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
Helga [31]
3 years ago
10

I dont want the answers, i just need help understanding it? I am not good with negatives and positives.

Mathematics
2 answers:
Shkiper50 [21]3 years ago
5 0
Subtracting a negative is like adding a positive. so -7-15 would be -22
Korvikt [17]3 years ago
4 0
So, -15-12 first you have to add the opposite, which means change the subtraction sign to a + sign and change the -12 to positive to get -27
You might be interested in
Estimste each sqare root to the nearest integer<br>what
Bezzdna [24]
You have to estimate the square root which is what times itself equals the number in the square root. An integer is another word for a whole number or a number without any fractions. So you have to estimate what the square root is to the nearest whole number.
6 0
4 years ago
Please help this is 10 points only but please help my little sister needs help with this
hoa [83]

Answer:

Step-by-step explanation:

the cost is $111

3 0
3 years ago
A survey in Men’s Health magazine reported that 39% of cardiologists said that they took vitamin E supplements. To see if this i
zzz [600]

Answer:

z=\frac{0.36 -0.39}{\sqrt{\frac{0.39(1-0.39)}{100}}}=-0.615  

The p value for this case would be:

p_v =2*P(z  

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true proportion is not different from 0.39

Step-by-step explanation:

Information given

n=100 represent the random sample taken

X=36 represent the number of people that take E supplement

\hat p=\frac{36}{100}=0.36 estimated proportion of people who take R supplement

p_o=0.39 is the value that we want to test

\alpha=0.05 represent the significance level

z would represent the statistic

p_v represent the p value

Hypothesis to test

We want to test if the true proportion is equatl to 0.39 or not, the system of hypothesis are.:  

Null hypothesis:p=0.39  

Alternative hypothesis:p \neq 0.39  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info we got:

z=\frac{0.36 -0.39}{\sqrt{\frac{0.39(1-0.39)}{100}}}=-0.615  

The p value for this case would be:

p_v =2*P(z  

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true proportion is not different from 0.39

8 0
3 years ago
When riding a bicycle, wear.<br> O gloves<br> SH<br> O a jacket<br> O a helmet<br> glasses
zavuch27 [327]

Answer:

Most often people wear a helmet when riding a bike.

4 0
3 years ago
Read 2 more answers
HELPP AND. D IS 10 it got cut out
Inga [223]

Answer: 2

Step-by-step explanation:

2

7 0
3 years ago
Read 2 more answers
Other questions:
  • Help please ASAP PLEASE
    8·2 answers
  • HELP <br> How would I find C? would I have to subtract 180 from 50??
    12·1 answer
  • according to the table below, which of these is a possible income for a taxpayr filing with the single filing status 25% federal
    9·2 answers
  • Video streaming company A charges a one-time $40 membership fee and $2 per video stream. Video streaming company B charges a one
    6·1 answer
  • What is the value of x?<br><br><br><br> x over 4 equals 14 over 16<br><br><br><br> x =
    7·2 answers
  • What is the approximate circumference of a semicircle with a radius of 12 centimeters?
    13·2 answers
  • PLS HELPP I NEED TO KNOW
    11·1 answer
  • Which property is demonstrated below?
    11·2 answers
  • To find the area of a triangle, you can use the expression b × h ÷ 2, where b is the base of the triangle and h is its height. W
    11·1 answer
  • The number of loaves of bread purchased and the total cost of the bread in dollars can be modeled by the equation c = 3. 5b. Whi
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!