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
myrzilka [38]
2 years ago
14

Last someone someone helppp

Mathematics
2 answers:
exis [7]2 years ago
6 0

Answer:

3

Step-by-step explanation:

c=2m+d

c-d=2m

(c-d)/2=m

option 3

ollegr [7]2 years ago
4 0

Answer:

your answer should be number 1

You might be interested in
A psychologist obtains a random sample of 2020 mothers in the first trimester of their pregnancy. The mothers are asked to play
leva [86]

Answer:

First of all, we need to determine the system of hypothesis, which must have a null and alternative hypothesis.

In all hypothesis proof procedure, we must work with the null one, rejecting it or accepting it. If we reject the null hypothesis, it will mean that our principal hypothesis is true.

According to the problem, the null hypothesis must be: H_{o} : u = 100; because it says that 100 is the normal mean that is used.

The alternative hypothesis must be: H_{a} : u > 100; because the question is asking if there's enough evidence to say that they children have a higher IQ than 100.

Then, we must calculate the P-value, which is the probability value that we are gonna use to accept or reject the null hypothesis. This P-value we can calculate it with the formula: Z=\frac{x-u}{\frac{o}{\sqrt{n} } }; where x is the sample mean, u is the hypothetical mean parameter, o is the sample deviation and n is the sample.

Extracting all values from the problem: x = 104.3; u = 100; o = 14 and n = 20.

Applying all values to the formula: Z=\frac{104.3 - 100}{\frac{14}{\sqrt{20} } } = \frac{4.3}{\frac{14}{ 4.5} }=\frac{4.3}{3.1}=1.4

Then, this Z-value will give us the P-value by using the Z-table with the 0.05 level of significance. In table attached, we can see that the result is 0.9265. However, the P-value is 1 - 0.9265 = 0.735. We need to do this subtraction because, the result 0.9265 belong to the bigger area (as it's shown is the image in blue colour), and we need the smaller area, which belong to the 0.05 level of significance.

<em>In this problems, if the P-value is more than the level of significance, the null hypothesis is accepted. If the P-value is less than the level of significance the null hypothesis is rejected.</em>

Therefore, there is no enough evidence to say that the sample children have higher IQs, because the P-value is higher than the level of significance. (0.735>0.05).

5 0
3 years ago
How must m2 be changed to keep the lines parallel?
Anna [14]

Answer:

bring the lines side by side ( example || )

Step-by-step explanation:

3 0
3 years ago
Convert the mixed number to an improper fraction. enter your answer below using the slash mark ( / ) as the fraction bar
eduard
The Answer Fam Is 99/10
5 0
3 years ago
In a wrestling contest, a wrestler needs a winning percentage of at least 70% to qualify for round 2. sam lost 3 out of 12 match
algol [13]
He won about 25% because 6/12 would be 1/2 and 3 is 1/2 of 6 or a 1/4 so 25%
8 0
3 years ago
Evaluate <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bu%7D%7Bz%7D%20%2Bxy%5E3" id="TexFormula1" title="\frac{u}{z} +xy^3" alt="\f
Elanso [62]
The explanation is on the board just tell me if you have questions

8 0
3 years ago
Other questions:
  • A photograph measures 4 inches wide and 5 inches long if you have the photograph in large to fit a frame 36 inches long what is
    6·1 answer
  • Mrs. Chesney bought 3 games at a cost of $14.99 each. What will she pay including 7% sales tax
    8·1 answer
  • What is the approximate uncertainty in the area of a circle of radius 3.1×104cm? Express your answer using one significant figur
    14·1 answer
  • If x represents the hypotenuse of this right triangle, which equation can be used to find the value of x?
    15·1 answer
  • A caterer prepared a large ham that weighed 15 1/8 pounds . After cooking , the chef trimmed the ham and removed the bone , so t
    14·2 answers
  • Consider function f below. f(x)=4^x-6 Determine function g which is created by shifting the graph of function f up 5 units.
    7·1 answer
  • So there is 400 student and 12% kids want to be athletes how many kids want to be athlete?
    7·1 answer
  • I NEED HELP ASAP PLS ANSWERR
    15·1 answer
  • Ingrid Nilsen purchased a $4,000 hydroponic system for her garden. The down payment is 20%, and the
    15·1 answer
  • WHAT TWO EQAUL NUMBERS ADD TO THE EVEN NUMER 40
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!