1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
STatiana [176]
2 years ago
11

Make w the subject of the formula z = w + 3

Mathematics
1 answer:
bogdanovich [222]2 years ago
3 0

Answer:

w = -z(-w) + 3(-w)

Step-by-step explanation:

z = w + 3 | Given

-w + z = 3 | Subtract w from both sides.

-w = -z + 3 | Subtract z from both sides

w = -z(-w) + 3(-w) | Multiply -w on both sides.

You might be interested in
3 out of 20 boxes are damaged what percent is damaged?
Goshia [24]
The answer is 15%.
Just divide 3 and 20.
7 0
3 years ago
Read 2 more answers
In order to ensure efficient usage of a server, it is necessary to estimate the mean number
juin [17]

Answer:

a. [36.19;39.21]

b. Reject the null hypothesis. The population mean of users that are connected at the same time is greater than 35.

Step-by-step explanation:

Hello!

Your study variable is,

X: "number of users of one server at a time"

The objective is to estimate the mean, for this, a sample of n=100 times was taken and the standard deviation S= 9.2 and the sample mean is X[bar]= 37.7 were calculated.

You need to study the population mean, for this you need your variable to have at least normal distribution. Since you don't have information about its distribution, but the sample is big enough (n≥30) you can apply the Central Limit Theorem and approximate the distribution of the sample mean X[bar] to normal:

X[bar]≈N(μ;σ²/n)

a. With this approximation, you can construct the 90% Confidence Interval using the approximate Z

[X[bar] ± Z_{1-\alpha /2} * S/√n]

Z_{1-\alpha /2} = Z_{0.95} = 1.64

[37.7± 1.64* 9.2/√100]

[36.19;39.21]

b. You need to test if the population mean is greater than 35 with a level of significance of 1%.

The hypothesis is:

H₀: μ ≤ 35

H₁: μ > 35

α: 0.01

This is a one-tailed test so you have only one critical level (right tail):

Z_{1\alpha } = Z_{0.99} = 2.33

This means that if the value of the calculated statistic is equal or greater than 2.33 you will reject the null Hypothesis.

If the value is less than 2.33 you will support the null hypothesis.

The statistic is:

Z=<u> X[bar] - μ </u>= <u> 37.7 - 35 </u> = 2.93

       S/√n           9.2/10

The value 2.93 > 2.33, so you reject the null hypothesis. This means that the population mean of users that are connected at the same time is greater than 35.

<u><em>Note: </em></u><em>To make the decision using the interval calculated on a), the hypothesis should have been two-tailed and the confidence and significance levels complementary.</em>

I hope it helps!

7 0
2 years ago
Is 3/12 equivalent to 1/3
Goshia [24]

Answer:

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
(07.06 MC) What is the solution to the equation 1.2m − 0.8 = −2.0m? m = 0.25 m = 0.4 m = 1 m = 4
Vikki [24]

Answer:

m = 0.25

Step-by-step explanation:

-0.8 = -3.2m

m = 0.25

8 0
2 years ago
When the water was 4 feet from the end of the hose, what was its height above the ground? 3.2 feet 4.8 feet 5.6 feet 6.8 feet
Crank

Answer:

Step-by-step explanation:

a. 3.2 feet

8 0
2 years ago
Other questions:
  • The mean of a set of five test scores is m. what is the sum of the five test scores?
    14·1 answer
  • How do you write an algebraic expression for 42 decreased by twice some number
    11·1 answer
  • Find the difference quotient please
    7·1 answer
  • Please answer , thank you
    9·1 answer
  • Explain how to factor the following trinomials forms: x2 + bx + c and ax2 + bx + c. Is there
    12·1 answer
  • HELP ASAP PLEASE!!!! I’m really confused
    8·1 answer
  • Can someone explain and tell the answer please
    13·1 answer
  • M∠HGF=16x+4, m∠EGF=110 degrees, and m∠HGE=3x+11. Find x.
    15·2 answers
  • You leave home and walk 3 blocks east, then 4 blocks north. How far are you from<br><br>home?
    7·1 answer
  • 3. Considering the following two-way frequency table:
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!