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
Ivanshal [37]
3 years ago
8

Y - ( -3y ) what is the answer????

Mathematics
2 answers:
Nataly_w [17]3 years ago
7 0

Answer:

4y

Step-by-step explanation:

y - -3y

Subtracting a negative is like adding

y+3y

Combine like terms

4y

poizon [28]3 years ago
5 0

Answer:

4y

Step-by-step explanation:

y - ( - 3y) \\ y + 3y \\  = 4y

hope this helps

brainliest appreciated

good luck! have a nice day!

You might be interested in
What is the approximate circumference of a semicircle with a radius of 12 centimeters?
lisabon 2012 [21]
You do Pi×Radius^2
so 24×Pi=75.4
then 75.4÷2=37.7
4 0
3 years ago
Read 2 more answers
Help Asap 39 points pic below
mestny [16]
The answer is B! Hopefully this helps a lot ......GOOD LUCK
6 0
3 years ago
Hanna shops for socks that cost $2.99 for each pair and blouses that cost $12.99 each. Let x represent the number of pairs of so
lesya692 [45]
X:  # of pairs of socks; y:  # of blouses
Then $2.99x+$12.99y=$43.92.
5 0
3 years ago
Read 2 more answers
A counselor at a community college claims that the mean GPA for students who have transferred to State University is more than 3
Lena [83]

Answer:

t=\frac{3.25-3.1}{\frac{0.3}{\sqrt{36}}}=3  

If we compare the p value and the significance level for example \alpha=1-0.99=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis.

And the best conclusion would be:

a) Yes. The counselor's claim is valid

Because we reject the null hypothesis in favor to the alternative hypothesis.

Step-by-step explanation:

Data given and notation  

\bar X=3.25 represent the sample mean

s=0.3 represent the sample standard deviation

n=36 sample size  

\mu_o =3.1 represent the value that we want to test  

\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is more than 3.1, the system of hypothesis would be:  

Null hypothesis:\mu \leq 3.1  

Alternative hypothesis:\mu > 3.1  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic  

We can replace in formula (1) the info given like this:  

t=\frac{3.25-3.1}{\frac{0.3}{\sqrt{36}}}=3  

P-value  

The first step is calculate the degrees of freedom, on this case:  

df=n-1=36-1=35  

Since is a one right tailed test the p value would be:  

p_v =P(t_{(35)}>3)=0.00247  

Conclusion  

If we compare the p value and the significance level for example \alpha=1-0.99=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis.

And the best conclusion would be:

a) Yes. The counselor's claim is valid

Because we reject the null hypothesis in favor to the alternative hypothesis.

5 0
3 years ago
On Earth day, a local community wants to distribute 800 flyers, 300 banners, and 250 badges to volunteers in packets containing
steposvetlana [31]

Answer:

800 flyersOn Earth day, a local community wants to distribute 800 flyers, 300 banners, and 250 badges to volunteers in packets containing the three items. What is the greatest number of packets that can be made using all these items if each type of item is equally distributed among the packets?

4 0
3 years ago
Other questions:
  • Geometric mean for 12 and 3
    7·2 answers
  • I need you to walk me through how you got the answer to 298÷4
    10·2 answers
  • Identify the horizontal asymptote of f(x) = quantity 2 x minus 1 over quantity x squared minus 7 x plus 3. y = 0 y = 1 over 2 y
    14·2 answers
  • 10 POINTS AND BRAINLIEST! QUESTIONS IN PICTURES
    13·1 answer
  • Determine the exact formula for the following discrete models:
    6·1 answer
  • Divide the following. 3+7i/5i
    8·1 answer
  • What is -4 &gt; - 4/3 s​
    14·1 answer
  • What does 2.x246 times x3.35894 equals
    8·1 answer
  • A circular flower garden has a radius of 19 ft that
    5·1 answer
  • Use the given transfer function and identify the correct steady-state response yss(t) to the given input function f(t). t(s)=y(s
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!