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
Westkost [7]
3 years ago
10

Tell whether the equation represents direct variation. If it does find the

Mathematics
1 answer:
Vesnalui [34]3 years ago
3 0

Given:

The equation is

-12+8y+12=7x

To find:

The constant of direct variation if the given equation represents direct variation.

Solution:

If y is directly proportional to x, then

y\propto x

y=kx            ...(i)

Where, k is the constant of proportionality.

We have,

-12+8y+12=7x

8y=7x

y=\dfrac{7}{8}x          ...(ii)

At x=0,

y=\dfrac{7}{8}(0)

y=0

The equation (ii) passes through (0,0). So, it represents a proportional relationship.

On comparing (i) and (ii), we get

k=\dfrac{7}{8}

Therefore, the constant of proportionality is k=\dfrac{7}{8}.

You might be interested in
What IS 1 + 1 in monkey math?<br><br>WILL GIVE BRAINLIEST!!​
blsea [12.9K]
2 of course 1+1=2 ik what your talking ab
4 0
2 years ago
How many times does the equation f(x)=2x^2+9x-5 intersect the x-axis
Komok [63]

Answer:

2

Step-by-step explanation:

f(x)=2x^2+9x-5

When we are find how many times it intersects the x axis, we are finding the zero's. Set the equation equal to zero

0=2x^2+9x-5

Factor the equation

0 = (2x+1) (x-5)

2*1

1*-5 = -5

2*-5 +1*1 = -9

This checks for the first last and middle terms so we factored correctly

Then using the zero product property

2x+1 = 0 and x-5 =0

2x = -1    x=5

x = -1/2  and x=5

This function crosses the x axis 2 times

8 0
3 years ago
What are the x- and y-coordinates of point P on the directed line segment from A to B such that P is 1/3 the length of the line
Galina-37 [17]
I think answer should be the last option please give me brainlest let me know if it’s correct or not okay thanks bye
5 0
3 years ago
will give brainliest!!!!! will give brainliest!!!!! will give brainliest!!!!! will give brainliest!!!!! will give brainliest!!!!
Marrrta [24]

Answer:

849.24 cm²

Step-by-step explanation:

we know it is a cube so to find the surface area of each square you do

12x12=144 and there are 5 sides so 144x5=720

We know sides of the squares are 12 cm so half of that (6) would be the bottom of the triangle

Now using pythagorus you would do a²+b²=c²

15²+6²=c²

225+36=c²

√261=√c²

16.15=c       this only half of one of the sides of the pyramid so you would times 16.15 by 8 to equal 129.24

now add 720+129.24=849.24 cm²

6 0
3 years ago
Read 2 more answers
What is 5/6-1/8 equal
4vir4ik [10]

Sorry if I'm wrong - This is how I learned to subtract fractions in the 7th grade

First, I would line up the fractions side-by-side:

5/6      1/8

Then, my teacher would tell me to look at the numerators and subtract those - The answer would be 4

Next, she would say to do the same to the denominators - The answer is 2

4/2 is your answer I believe

Hope this helped! :)

8 0
3 years ago
Other questions:
  • 3(2x+1)=21 <br> Solve this multi-step equation using the distributive property
    9·1 answer
  • the strip of wood 78 inches long has to be cut into pieces of 3 3/4 inches long how many pieces can be cut
    11·1 answer
  • 25 1/5 - 17 5/6 <br><br> as a mixed number with the fractional part in lowest terms
    13·1 answer
  • What is the value of m?
    8·2 answers
  • What do large circus animals wear to keep their legs warm
    10·1 answer
  • Explain when you would not need to regroup any hundreds into thousands when multiplying a 4 digit number by a 1 digit number.
    8·1 answer
  • How much will a cube shaped box hold if each side measures 3.5ft
    9·1 answer
  • I
    12·1 answer
  • Can some one please help me with this thank you
    9·2 answers
  • Pretend we all live in the same house in the comments <br> Funniest gets brainliest.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!