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
Nesterboy [21]
2 years ago
10

How many two-digit, positive integers can be formed from the digits 1, 3, 5, and 9, if no digit is repeated?

Mathematics
1 answer:
irga5000 [103]2 years ago
8 0

Answer:

<u>12</u>

Step-by-step explanation:

Using Permutation Formula :

  • ⁴P₂
  • 4! / 2!
  • 4 x 3 x 2! / 2!
  • 4 x 3
  • <u>12</u>
You might be interested in
Nina and Ryan each ran at a constant speed for a 100-meter race. Each runner’s distance for the same section of the race is disp
Elden [556K]

"Nina and Ryan each ran at a constant speed for a 100-meter race. Each runner’s distance for the same section of the race is displayed..." Ryan had a head start of 10 meters.

This is further explained below.

<h3>Who had a head start, and how big was the head start?</h3>

Generally,  To help low-income children and their families, the United States government funds a program called Head Start, which offers a variety of services including early childhood education, health care, nutrition education, and parent engagement.

In conclusion,  who had a head start, and how big the head start was is; Ryan had a head start of 10 meters.

Read more about distance

brainly.com/question/15172156

#SPJ1

6 0
2 years ago
Obtain an estimate for the following computation by rounding the numbers so that the resulting arithmetic can easily be performe
uranmaximum [27]

Answer:

Step-by-step explanation:

2915 can stay as it is; 15.458 should be rounded down to 15.  Then we have

2915-15, or 2900 (which is a very reasonable estimate).

3 0
3 years ago
A random sample of 85 group leaders, supervisors, and similar personnel at General Motors revealed that, on average, they spent
andreyandreev [35.5K]

Answer:

Step-by-step explanation:

From the information given,

Number of personnel sampled, n = 85

Mean or average = 6.5

Standard deviation of the sample = 1.7

We want to determine the confidence interval for the mean number of years that personnel spent in a particular job before being promoted.

For a 95% confidence interval, the confidence level is 1.96. This is the z value and it is determined from the normal distribution table. We will apply the following formula to determine the confidence interval.

z×standard deviation/√n

= 1.96 × 6.5/√85

= 1.38

The confidence interval for the mean number of years spent before promotion is

The lower end of the interval is 6.5 - 1.38 = 5.12 years

The upper end is 6.5 + 1.38 = 7.88 years

Therefore, with 95% confidence interval, the mean number of years spent before being promoted is between 5.12 years and 7.88 years

4 0
3 years ago
Write a rule for the nth term of the arithmetic sequence described below.
belka [17]

Answer:

an = 115 + (n - 1) (-6)

a25 = - 29

Step-by-step explanation:

We use the definition for the nth term of an arithmetic sequence:

an = a1 + (n - 1) d

a5 = 91 = a1 + (5 - 1) d

91 = a1 + 4 d

a20 = 1 = a1 + (20 - 1) d = a1 + 19 d

1 = a1 + 19 d

now we subtract term by term one expression from the other

90 = 4 d - 19 d

90 = - 15 d

divide both sides by -15 to isolate d

d = 90 / (-15) = -6

Now we can calculate what a1 is using for example:

1 = a1 + 19 d

1 = a1 - 114

add 114 to both sides:

115 = a1

Then our general expression for the sequence is:

an = 115 + (n - 1) (-6)

We can now use it to calculate the value of a25:

a25 = 115 + (24) * (-6) = -29

7 0
2 years ago
(True or False) 17/20 is equivalent to 85%
34kurt
The answer is true!!
3 0
2 years ago
Read 2 more answers
Other questions:
  • The 7th graders in the middle school are going on a field trip to the aquarium. They will spend 4 ¼ hours walking inside of the
    12·1 answer
  • Chad drove 168 miles in 3 hours. How many miles per hour did chad drive ?
    14·1 answer
  • CAN SOMEONE PLEASE HELP!!!! determine the value of x. i’ll give you points if you answer!
    15·1 answer
  • W (-4 + z) = mz + 17
    15·1 answer
  • Help plz:)))I’ll mark u Brainliest
    11·1 answer
  • Element X is a radioactive isotope such that every 11 years, its mass decreases by half.
    12·1 answer
  • Select all equations that have infinitely many solution ​
    8·1 answer
  • Which equation is true when the value of x is -127
    12·1 answer
  • X + 2xy- y^2 = 2<br><br> find dy/dx using implicit differentiation
    6·1 answer
  • 2500 principal earning 4%, compounded quarterly, after 4 years.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!