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
Veronika [31]
3 years ago
10

I need this asap ty:p

Mathematics
2 answers:
Anastasy [175]3 years ago
7 0

Answer:

(a) x = -2y

(c) 3x - 2y = 0

Step-by-step explanation:

You can tell if an equation is a direct variation equation if it can be written in the format y = kx.

Note that there is no addition and subtraction in this equation.

Let's put these equations in the form y = kx.

(a) x = -2y

  • y = x/-2 → y = -1/2x
  • This is equivalent to multiplying x by -1/2, so this is an example of direct variation.

(b) x + 2y = 12

  • 2y = 12 - x
  • y = 6 - 1/2x
  • This is not in the form y = kx since we are adding 6 to -1/2x. Therefore, this is <u>NOT</u> an example of direct variation.

(c) 3x - 2y = 0

  • -2y = -3x
  • y = 3/2x
  • This follows the format of y = kx, so it is an example of direct variation.

(d) 5x² + y = 0

  • y = -5x²
  • This is not in the form of y = kx, so it is <u>NOT</u> an example of direct variation.

(e) y = 0.3x + 1.6

  • 1.6 is being added to 0.3x, so it is <u>NOT</u> an example of direct variation.

(f) y - 2 = x

  • y = x + 2
  • 2 is being added to x, so it is <u>NOT</u> an example of direct variation.

The following equations are examples of direct variation:

  • x = -2y
  • 3x - 2y = 0
BlackZzzverrR [31]3 years ago
3 0

Answer:

(a) x = -2y

(c) 3x - 2y = 0

Step-by-step explanation:

You can tell if an equation is a direct variation equation if it can be written in the format y = kx.

Note that there is no addition and subtraction in this equation.

Let's put these equations in the form y = kx.

(a) x = -2y

y = x/-2 → y = -1/2x

This is equivalent to multiplying x by -1/2, so this is an example of direct variation.

(b) x + 2y = 12

2y = 12 - x

y = 6 - 1/2x

This is not in the form y = kx since we are adding 6 to -1/2x. Therefore, this is NOT an example of direct variation.

(c) 3x - 2y = 0

-2y = -3x

y = 3/2x

This follows the format of y = kx, so it is an example of direct variation.

(d) 5x² + y = 0

y = -5x²

This is not in the form of y = kx, so it is NOT an example of direct variation.

(e) y = 0.3x + 1.6

1.6 is being added to 0.3x, so it is NOT an example of direct variation.

(f) y - 2 = x

y = x + 2

2 is being added to x, so it is NOT an example of direct variation.

The following equations are examples of direct variation:

x = -2y

3x - 2y = 0

You might be interested in
What is the axis of symmetry for f(x) = 2x − 8x + 8? (1 point) Select one: a. x = −2 b. x = −3 c. x = 3 d. x = 2
ExtremeBDS [4]

Answer:

x=2

Step-by-step explanation:

F(x) = 2x^2 - 8x +8

Axis of symmetry lies at the x coordinate of vertex

To find x coordinate of vertex use formula

x=\frac{-b}{2a}

from the given f(x) , a= 2 and b = -8

Plug in all the values

x=\frac{-(-8)}{2(2)}

x=\frac{8}{4}=2

x=2

So the axis of symmetry at x=2

6 0
3 years ago
Solve the equation. PLS
pochemuha

Answer:

n= 26, so the answer would be 'B'.

Step-by-step explanation:

n-8=18

n=18+8

n=26

4 0
3 years ago
Read 2 more answers
A cone has a diameter of 12 cm and a height of 9 cm. Find the volume.
Natali [406]

Answer:

339.3 cm. squared

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Find the volume of each figure. Round to the nearest hundredth if necessary.
Pavel [41]

Answer:

316.41 m³

Step-by-step explanation:

7.5x7.5x3.75=210.9375

3.75x3.75x7.5=105.46875

210.9375+105.4675=316.405

6 0
3 years ago
20 POINTS!! WILL GIVE BRAINLY!!
grin007 [14]

Answer:

1200in^2

Step-by-step explanation:

10 x 10 = surface area of 1 side

10 x 10 x 2 = volume of 1 side

10 x 10 x 2 x 6 = entire box

7 0
2 years ago
Read 2 more answers
Other questions:
  • Whats 95 closer to 64 or 125
    6·1 answer
  • What is the sum of the measures of two supplementary angles? 
    14·2 answers
  • Which is the correct solution to the expression 3 + 5^2? You can use a calculator to find the answer.
    15·1 answer
  • What is the measure of ZRVE?<br> 60°<br> 7<br> 8<br> mer<br> R
    15·2 answers
  • Double integral of e^y/x dy dx with outer limits as 0 and 2 and inner limits as 0 and x^2 ???
    12·1 answer
  • Find the length of GI in the triangle below. Show your work.
    7·2 answers
  • You bought items at Best Buy that rang up $143.75. You have a 30% discount and have to pay 9.5% sales tax.
    6·2 answers
  • Max and anna played a video game as a team. Max scored 463 points and Anna scored 329 points. How many points did they score?
    11·2 answers
  • Yall please help meee
    5·1 answer
  • What is the volume of this solid figure made with cubes?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!