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
Paha777 [63]
3 years ago
6

Mary had a number of cookies. after eating one, she gave half the remainer to her sister. after eating another cookie, she gave

half of what was left to her brother. mary now had only five cookies left. how many cookies did she start with?
Mathematics
1 answer:
Gemiola [76]3 years ago
8 0
She originally started with 23. 

We can tell this by working the equation backwards. Since she has 5 left and she had just given half to her brother, we know she had 10 a moment ago. 

Before that, Mary had eaten a cookie. So we add 1 to the total and now have 11.

Before eating that cookie, she has given half to her sister, which would give her 22. 

And before giving half to her sister, she had eaten the first one, which would give us 23 to start with. 
You might be interested in
The value of 7 in 17.92 is times as much value of 7 in 92.17
koban [17]
100
.. . . . . . . . .
3 0
3 years ago
The average age of instructors at a local college is 55, with a standard deviation of 6 years; the average salary is $37,000 wit
Lerok [7]
To solve for the coefficient of variation you will need this formula:
CV = (SD/X) x 100 
Where: CV = Coefficient of Variance
             X = Mean/average
             SD = Standard Deviation

To determine which one is more variable, just get the coefficient of both and compare.
                   AGE                                            SALARY
   
  CV = (6/55) x 100                             CV = (4,100/37,000) x 100
        = 10.90                                             = 11.08

Based on the results, salary is more variable because 10.90<11.08.
8 0
3 years ago
Which measure of center is the best to use to compare the prices of kid socks and adult socks?
k0ka [10]

Answer:

The answer is mean

Step-by-step explanation:

The mean is the average cost of the socks, so finding the mean of both would give an average price to compare them to. :)

3 0
3 years ago
Read 2 more answers
The odds of winning a contest are 3:7. What is the probability winning the contest?
DiKsa [7]

Answer:

0.3

Step-by-step explanation:

Given: The odds of winning a contest are 3:7

To find: probability of winning the contest

Solution:

Probability refers to chances of occurrence of an event.

Odds are defined as (chances for success) : (chances against success)

Probability of winning = (chances for success) : (chances for success + chances against success)  

As odds of winning a contest are 3:7,

(chances for success) : (chances against success) = 3:7

So,

Probability of winning the contest = \frac{3}{3+7} =\frac{3}{10}=0.3

5 0
3 years ago
a mountain decends a mountain for 5 hours. On average, she climbs down 500 feet each hour. what is her change in elevation after
pentagon [3]
I 5 hours she will be 2,500 feet down
8 0
3 years ago
Read 2 more answers
Other questions:
  • if the cost of 4 shirts 4 pants 2cap is 560 dollars in a shop and the cost of 9shirts 9 paints and 6 caps is 1290 dollars then f
    7·1 answer
  • If sin Θ = negative square root 3 over 2 and π &lt; Θ &lt; 3 pi over 2, what are the values of cos Θ and tan Θ? cos Θ = negative
    10·2 answers
  • Os numeros 5, (3x-1) (3x+2) nessa ordem formam uma PA. Calcule o valor de x
    13·1 answer
  • What's the decimal 0.87 as a fraction in simplest form
    5·2 answers
  • Check all of the following that are solutions to the system shown below.
    13·1 answer
  • An electrician charges $322 for 7 hours of work. How much does the electrician charge for one hour?
    9·1 answer
  • HELP PLEASE ASAP!!
    11·1 answer
  • WILL GIVE BRAINLIEST!!Soro bought a $50.00 bus card at the beginning of the week. Each bus ride costs $2.50. He needs to have at
    15·2 answers
  • Need answer as soon as possible
    11·2 answers
  • How many different sequences of 3 playing cards (from a single 52-card deck) exist?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!