1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nikolay [14]
3 years ago
11

Y is inversly proportional to x^3 y=28 when x=a work out the value of y when x=2a

Mathematics
1 answer:
sveta [45]3 years ago
8 0

Answer:

<h2>y = 7/2</h2>

Step-by-step explanation:

The above statement is written as

y =  \frac{k}{  {x}^{3} }

where k is constant of variation

y = 28 x = a

28 =  \frac{k}{ {a}^{3} }  \\   \\ k = 28 {a}^{3}

The formula for the variation is

y =  \frac{28 {a}^{3} }{ {x}^{3} }

when x = 2a

y is

y =  \frac{28 {a}^{3} }{( {2a)}^{3} }  \\ y =   \frac{ {28a}^{3} }{ {8a}^{3} }  \\  \\ y =  \frac{28}{8}  \\  \\ y =  \frac{7}{2}

Hope this helps you

You might be interested in
cyclists were 3/4 finished with their ride when they reached the 18 kilometer mark. how long was the ride
Trava [24]
<span>3 is to 4 as 12 is to x, or 3/4 = 12/x </span>
4 0
3 years ago
Read 2 more answers
PLEASE HELP ME.Math work: The Head Chef has asked you to create a delicious baked dessert that will have the same volume if it i
nikklg [1K]

Answer:

Large baking dish of cylinder, cone and sphere.

Step-by-step explanation:

When we compute the volume of each of the small and large baking dish taking \pi=3.14, we get

Volume of cylinder (small dish)= \pi(r^2)(h)

                                                  =3.14(\frac{3}{2})^2*3

                                                  = \frac{3.14*9*3}{4}

                                                 = 21.195

Volume of cylinder (large dish)= \pi(r)^2(h)= 3.14*(3)^2(3)

                                                  =84.78

Similarly, volume of cone (smaller dish)= \frac{1}{3} \pi r^{2} h

                                                            = 7.065

Volume of cone (larger dish)= 84.78

Volume of sphere(smaller dish)= \frac{4}{3} \pi r^{3}

                                                    = 14.13

Volume of sphere (larger dish) = 85.17 (approx)

Hence, we get that larger baking dish have approximately same volume.

Therefore, large baking dish of cylinder, cone, sphere will be chosen.

4 0
3 years ago
Tristan invested $470
Vlad1618 [11]
Well Tristan better get it together
7 0
3 years ago
Binomial factors of 6s2 + 40s – 64
11111nata11111 [884]
<span>the answer is 3 s– 4 </span>
7 0
3 years ago
Read 2 more answers
Which calculation will always give a result greater than 1?
masha68 [24]

Answer:

1 3/4 - a<3/4

proof:

1 3/4 -a<3/4

=>1 3/4 - 1 3/4 -a<3/4- 1 3/4

=>-a<-1

=>a>1

5 0
3 years ago
Other questions:
  • Find the magnitude of the vector.<br> (-2,-7)
    10·2 answers
  • 7+2=2+7 how do you do this and show your work
    6·1 answer
  • I want please help me as soon as possible I need help please help me
    14·1 answer
  • What is the simplest form of this expression? (x + 7)(3x − 8)
    15·1 answer
  • 19. Jessie is building a ramp for loading motorcycles
    6·1 answer
  • Factor the expression 84+28
    9·1 answer
  • F(x) = -3x+17 and g(x) = x^2 -6 find g(5)-f(5)
    9·1 answer
  • What is the equation for this parabola (located above) in vertex form?
    8·1 answer
  • How do you find the length of a line in a circle?<br>​
    8·1 answer
  • Answer the following regarding Momentum Change and Force
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!