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3 years ago

Which of the following has a constant of proportionality of 2?

Mathematics

2 answers:

uysha [10]3 years ago

8 0

Answer : y= 2x

When y is directly proportional to x then

y = kx where k is the constant of proportionality.

y = 2x , the value of k is 2. so 2 is the constant of proportionality.

y = x + 2, the equation is not in the form of y=kx

2y = x , $y= \frac{x}{2}$ so constant of proportionality k is $\frac{1}{2}$

y + 2 = 2x , y = 2x -2 is not in the form of y=kx

denis-greek [22]3 years ago

6 0

Linear fonction's equation : y = ax

So only in y = 2x
2 is the constant of proportionality

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Evaluate the Expression When X=2, 3x-1=

Alex777 [14]

Answer:

Step-by-step explanation:

If X equals 2, then 3 times X would be 6. This is because if a number and a variable are put together, you have to multiply them. 6-1 is 5.

4 0

3 years ago

Make g the subject of this relation

zhannawk [14.2K]

Answer:

see explanation

Step-by-step explanation:

Simplify the radical

$\frac{U}{\frac{1}{f}+\frac{1}{g} }$

= $\frac{U}{\frac{g+f}{fg} }$

= $\frac{Ufg}{g+f}$

Square both sides

T² = $\frac{Ufg}{g+f}$ ( multiply both sides by (g + f) )

T²(g + f) = Ufg ( distribute left side )

T²g + T²f = Ufg ← subtract Ufg from both sides

T²g - Ufg + T²f = 0 ← subtract T²f from both sides

T²g - Ufg = - T²f ← factor out g from each term on the left side

g(T² - Uf) = - T²f ← divide both sides by (T² - Uf)

g = - $\frac{T^2f}{T^2-Uf}$ = $\frac{T^2f}{Uf-T^2}$

6 0

3 years ago

If the present value of an item is P

Mumz [18]

Answer:

$50,000

Step-by-step explanation:

Formula to find interest :

I = Prt

Solving :

I = (20,000)(0.06)(25)
I = (1.5)(20,000)
I = (30,000)

Future value :

P + I
20,000 + 30,000
$50,000

4 0

2 years ago

Can someone please help me please I really need help please answer it correctly

kvv77 [185]

Answer:

<h3>Princeton Florist</h3>

Let the total charge is y, the number of small arrangements is x.

Total charge will be:

y = 13x + 47

<h3>Chad's Flowers</h3>

Total charge will be:

y = 17x + 35

Since the total charge is same in both shops, we have:

13x + 47 = 17x + 35

Solve for x:

17x - 13x = 47 - 35
4x = 12
x = 3

Total cost is:

13*3 + 47 = 39 + 47 = 86

Small arrangements = 3, cost = $86

7 0

3 years ago

Help me with this please asap

Sloan [31]

Answer:

See below

Step-by-step explanation:

32. w + 5 = -20

w = -20 - 5

w = - 25

33. x - 17 = -32

x = -32 + 17

x = - 15

34. t + 7.2 = 1.65

t = 1.65 - 7.2

t = - 5.55

35. -0.4 = g - 4.9

g = - 0.4 + 4.9

g = 4.5

36. y - 2/5 = 1 3/5

y = 1 3/5 + 2/5

y = 1 5/5 or 2

37. -5 1/6 = 2 1/3 + p

p = - 5 1/6 - 2 1/3 convert 1/3 to x/6 for a common denominator

1/3 converts to 2/6

p = -5 1/6 - 2 2/6

p = - 7 3/6 or - 7 1/2

38. You were given that

Simone = $65.35 + Dan

Simone = Carly - 37.50

Carly = 127.75

So Simone = 127.75 - 37.50 = 90.25

Simone = 65.35 + Dan or Dan = Simone - 65.35

Dan = 90.25 - 65.35 = 24.90

7 0

3 years ago