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Neko [114]
3 years ago
12

Which equation is the direct variation equation if f(x) varies directly with x and f(x)=-2 when x=6

Mathematics
1 answer:
Agata [3.3K]3 years ago
7 0

Answer:

f(x)=-x/3

Step-by-step explanation

Given f is a direct variation equation (Direct variation is when one variable is equal to a constant times another variable, with no additions or subtractions alongside).

Now by the above condition let the constant be "c".Then

f(x)=cx

also given that f(x)=-2 whenx=6

on substituting the above values,

-2=c(6)

c=-2/6

c=-1/3

Therefore our equation is f(x)=-x/3

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my mum was 27 when I was born,8 years she was twice as old as I shall be in 5 years time. how old am I now?​
jeyben [28]

Answer:

THIS IS HARD

Step-by-step explanation:

8 0
2 years ago
Solve for p P-17=2p+3
Y_Kistochka [10]

Answer:

-20

Step-by-step explanation:

P-17=2P+3

P-2P=17+3

-P=20

Divide both sides by negative 1

P=20

7 0
3 years ago
( simultaneous equations)
daser333 [38]

Answer:

See method below.

Step-by-step explanation:

m/n + n/3 = 2

2/m + n = 4    

First  eliminate the fractions by multiplying the first equation by 3n:-

3m + n^2 = 6n...........(1)

and the second equation by m:-

2 + mn = 4m..............(2)

Now we solve using substitution:-

From equation  (2):-

4m - mn = 2

m = 2 / (4 - n)

Now substitute for m in equation (1):-

6/ (4 - n) + n^2 = 6n

6 + n^2(4 - n) = 6n(4 - n)

6 + 4n^2 - n^3 = 24n - 6n^2

n^3 - 10n^2 + 24n - 6 = 0

This will not factor so we could solve this using graphical software.

To find the values of the variable m we substitute the found values of n into one of the original equations and solve for m.






6 0
3 years ago
Use decimals to write the decimal number eight and four hundreths​
Lunna [17]

Answer: 8.040328

I don't know but hope it helps

3 0
2 years ago
Select the correct difference. -3z 5 - (-7z 5) (A)-10z5 (B)-4z5 (C)4z5 (D)4z
kogti [31]

Answer:

Correct choice is (C). 4z^5.

Step-by-step explanation:

Given expression is -3z^5-\left(-7z^5\right).

Now we need to simplify that then select the correct difference value from the given choices.

-3z^5-\left(-7z^5\right)

negative times negative is positive

=-3z^5+7z^5

Combine like terms because variable z has same exponent.

=(-3+7)z^5

=4z^5

Hence correct choice is (C). 4z^5.

8 0
3 years ago
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