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
Naya [18.7K]
3 years ago
7

If f ( x ) = 2 x - 5, then f (4) is _____. 17 5 4 3 Thx

Mathematics
2 answers:
VashaNatasha [74]3 years ago
5 0

Answer:

3

Step-by-step explanation:

f(x)=2x-5

f(4)=2(4)-5

f(4)=8-5

f(4)=3

Slav-nsk [51]3 years ago
4 0

Answer:

f(4)= 3

Step-by-step explanation:

f ( x ) = 2 x - 5

then f(4)= 2(4)-5

f(4)= 8-5

f(4)= 3

You might be interested in
What does absolute value mean?​
Lynna [10]
Absolute value is the magnitude of a number without regard to its sign. for example, the absolute value of 5 is 5, and the absolute value of -5 is also 5!
4 0
3 years ago
May you tell me which one is the Correct Answer, Thank you.
nexus9112 [7]
No the correct answer is c. If you use the formula
Y2- Y1
X2-X1
You could use this to find the slope. And then the y-intercept if any.
6 0
3 years ago
The distance between the pair of points (0,-10) and (-9,-10)
m_a_m_a [10]

✨✨✨✨✨✨✨✨✨✨✨✨✨✨✨✨✨

<em><u>hope it helps you see the attachment for further information...... </u></em>

<em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em><em><u>⚡</u></em>

6 0
3 years ago
If line d intersects plane F, then how many points on line d also lie on plane F?
Rudiy27

Answer:

the answer is one 1111111111111111111111111111111111111

Step-by-step explanation:

8 0
3 years ago
Suppose that a password for a computer system must have at least 8, but no more than 12, characters, where each character in the
uranmaximum [27]

Part a)

There are 52 letters (26 lowercase and 26 uppercase), 10 digits, and 6 symbols. There are 52+10+6 = 68 different characters to choose from.

  • If there are 8 characters for this password, then we have 68^8 = 4.5716 * 10^14 different passwords possible.
  • If there are 9 characters, then we have 68^9 = 3.1087 * 10^16 different passwords
  • If there are 10 characters, then we have 68^10 = 2.1139 * 10^18 different passwords
  • If there are 11 characters, then we have 68^11 = 1.4375 * 10^20 different passwords
  • If there are 12 characters, then we have 68^12 = 9.7748 * 10^21 different passwords

Adding up those subtotals gives

68^8+68^9+68^10+68^11+68^12 = 9.9207 * 10^21

different passwords possible.

<h3>Answer: Approximately 9.9207 * 10^21 </h3>

======================================================

Part b)

Let's find the number of passwords where we don't have a special symbol

There are 52+10 = 62 different characters to pick from

  • If there are 8 characters for this password, then we have 62^8 = 2.1834 * 10^14 different passwords possible.
  • If there are 9 characters, then we have 62^9 = 1.3537 * 10^16 different passwords
  • If there are 10 characters, then we have 62^10 = 8.3930 * 10^17 different passwords
  • If there are 11 characters, then we have 62^11 = 5.2037 * 10^19 different passwords
  • If there are 12 characters, then we have 62^12 = 3.2263 * 10^21 different passwords

Adding those subtotals gives

62^8+62^9+62^10+62^11+62^12 = 3.2792 * 10^21

different passwords where we do not have a special character. Subtract this from the answer in part a) above

( 9.9207 * 10^21)  - (3.2792 * 10^21) = 6.6415 * 10^21

which represents the number of passwords where we have one or more character that is a special symbol. I'm using the idea that we either have a password with no symbols, or we have a password with at least one symbol. Adding up those two cases leads to the total number of passwords possible.

<h3>Answer: Approximately 6.6415 * 10^21</h3>

======================================================

Part c)

The answer from part a) was roughly 9.9207 * 10^21

It will take about 9.9207 * 10^21  nanoseconds to try every possible password from part a).

Divide 9.9207 * 10^21  over 1*10^9 to convert to seconds

(9.9207 * 10^21 )/(1*10^9) = 9,920,700,000,000

This number is 9.9 trillion roughly.

It will take about 9.9 trillion seconds to try every password, if you try a password per second.

------

To convert to hours, divide by 3600 and you should get

(9,920,700,000,000)/3600 = 2,755,750,000

So it will take about 2,755,750,000 hours to try all the passwords.

------

Divide by 24 to convert to days

(2,755,750,000)/24= 114,822,916.666667

which rounds to 114,822,917

So it will take roughly 114,822,917 days to try all the passwords.

------

Then divide that over 365 to convert to years

314,583.334246576

which rounds to 314,583

It will take roughly 314,583 years to try all the passwords

------------------------------

<h3>Answers:</h3>
  • 9.9 trillion seconds
  • 2,755,750,000 hours
  • 114,822,917 days
  • 314,583 years

All values are approximate, and are roughly equivalent to one another.

5 0
3 years ago
Other questions:
  • Here’s what they are asking
    14·1 answer
  • 9(g+3) use the distributive property to multiply
    12·2 answers
  • The question is below
    8·1 answer
  • The diameter of each wheel of a bicycle is 26 inches if you’re traveling at a speed of 35 mph on his bicycle through how many re
    15·1 answer
  • Which ordered pairs make both inequalities true?
    14·1 answer
  • The sum of two numbers 94. their diffirence is 12
    7·2 answers
  • Betty correctly determined that the ordered pair (–3, 5) is a solution to the system of linear equations 6 x + 5 y = 7 and x + 4
    14·2 answers
  • Quiz 3-3 Parallel and Perpendicular Lines on the Coordinate Plane (Gina Wilson All Things Algebra 2014-2019) need these for a qu
    13·2 answers
  • An airplane flies with a constant speed of 620 miles per hour. How long will it take to
    13·1 answer
  • Laura is a single taxpayer, she has $35,000 in ordinary taxable income and $5,000 in capital gains on an investment she held for
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!