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Flura [38]
3 years ago
5

Y = x-1 Given x = 5 y =

Mathematics
2 answers:
Flura [38]3 years ago
4 0

Answer:

When x=5, y=4

Step-by-step explanation:

Whenever you have to solve these kinds of equations, all you have to do is substitute what you already have into it.

<u>The equation you've been given is:</u>

y = x - 1

They want you to find what y is, when x = 5

<u>So substitute in x=5:</u>

y = 5 - 1

y=4

Hope that helped : )

Firdavs [7]3 years ago
3 0
The answer would be 4 bc 5 minus 1 is 4. x = 4. y = 4.
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The heights of a random sample of 50 college students showed a mean of 174.5 centimeters and a standard deviation of 6.9 centime
Minchanka [31]

Answer:

Step-by-step explanation:

Hello!

For me, the first step to any statistics exercise is to determine what is the variable of interest and it's distribution.

In this example the variable is:

X: height of a college student. (cm)

There is no information about the variable distribution. To estimate the population mean you need a variable with at least a normal distribution since the mean is a parameter of it.

The option you have is to apply the Central Limit Theorem.

The central limit theorem states that if you have a population with probability function f(X;μ,δ²) from which a random sample of size n is selected. Then the distribution of the sample mean tends to the normal distribution with mean μ and variance δ²/n when the sample size tends to infinity.

As a rule, a sample of size greater than or equal to 30 is considered sufficient to apply the theorem and use the approximation.

The sample size in this exercise is n=50 so we can apply the theorem and approximate the distribution of the sample mean to normal:

X[bar]~~N(μ;σ2/n)

Thanks to this approximation you can use an approximation of the standard normal to calculate the confidence interval:

98% CI

1 - α: 0.98

⇒α: 0.02

α/2: 0.01

Z_{1-\alpha /2}= Z_{1-0.01}= Z_{0.99} =2.334

X[bar] ± Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

174.5 ± 2.334* \frac{6.9}{\sqrt{50} }

[172.22; 176.78]

With a confidence level of 98%, you'd expect that the true average height of college students will be contained in the interval [172.22; 176.78].

I hope it helps!

4 0
2 years ago
What is 1 plus 2/3 over 1 minus 1/6
Setler79 [48]
I tried to understand what you wrote
1+2/3 -1 1/6 I got 1/2

8 0
3 years ago
SOMEONE PLEASE HELP ME QUICK WILL GIVE BRAINLIEST
Wittaler [7]

Answer:

IT would be B I believe

Step-by-step explanation:

f(x) = 3x + 391

4 0
2 years ago
The ages of several trees in a neighborhood are shown below: 27 years, 3 years, 2 years, 25 years, 5 years What is the mean age
nata0808 [166]
Mean is equal to sum/ number of values

27+3+2+25+5=62
62/5=12.4

Final answer: D, 12.4 years
5 0
2 years ago
Read 2 more answers
What is the answer to x+y=2
Ahat [919]

Answer:

u need 2 equation to solve

Step-by-step explanation:

7 0
3 years ago
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