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Lerok [7]
3 years ago
10

The variables x and y vary directly. Write an equation that relates x and y, when x = 4 and y = 16

Mathematics
2 answers:
Nesterboy [21]3 years ago
8 0

Answer:

y = 4x

Step-by-step explanation:

When we say that x and y "vary directly", we mean that they have the relationship: y = kx, where k is a "constant of proportionality".

Here, we want to know what k is, so we plug 4 in for x and 16 in for y:

y = kx

16 = k * 4

k = 16/4 = 4

Thus, our equation is y = 4x.

yaroslaw [1]3 years ago
5 0
X5-y5
I think I really don’t understand the question can I have Brainliest!!:)
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Jenna said not to pull out and then she had a baby and could not build a fence. so this question is irrelevent.
4 0
3 years ago
Ill give brainlest again!!!!!!!!!!!!!!!
mash [69]

Answer:

40

Step-by-step explanation:

the range is the number between the highest and lowest number. the lowest in this is 5 and the highest is 45

45-5=40

3 0
3 years ago
In a recent survey 75 of the community favored building a police substation in their neighborlhood. If 20 citizens are chosen. W
Anton [14]

Answer:

Mean = 15

Standard deviation = 1.94

Step-by-step explanation:

We are given the following information:

We treat favoring of building a police substation as a success.

P(Success) = 75% = 0.75

Then the number of citizens follows a binomial distribution, where

P(X=x) = \binom{n}{x}.p^x.(1-p)^{n-x}

where n is the total number of observations, x is the number of success, p is the probability of success.

Now, we are given n = 20

We have to find the mean and the standard deviation.

\mu = np = 20(0.75 ) = 15\\\sigma = \sqrt{np(1-p)} = \sqrt{20(0.75)(1-0.75)} = 1.94

Thus, the mean of favoring the substation is 15 and the standard deviation of favoring substation is 1.94

7 0
3 years ago
Functions f(x) and g(x) are shown below. f(x) = x2. . g(x) = x2 - 8x + 16. In which direction and by how many units should f(x)
Aliun [14]
The original function is given by:
 f (x) = x ^ 2

 We apply the following transformation:
 Horizontal displacements:
 Suppose k> 0
 To move the graph k units to the right, we must graph f (x-k)
 Applying the transformation for k = 4 we have:
 g (x) = f (x-4)

g (x) = (x-4) ^ 2

g (x) = x ^ 2 - 8x + 16
 Answer:
 
B. Right by 4 units
3 0
3 years ago
Read 2 more answers
Could Someone help me, thank you so much!
maxonik [38]

Answer: Answer choice A

Step-by-step explanation:

Because 2 has 20 copies 4 has 40 so we can only assume that 6 will follow the pattern and be 60.

Hope it helps!

5 0
3 years ago
Read 2 more answers
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