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dexar [7]
3 years ago
5

The variables x and y vary directly. if one pair of the values is x = 3 and y = 12, write an equation that shows the relationshi

p between x and y.

Mathematics
2 answers:
8090 [49]3 years ago
7 0
The variables x and y vary directly. if one pair of the values is x = 3 and y = 12, write an equation that shows the relationship between x and y.

Leno4ka [110]3 years ago
6 0
If they vary directly then they increase at the same amount
This can be written out with the equation
y/x=k k being the constant of the variation
In this case 12/3=4 the constant is 4
So you can say y=4x
You might be interested in
Is 12.89 irrational
STatiana [176]

No.  It's the ratio of  1,289  to  100 .

Also, it can be written as a fraction with whole numbers
on top and bottom, like this:    1289 / 100 .

Also, it can be written down on paper completely, using
digits and a decimal point or fraction bar.  (You did that.)

Any one of these three facts makes it a rational number.

7 0
4 years ago
Is the answer A ?????<br><br> I don't know, plzzzz help me
-Dominant- [34]
I think very well that it is A or B. With my experience, but you might want to keep doing research.

8 0
3 years ago
Read 2 more answers
Determine the value of −14.1 × (-7.33)
Darya [45]

Answer:

Multiply -14.1 by -7.33.103.353     ?

Step-by-step explanation:

Sorry I'm not very good at math hope this helps..

8 0
3 years ago
Please help me find X
tensa zangetsu [6.8K]

Answer:

<em> 50° </em>

Step-by-step explanation:

x° = 180° - (102° + 28°) =<em> 50°</em>

5 0
3 years ago
The Miller family visited Mama's Kitchen and ordered 4 hamburgers and 3 medium fries and paid $13.27. James ordered a medium dri
ioda
Let's start out by setting up three separate equations for each customer.
d = cost of drink, f = cost of fries, h = cost of hamburger

Miller Family: 4h + 3f = 13.27
James: d + h + 2f = 6.33
Steven: 2h + f + d = 7.04

Since the Miller's didn't order any drinks, let's start by using substitution to find the cost of d between James and Steven.

Let's isolate d with James:
d + h + 2f = 6.33
d = 6.33 - h - 2f

Now let's plug that into Steven's equation:
2h + f + d = 7.04
2h + f + (6.33 - h - 2f) = 7.04
h - f + 6.33 = 7.04
h - f = 0.71
h = 0.71 + f

Let's plug that new h into the Miller Family's equation:
4h + 3f = 13.27
4(0.71 + f) + 3f = 13.27
2.84 + 4f + 3f = 13.27
2.84 + 7f = 13.27
7f = 10.43
f = 1.49

So medium fries cost $1.49

Let's plug f back into the Miller Family's equation to get h:
4h + 3f = 13.27
4h + 3(1.49) = 13.27
4h + 4.47 = 13.27 
4h = 8.8
h = 2.2

So a hamburger costs $2.20

Let's plug h and f into Steven's equation to calculate d

2h + f + d = 7.04
2(2.2) + (1.49) + d = 7.04
4.4 + 1.49 + d = 7.04
5.89 + d = 7.04
d = 1.15

So a medium drink costs $1.15

The answer is B. Drink = $1.15, Fries = $1.49, Hamburger = $2.20
5 0
4 years ago
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