if y is directly proportional to x^2 and y=216 when x=9 find y if x=19

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Answer 1
Sure. Let'd go eith tht

Related Questions

Help please!!! practical math

Answers

This is a problem that would take a very long time to do by hand. So a calculator is recommended. If you have a TI calculator (such as the TI 83) then use that. The calculator I'm going to use is GeoGebra. I've attached the results in the image attachment.

The line of best fit (aka the regression line) that GeoGebra produces is the equation y = 1.862 - 0.138 

Which means the answer is choice A

To make 5 apple pies, you need about 2 pounds of apples. How many pounds of apples do you need to make 20 apple pies?

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8 lbs. We have 2 lbs for every 5 pies so the first step is to find out how many sets of 5 we have. We find this out by dividing 20 by 5. 20 divided by 5 is 4, so we have 4 sets of 5. If for every one set, we need 2 lbs of apples, we need to multiply the number of sets by 2. 4*2 is 8, so 8 is our final answer.

answer plz got cunfused on question and cant solve

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area of parallogram now = 8*10 = 80 square units

 if the sides are multiplied by 4 the new dimensions would be

8*4 = 32, 10*4 = 40

 area would be 32 *40 = 1280 square units

1280 /80 = 16

 the area multiplied 16 times which is the multiple squared ( 4^2 = 16)

Why do some absolute value equations have no solution?

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Because both positive and negative values have a positive absolute value.
An absolute value is the distance from 0 on a number line so it must be a positive number, and so  because of that it is impossible to get or equal -1, this equation has no solution.

Solve the formula M = 2P + 3Q for the variable Q.

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To solve for the formula Q, simply rearrange the variables and factor the appropriate number.

M = 2P + 3Q

M - 2P = 3Q

(M - 2P)/3 = Q.

A rectangular room is three times as long as it is wide, and its perimeter is 56 meters. Find the length of the room.

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width = 7

length = 21

Simplify I − 0.3i


Hurry!

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i-0.3i=0.7i


because there is a 1 in front of i so you would be subtracting 1-0.3=0.7

hope you understood :)

It takes one machine 25 minutes to pick a bale of cotton and another machine 30 minutes to compete the same job. If both machines are used, how long will it take them to pick a bale of cotton?

Answers

Answer:

13.64 minutes

Step-by-step explanation:

The first machine works at the rate x = 1 bale/ 25 min.

The second machine works at the rate y = 1 bale/30 min.

The combined rate is

x + y = 1/25 + 1/30 bales/min

        = (30 + 25)/(25*30) = 55/750

        = 11/150 bales/min

The time for both machines to pick 1 bale of cotton is

(1 bale)/(11/150 bales/min) = 150/11 min = 13.64 min

So if you take rsm, you have to input 13.64 otherwise it won't work. :)

Paula has a digas that weighs 3 times as much as Carla's. The total weight of the dogs is 48 lb how much does Paula dog weigh. Draw a diagramar ti find the weighs of Pailas dog

Answers

the answer would be 48 divided by 3
so the answer would be 16
the answer is 16 because when u division

The length of a rectangle is 5 m less than double the width, and the area of the rectangle is 33 m^2 . Find the dimensions of the rectangle.

Please help ASAP!

Answers

A = Lw = 33m^2
(2w-5)w = 33
2w^2 - 5w - 33 = 0, w = 5.5m and L = 6
I think







A = L * W
A = 33
L = 2W - 5

33 = W(2W - 5)
33 = 2W^2 - 5W
-2W^2 + 5W + 33 = 0
(-2W + 11)(W + 3) = 0

-2W + 11 = 0
-2W = -11
W = -11/-2
W = 11/2 or 5.5

W + 3 = 0
W = -3.....not this one because it is negative

L = 2W - 5
L = 2(5.5) - 5
L = 11 - 5
L = 6

the dimensions are : length = 6 m and width = 5.5 m <==

Someone please help me with # 10

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where is the qustion


The point-slope form of the equation of the line that passes through (–4, –3) and (12, 1) is y – 1 = (x – 12). What is the standard form of the equation for this line?

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y= x-11   bc...
y-1=x-12
 +1   +1
y=x-11

Find dy/dx by implicit differentiation. x2 − 4xy + y2 = 4

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2x -4xydy/dx+ 2ydy/dx= 0
(2y-4xy) dy/dx = -2x
dy/dx = -2x / 2y-4xy

Write the equation in spherical coordinates. (a) 4z2 = 5x2 + 5y2 (b) x2 + 3z2 = 4

Answers

Refer to the diagram shown below.

The transformation from the Cartesian coordinate system (x,y,z) to the spherical coordinate system (r,θ,φ) is given by
x = rsinφcosθ
y = rsinφsinθ
z = rcosφ

Part a.
The given equation is 4z² = 5x² + 5y².
In spherical coordinates, obtain
4r²cos²φ = 5r²sin²φ cos²θ + 5r²sin²φ sin²θ
             = 5r²sin²φ(cos²θ + sin²θ)
             = 5r²sin²φ
4/5 = tan²φ
tanφ = 2/√5 = (2/5)√5

Answer:  tanφ = (2/5)√5

Part b.
The given equation is x² + 3z² = 4
In spherical coordinates, obtain
r²sin²φ cos²θ + 3r²cos²φ = 4

Answer:  r²(sin²φ cos²θ + 3cos²φ) = 4

Final answer:

In spherical coordinates, equations in the form of [tex]4z^2 = 5x^2 + 5y^2[/tex] can be written as [tex]4ρ^2cos^2(θ) = 5ρ^2sin^2(θ)[/tex], and equations in the form of x^2 + 3z^2 = 4 can be written as ρ^2sin^2(θ) + 3ρ^2cos^2(θ) = 4.

Explanation:

(a) In spherical coordinates, the equation [tex]4z2 = 5x2 + 5y2[/tex] can be written as [tex]4ρ2cos2(θ) = 5ρ2sin2(θ)[/tex]. Here, ρ represents the distance from the origin to the point and θ represents the angle measured from the positive x-axis to the point in the xy-plane.

(b) For the equation x2 + 3z2 = 4, we can rewrite it in spherical coordinates as[tex]ρ2sin2(θ) + 3ρ2cos2(θ) = 4.[/tex]

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Suppose that we have the least squares regression line y = 3 + 2x and that the sum of the squares of the errors (sse) for this line is 13,712. what can be said about the sum of the squares of the errors (sse) for this data set and the line y = 3 + 2.5x?

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Final answer:

The question involves linear regression and the sum of squared errors (SSE), which quantify the total deviation of the response values from the fitted line. If y=3 + 2x is the best-fit line, then the SSE for the line y=3 + 2.5x would be greater than 13,712.

Explanation:

The question involves the concept of linear regression and the sum of squared errors (SSE). The SSE of a regression line is quantified by the difference between the observed and predicted values of the dependent variable, each squared and added together. These show how well the regression line fits the data.

In the context of this question, you're given the SSE for the line y = 3 + 2x. However, you're asked about the SSE for the line y = 3 + 2.5x. Since the slope of this new line is steeper, the predicted y-values will be different from those from the original line and generally farther from the actual data points. Therefore, it can be said that if the line y = 3 + 2x is the best-fit line, then the SSE for the line y = 3 + 2.5x would be greater than 13,712.

Error in prediction is generally greater when we move away from the least-squares regression line. Thus the SSE provides a quantifiable way to determine the line that best fits the data.

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First right answer gets brainliest

Answers

Problem:
find line perpendicular to 4x+7y+3=0 passing through (-2,1).

Solution:
We will first find the general form of the perpendicular line.
The perpendicular line has the form
7x-4y+k=0 .........................(1)
by switching the coefficients of x and y, and switching the sign of one of the two coefficients.  This way, the slope of (1) multiplied by that of the original equation is -1, a condition that the two lines are perpendicular. The value of k is to be determined from the given point (-2,1).

To find k, we substitute x=-2, y=1 into equation (1) and solve for k.
7(-2)-4(1)+k=0
=>
k=14+4=18
Therefore the required line is
7x-4y+18=0

If you know the slope of a line and a point the line passes through, you can find the equation of the line using the formula:

y - y_1 = m(x - x_1)

You are given a point the line passes through, (-2, 1).
Now you need to slope of your line.
You are given the equation of a line that your line is perpendicular to.
The slopes of perpendicular lines are negative reciprocals.
If you find the slope of the given line, you can find the slope of the perpendicular line.

Given line:

4x + 7y + 3 = 0

Solve for y:

7y = -4x - 3

y = (-4/7)x - 3/7

The slope of the given line is -4/7.
The slope of the perpendicular is 7/4.

Now we can find the equation of the line using the given point and the slope we just found.

y - y_1 = m(x - x_1)

y - 1 = (7/4)(x - (-2))

y - 1 = (7/4)(x + 2)

4y - 4 = 7x + 14

7x - 4y + 18 = 0

Will Mark Brainliest/Help Asap! (3 questions)!

1)Jeannine runs for 45 minutes every day for exercise. It takes her 8 minutes to run a mile, and she spends 5 minutes stretching halfway through the run. If x represents the number of miles she runs, then 8x + 5 ≤ 45 represents the time she runs each day. What is the fewest number of miles Jeannine must run to complete her daily exercise?


2)Which equation best represents the situation?

Cara served pizza and punch at a party. Each pizza fed 6 people, and each guest received a glass of punch. If a glass of punch cost 50¢, and Cara spent $2.50 for each guest, what was the cost of each pizza?
A. x/6 + 0.50=2.50
B. 6x 0.5x=2.50
C. x/6 + 50=2.50
D. 6x - 2.50=0.50

3)Which inequality best represents the situation?

A contractor charges a flat rate of $150 plus $6 per square foot to install concrete. Tyler has $2500 to spend on a concrete patio. How many square feet can Tyler have installed?
A.2500 + 150 ≥ 6x
B.6x + 2500 ≥ 150
C.150 – 6x ≤ 2500
D.150 + 6x ≤ 2500

Answers

1) is 5
2) is A
and                              
3) is D
Answer 1: She must run 5 miles to compete her exercise. 8*5+5=45 Answer 2: Choice A, It would total 12 dollars per pizza. Each persons total is 2.50. So take away the 50 cents for the punch leaving 2 dollars per person for the pizza. 6 people can be fed by one pizza therefore at 2 dollars per person left over that would make the price of one Pizza 12 dollars. Answer 3: Question Incomplete

Convey 90 cubic feet into cubic yards

Answers

There are 3 feet in 1 yard, so 90/3 = x cubic yards

x = 30

30 cubic yards is your answer

hope this helps

A bird leaves its nest and travels 18 miles per hour downwind for x hours. On the return trip, the bird travels 3 miles per hour slower and has 5 miles left after x hours.

Answers

d = distance down wind d - 5 = distance back time = distance ÷ speed x = d/18 x = (d - 5)/(15) 
so d/18 = (d - 5)/15. Cross multiply 18d - 120 = 15d = 40-120 = -5d 24 = d so the whole trip assuming the bird gets back to the starting point is 48 miles..

How do the 3's compare in 350 and 403?

Answers

In 350, the 3 is in the hundred's place

in 403, the 3 is in the one's place

hope this helps

if the mechanical advantages of the component machines in the peeler are 2, 3, and 12, what is the overall mechanical advantage of the apple peeler?

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Final answer:

The overall mechanical advantage of an apple peeler with component mechanical advantages of 2, 3, and 12 is the product of these numbers, which is 72. This implies that the input force applied to the apple peeler is multiplied by 72 times.

Explanation:

The student is asking about the overall mechanical advantage of an apple peeler, which is a complex machine made up of components with individual mechanical advantages. To find the total mechanical advantage of a complex machine, you would multiply the mechanical advantages of each component together.

Given that the mechanical advantages of the component machines are 2, 3, and 12, we can calculate the overall mechanical advantage as follows:

Mechanical Advantage of Component 1: 2

Mechanical Advantage of Component 2: 3

Mechanical Advantage of Component 3: 12

To find the overall mechanical advantage, just multiply these together:

Overall Mechanical Advantage = 2 × 3 × 12 = 72

So, the overall mechanical advantage of the apple peeler is 72. This means the input force is multiplied 72 times.

Alice wants to use her savings ($48.40) to buy concert tickets that cost $17.50 each. how many tickets can she buy?

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so u divide 48.40 by 17.50 to get 2.77 but u cant buy a fraction of a ticket so she can buy 2

The surface area of a cube varies directly as the square of the length of an edge. true or false

Answers

The surface area of a cube is 6 times the surface area of one face.

If the side of the cube is x, then the surface area of one side is x^2, and the total surface area is 6x^2 (because there are 6 squares making up the surface of the cube).

Here, we have A(x) = 6 x^2, which DOES vary directly as the square of the length of an edge, denoted by x.

what is the equation of the perpendicular to y=2/3x+1 that passes through the point (12,-6)

Answers

well, first off let's check what is the slope of y = 2/3x+1.... .hmmmmm, notice    [tex]\bf y=\stackrel{slope}{\cfrac{2}{3}}x+1[/tex]  , since the equation is already in slope-intercept form, we can see it has a slope of 2/3.

well then, a line perpendicular to that one, will have a negative reciprocal to it.

[tex]\bf \textit{perpendicular, negative-reciprocal slope for slope}\quad \cfrac{2}{3}\\\\ slope=\cfrac{2}{{{ 3}}}\qquad negative\implies -\cfrac{2}{{{ 3}}}\qquad reciprocal\implies - \cfrac{{{ 3}}}{2}[/tex]

so, we're really looking for the equation of a line whose slope is -3/2 and goes through 12, -6.

 [tex]\bf \begin{array}{lllll} &x_1&y_1\\ % (a,b) &({{ 12}}\quad ,&{{ -6}}) \end{array} \\\\\\ % slope = m slope = {{ m}}= \cfrac{rise}{run} \implies -\cfrac{3}{2} \\\\\\ % point-slope intercept \stackrel{\textit{point-slope form}}{y-{{ y_1}}={{ m}}(x-{{ x_1}})}\implies y-(-6)=-\cfrac{3}{2}(x-12) \\\\\\ y+6=-\cfrac{3}{2}x+18\implies y=-\cfrac{3}{2}x+12[/tex]

Given the set s = { ∅, d, { d }, { { d } }, { { { d } } } }. determine the cardinality of the power set of s list the elements of the power set. to save writing, let v = ∅, w = d, x = { d }, y = { { d } }, and z = { { { d } } }.

Answers

[tex]S=\{\varnothing,d,\{d\},\{\{d\}\},\{\{\{d\}\}\}\}=\{v,w,x,y,z\}[/tex]

A set containing [tex]n[/tex] elements has a power set containing [tex]2^n[/tex] elements; here, [tex]|S|=5[/tex] so [tex]|\mathscr P(S)|=2^5=32[/tex].

The elements of the power set are all possible combinations of up to 5 of the total 5 elements to choose from:

0 choices (1): [tex]v[/tex] (since [tex]v=\varnothing[/tex])

1choice (5): [tex]\{v\},\{w\},\{x\},\{y\},\{z\}[/tex]

2 choices (10): [tex]\{v,w\},\{v,x\},\{v,y\},\{v,z\},\{w,x\},\{w,y\},\{w,z\},\{x,y\},\{x,z\},\{y,z\}[/tex]

3 choices (10): [tex]\{v,w,x\},\{v,w,y\},\{v,w,z\}[/tex] and so on

4 choices (5); [tex]\{v,w,x,y\},\{v,w,x,z\}[/tex] and so on

5 choices (1): [tex]\{v,w,x,y,z\}[/tex]

(1 + 5 + 10 + 10 + 5 + 1 = 32)

What is an equation of the tangent line at x = 4, assuming that f(4) = 3 and f '(4) = 2? (enter your answer as an equation using the variables y and x.)?

Answers

The general equation for a line in the case where the slope and one point on the line are known is y-b = m(x-a), where m is the slope and (a,b) is the point.

Here f(4) = 3 corresponds to the point (4,3), and f '(4) = 2 corresponds to the slope of the tangent line at that point.

Thus the equation of the tangent line here is

         y - 3 = 2(x - 4).

An alternative form of this equation would be y = 3 + 2x - 8, or
  
          y = 2x - 5

Name the triangle with the following characteristics. sides: 5 cm, 6 cm, 7 cm; Angles: 75° and 60°.

Answers

If the angles are below 90 degrees this would make this triangle an acute triangle 

The answer is: The triangle is a SCALENE Triangle.

As all the sides of the triangle are unequal. Therefore,it is a scalene triangle.

What are the 3 main types of triangles?

According to the length of sides, triangles can be classified into 3 categories i.e., Scalene, Isosceles, and Equilateral triangles.

A scalene triangle is a triangle in which all three sides are of different lengths, and all three angles are of different measures. However, the sum of all the interior angles is always equal to 180 degrees.

An isosceles triangle is a triangle in which two sides have the same length.

An equilateral triangle is a triangle with all three sides of equal length, corresponding to what could also be known as a "regular" triangle.

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Which figure represents an undefined term?

Answers

In geometry, an undefined term is a basic figure that cannot be defined in terms of other figures.
The undefined terms in geometry are: point, line and plane.

Since you have not attached any figures, I cannot tell you which one is correct. Just choose the figure that is either a point, a line or a plane.

Is -8.4 greater than or equal to 8.7

Answers

It is neither because it is less than 8.7

Answer:

Step-by-step explanation:

What is the equation of a line that passes through the point (2, 7) and is perpendicular to the line whose equation is y=x4+5 ?

Answers

Attached a solution and showed work.
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