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
bazaltina [42]
2 years ago
5

Rewrite the expression without parentheses. 15m − ( 3 + 5m )

Mathematics
1 answer:
marin [14]2 years ago
8 0

Answer:

Rewritten: 15m -3 - 5m

Step-by-step explanation:

15m − ( 3 + 5m )

15m -3 - 5m

10m - 3

You might be interested in
ASAP HELP HELP NEED HELP FAILING
frez [133]
For the first question, you will write a ratio of 1/2 oz:10 pounds. Please see the attached picture. There are 9 groups of 10 oz in 90 oz, so you will need 9 groups of the amount of medicine too!

For the second question, you need to understand that the exponent (2^3) must be evaluated first because all forms of multiplication/ groupings comes first before adding or subtracting.
Exponents are a way of showing repeated multiplication, so it is done first.
3 0
3 years ago
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
The fractions 3/4,6/8 ,9/12 , and 12/16 are examples of _____.
g100num [7]

Answer:

Equivalent fractions

Step-by-step explanation:

7 0
3 years ago
4x10^4 in standard notation
lyudmila [28]

Answer:

40000

Step-by-step explanation:

4×10^4 = 4×10000 = 40000

6 0
3 years ago
Read 2 more answers
Five friends will share equally 1/2 yard of felt for an art project. How much felt will each friends get
eimsori [14]
The app will only let me give one photo at a time, so here's part 1.

5 0
3 years ago
Read 2 more answers
Other questions:
  • A crane lifts an air conditioner weighing 800 Newtons up to the roof of a building in New York City. It took one minute to raise
    11·1 answer
  • a $1,400 loan has a simple annual interest rate 4%. how much simple interest is paid on the loan for 1 year?
    6·1 answer
  • Given f(x) = 2* and g(x) = 2x + 1 evaluate (f?g)(o) and (g?f)(2).
    9·1 answer
  • |x-1|+5=2 also this question
    15·2 answers
  • Okay, so I know someone else asked for help on this and it said it was 280, but it was not correct on mine for some reason. So,
    12·1 answer
  • I need help with this question
    13·1 answer
  • % of 50 = 12.5<br> Please help.
    12·2 answers
  • Pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee help asap timed test
    12·1 answer
  • 5=r÷¼ <br><br>How do I do this? This makes no sense to me​
    14·2 answers
  • If you pay $107 for groceries including tax, what is the price of groceries before tax when you are taxed at 7%?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!