](a+b+c)h[/tex]

                                                                 = [tex](5+6+11.21)34[/tex]

                                                                 =755.14 sq.m.

Total surface are of triangular prism = Lateral surface area + area of 2 triangles

                                                         =[tex]755.14+2 (\frac{1}{2} \times b\times h)[/tex]

                                                         =[tex]755.14+2 (\frac{1}{2} \times 5\times 6)[/tex]

                                                         =[tex]785.14[/tex]

Thus the lateral surface area is 755 sq.m. and total surface area is 785 sq.m.

Option B is correct.

Answer:

You should choose the last option because it is the most random at choosing salons to ask and so will give the least biased answer.

Step-by-step explanation:

ask the hair salon and they will tell you what hairstyle is hottest

Answer:   If you want to find out how much 20 percent of 5.4 is, you have to multiply, the equation would be

5.4 x .2 = 1.08, so it will give you 1.08 more

Step-by-step explanation:

Answer:

308.2 - 293.8 = 14.4 km

14.4 - 2.3 = 12.1

So the library is 12.1 km from the park.

Library is 12.1 km far from the park.

Distance is the total movement of an object without any regard to direction.

Given that, Aidan rode his bike 2.3 km from home to the library. Then he biked to the park. When he left home, his odometer read 293.8 km. When he reached the park, it read 308.2 km.

Total Distance reading in Odometer after reaching Library =

293.8  + 2.3 = 296.1 km

Reading in Odometer after reaching park = 308.2 km

308.2 - 296.1 = 12.1 km

Hence, Library is 12.1 km far from the park.

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Answer:

Option B. [tex]865.8\pi\ cm^{2}[/tex]

Step-by-step explanation:

we know that

The surface area of the cone is equal to

[tex]SA=\pi r^{2} +\pi rl[/tex]

we have

[tex]r=13\ cm[/tex]

[tex]h=52\ cm[/tex]

Find the slant height l

Applying Pythagoras \theorem

[tex]l^{2}=r^{2} +h^{2}[/tex]

substitute the values

[tex]l^{2}=13^{2} +52^{2}[/tex]

[tex]l^{2}=2,873[/tex]

[tex]l=53.6\ cm[/tex]

Find the surface area

[tex]SA=\pi(13)^{2} +\pi(13)(53.6)=865.8\pi\ cm^{2}[/tex]

Answer: I don't what your're asking but I guess it's 37 and 39.

Step-by-step explanation:

37- 38-39

Answer:

arcsin(x/4)

Step-by-step explanation:

Sinθ =x/4

θ= sin-¹(x/4)

θ= arc sin (x/4)

The expression represents θ in terms of x will be θ = arcsin (x/4).

The connection between the lengths and angles of a triangular shape is the subject of trigonometry.

Given that sin θ = x/4.

Then the expression represents θ in terms of x will be

sin θ = x/4

     θ = arcsin (x/4)

Thus, the correct option is B.

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Answer:

7,400

Step-by-step explanation:

First, we have to see that this is an arithmetic sequence... since to get the next element we add 1 to it.  (a geometric sequence would be a multiplication, not an addition)

So, we have a, the first term (a = 53), and we have the difference between each term (d = 1), and we want to find the SUM of the first 80 terms.

To do this without spending hours writing them down, we can use this formula:

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

If we plug in our values, we have:

[tex]S = \frac{80}{2} * (2 * 53 + (80 - 1) * 1) = 40 * (106 + 79 * 1)[/tex]

S = 40 * (106 + 79) = 40 * 185= 7,400

Answer:

none. he didn't pour water, he poured juice.

Step-by-step explanation:

Answer:

  [tex]15x^4y^5z^2[/tex]

Step-by-step explanation:

The applicable rule of exponents is ...

  (a^b)(a^c) = a^(b+c)

[tex]3xy^4z^2\cdot 5x^2yx=(3\cdot 5)x^{1+2+1}y^{4+1}z^2=15x^4y^5z^2[/tex]

_____

Comment on the rule of exponents

You can see where the rule comes from when you consider that an exponent signifies repeated multiplication.

x² = x·x . . . . . . the 2 signifies that x is a factor 2 times

x³ = x·x·x . . . . the 3 signifies that x is a factor 3 times

The product of these is ...

  (x²)(x³) = (x·x)(x·x·x) = x·x·x·x·x = x⁵ = x²⁺³

the answer for this question is ( d)

The least steep graph is y=1/2x+3.

Hence, the least steep graph is y=1/2x+3.

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Answer: First Option

[tex]A = 790.90 cm^2[/tex]

Step-by-step explanation:

The surface area of a circular cone is equal to the area of the cone surface plus the area of the circular base

[tex]A = \pi r ^ 2 + \pi rs[/tex]

Where r is the radius of the base and s is the inclined height of the pyramid.

In this case we know that:

[tex]r = \frac{19}{2}[/tex]

[tex]s = 17[/tex]

Then the surface area of the cone is:

[tex]A = \pi (9.5) ^ 2 + \pi (9.5)(17)[/tex]

[tex]A = 790.90 cm^2[/tex]

Answer:

618499.2

answer step by step

5%×13=65

65%×374848=243651.2

243651.2+374848=618499.2

For this case we have the following equation:

[tex]9 (w + 7) = 27[/tex]

To solve we follow the steps below:

We apply Distributive Property to the terms of parentheses:

[tex]9w + 63 = 27[/tex]

We apply Subtraction Property of equality by subtracting 63 from both sides of the equation:

[tex]9w + 63-63 = 27-63\\9w = -36[/tex]

We apply Division Property of equality by dividing by 9 on both sides of the equation:

[tex]\frac {9w} {9} = \frac {-36} {9}[/tex]

simplifiying

w = -4

Answer:

[tex]w = -4[/tex]

Answer:

0.375

Step-by-step explanation:

1/4= 0.25

0.25/2=1/8

0.125=1/8

0.125x3=3/8

0.375=3/8

The remaining portion of the pizza is 0.375.

A decimal is a number that consists of a whole and a fractional part.

Given that, Mikayla and her two friends made a pizza and cut it into 8 equal sized slices. Of which Makayla and her friends ate 5 slices of pizza,

The whole pizza be represented by 1,

Now, they sliced the pizza into 8 equal parts, and ate 5 of it,

Therefore,

Remaining = 1-5/8

= 3/8

= 0.375

Hence, the remaining portion of the pizza is 0.375.

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Answer:

−3(1.5n−1)−3(1.5n−1)

Step-by-step explanation:

To factor the expression −4.5n+3−4.5n+3, find the GCF between each term.  Using the GCF 3, divide each term by 3 and rewrite it as −3(1.5n−1)−3(1.5n−1).

The other options are not the factors because they give the wrong signs of at least one term in the expression.

−1.5(−3n+2)−1.5(−3n+2)  = 4.5n -3 + 4.5n - 3

−1.5(3n+2)−1.5(3n+2)  = -4.5n - 3 - 4.5n - 3

−3(1.5n+1) = -4.5n - 3

Answer:

60°

Step-by-step explanation:

The radius of the circle is given as 7 ( centre of circle to point C )

The other radius is also 7 ( from centre to point D)

CD = 7

The triangle is therefore equilateral ( all 3 sides = 7 )

The angles of an equilateral triangle are equal and measure 60°

Hence mCD = 60°

Answer:

Option C is correct.

Step-by-step explanation:

We need to find the values of a and b.

We are given:

[tex]8y^2-12y + 4 \,\,by\,\, 4y\\8y^2-12y +4/4y\\8y^2/4y -12y/4y +4/4y = a+b+1/y\\2y -3+1/y = a+b+1/y[/tex]

From the equation [tex]2y -3+1/y = a+b+1/y[/tex] we can find value of a and b

a = 2y and b= -3

So, Option C is correct.

Answer:

16

Step-by-step explanation:

1        1

1        2

1        3

1        4

2        1

2        2

2        3  

2        4

Three and four are done exactly the same way. the total is 16 ways.  

ANSWER

[tex] 96 \sqrt{3} {cm}^{2} [/tex]

EXPLANATION

The area of a regular polygon is

[tex]Area= \frac{1}{2} ap[/tex]

where 'a' is the apothem of the polygon and 'p' is the perimeter of the polygon.

From the diagram,

[tex] \sin(60) = \frac{a}{8} [/tex]

a=8sin(60)

[tex]a = 4 \sqrt{3} [/tex]

[tex] \cos(60) = \frac{l}{8} [/tex]

[tex]l = 8 \cos(60) [/tex]

[tex]l = 4[/tex]

The length of one side of the hexagon is 2×4=8.

The perimeter of the hexagon is

p=6×8=48

The area of the hexagon is

[tex] = \frac{1}{2} \times 4 \sqrt{3} \times 48[/tex]

[tex] = 96 \sqrt{3} {cm}^{2} [/tex]

Option: B is the correct answer.

         B)  0.31

Let A denote the event that a person is a sophomore.

Let B denote the event that a person has attended volleyball game.

A∩B denote the event that a person is a sophomore and attend volleyball game.

Let P denote the probability of an event.

We are asked to find:

P(A∩B)

From the table provided to us we see that:

A∩B=42

Hence,

P(A∩B)=42/137=0.3065 which is approximately equal to 0.31

         Hence, the probability is:

                      0.31

Answer: it's 0.48

Step-by-step explanation:

Answer:

y=5,902,060*(.957)^t

Step-by-step explanation:

Since the original amount would be decreasing and it's an exponential one, hence the "every year", we can determine that it's an exponential decay equation.

The exponential delay equation is y=A*(1-r)^t. The y is the remaining amount, A is the original amount, r is the rate in decimal form, and t is for years. "1-r" is for decreasing rates and "1+r" is for increasing rates.

First thing we need to do is turn the rate, 4.3%, from a percentage to a decimal. You can do this by moving the decimal two places to the right, which gives you 0.043.

Now plug the numbers into the equation.

y=5,902,060*(1-0.043)^t

Simplify what's inside the parenthesis and get your final equation.

y=5,902,060*(.957)^t

Answer:

F = 5,902,060(0.957)[tex]F = 5,902,060(0.957)^{t}[/tex]

Step-by-step explanation:

Answer:

Vertex: (0, 0); Focus: (0, -4); Directrix: y = 4; Focal width: 16 ⇒ answer (a)

Step-by-step explanation:

* Lets revise some facts about the parabola

- Standard form equation for a parabola of vertex at (0 , 0)

- If the equation is in the form  x² =  4py, then  

- The axis of symmetry is the y-axis,  x = 0  

- 4p  equal to the coefficient of y in the given equation to

  solve for  p

- If  p  >  0, the parabola opens up.

- If  p <  0, the parabola opens down.

- Use  p  to find the coordinates of the focus,  (0  ,  p)

- Use  p  to find equation of the directri ,   y= − p

- Use  p  to find the endpoints of the focal diameter,  (±2p  ,  p)

* Now lets solve the problem

- The vertex of the parabola is (0 , 0)

∵ -1/16x² = y ⇒ multiply each side by -16

∴ x² = -16y

∴ 4p = -16 ⇒ ÷ 4 tbe both sides

∴ p = -4

∵ The focus is (0 , p)

∴ The focus is (0 , -4)

∵ The directrix is y = -p

∴ The directrix is y = -(-4) = 4 ⇒ y = 4

∵ The endpoints of the focal diameter,  (±2p  ,  p)

∴ The focal width = 2p - (-2p) = 4p

∴ The focal width = 4 ×  I-4I = 16

* Vertex: (0, 0); Focus: (0, -4); Directrix: y = 4; Focal width: 16

Answer:

A

Step-by-step explanation:

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